Crypter 🧬 Stego Injector – Hide Payload in Images [ SEMIFUD 1/36]

[dEEpEst]

Stego Injector – Red Channel Steganography Dropper & Executable Cloaker​

Stego Injector is a Red Team tool that allows you to inject any .exe payload into a PNG image using red-channel steganography and export a final executable disguised as a `.png`. This PoC is ideal for education, awareness, and research in covert execution techniques.

Features​

• Hide any `.exe` inside a valid PNG image (stego PNG)
• Use XOR obfuscation on the red channel (1 byte per pixel)
• Embed the PNG into an automatic dropper stub
• Execute the payload and show the image seamlessly
• Compile the final `.exe` with custom icon and filename
• Camouflage the final `.exe` as a `.png` using Unicode RTLO
• Clean and silent – no dependencies once compiled

How it works​

1. The selected `.exe` is encoded byte-by-byte into the red channel of a PNG image using `XOR 0x72` + inversion.
2. The modified image is saved as a valid stego PNG.
3. The stego PNG is then base64-encoded and injected into a stub_loader.py template.
4. The stub is compiled into a `.exe` using PyInstaller (with optional custom icon).
5. The resulting `.exe` is renamed using U+202E (RTLO) so it appears as `photo.png` even with extensions visible.
6. When executed, the file:
   - Extracts the PNG
   - Displays the image
   - Extracts and executes the original `.exe` payload silently

Execution Flow Diagram​

Output Example​

Original files:
- innocent.png
- reverse_shell.exe

Final file:
- photo‮gnp.exe → (shown as photo.png)

Payload:
- Executes reverse_shell.exe
- Displays innocent.png to avoid suspicion

Requirements Builder​

• Python 3.7+
• PyInstaller
• Pillow

Final File Requirements​

• None

GUI Screenshot​

Scanner result​

Informe de Escaneo

Detection notes​

• The final `.exe` will be flagged by AVs if the payload is malicious.
• The current detection rate is very low despite testing with malicious files.
• This tool is designed for ethical use and simulation only.
• The PNG shown is fake – it only masks execution; the file is still a PE.

Tested platforms​

​

Tested Rats​

• 888 RAT v 1.2.6 Cracked

Forensic Evasion​

• File extension appears harmless: `.png`
• Valid PNG signature (but only visually; file starts with MZ)
• Payload hidden in pixel data – difficult to detect by casual inspection
• Does not drop to disk until runtime

Disclaimer​

This tool is for educational purposes only. It is intended to demonstrate steganography and evasion techniques in Red Team scenarios, CTFs, and training labs.

Do not use this tool on systems you don’t own or without explicit authorization. The author assumes no responsibility for misuse.​

​

Credits​

Created by @dEEpEst_23 for HTDark Community
Designed to blend payloads with pixels
Stealth meets simplicity.

Download​

• The download is free!!
• Nothing is for sale!!
• It's free!!
• You must decrypt the password.
• Send me the decrypted password via private message.
• Maximum 2 attempts per user.
• You must note in this post that you sent a private message participating.
• The first person to decrypt the password gets it for free.

The code appears at the indicated time: 14:00 UTC

In the image you could find the password to decipher.

Clue:
“The image holds information in the LSB of RGB components. Normalize it first. Then look at the parity.”


Order used to encrypt the password → ROT13 → Base64 (x3) → AES(key= name domain forum) → DES(key= name old domain forum) → Vigenère (key= name creator tool Stego Injector)

https://htdark.com/filecloud/download.php?id=p6d61rt2vz
Password: htdark.com

Source or Demo​

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