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mgeeky-Penetration-Testing-.../file-formats/README.md
mgeeky 20acfd5674 fixes
2022-02-08 22:59:11 +01:00

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File-Formats Penetration Testing related scripts, tools and Cheatsheets

  • PackMyPayload - A script that takes file/directory on input and creates a new (or backdoors existing) container file with input ones embedded. Some of the formats (ISO, IMG, VHD, VHDX) could be used to bypass Mark-of-the-Web (MOTW) file taint flag. Supported formats:

    1. ZIP (+password)
    2. 7zip (+password)
    3. PDF (+password)
    4. ISO
    5. IMG
    6. CAB
    7. VHD
    8. VHDX

  • tamperUpx.py - A small utility that corrupts UPX-packed executables, making them much harder to be decompressed & restored.

c:\>py -3 tamperUpx.py foo-upx.exe foo-upx-corrupted.exe

    :: tamperUpx - a small utility that corrupts UPX-packed executables,
    making them much harder to be decompressed & restored.

    Mariusz Banach / mgeeky, '21

Step 1. Renaming UPX sections...
        Renamed UPX section (UPX0    ) => (.text)
        Renamed UPX section (UPX1    ) => (.data)

Step 2. Removing obvious indicators...
        Removed "UPX!" (UPX_MAGIC_LE32) magic value...
        Removed "3.96" indicator...

Step 3. Corrupting PackHeader...
        Overwriting metadata (version=13, format=36, method=2, level=10)...
        Corrupting stored lengths and sizes:
                - uncompressed_adler (u_adler): (2044521623 / 0x79dcec97) => (0)
                - compressed_adler (c_adler): (2542804071 / 0x97901c67) => (0)
                - uncompressed_len (u_len): (1802399544 / 0x6b6e6f38) => (0)
                - compressed_len (c_len): (2653142051 / 0x9e23bc23) => (0)
                - original file size: (529611336 / 0x1f913a48) => (0)
                - filter id: (73 / 0x49) => (0)
                - filter cto: (5 / 0x5) => (0)
                - unused: (0 / 0x0) => (0)
                - header checksum: (197 / 0xc5) => (0)

[+] UPX-protected executable corrupted: foo-upx-corrupted.exe
[+] Success. UPX should have some issues decompressing output artifact now.
  • zipcrack.rb - Simple multi-threaded ZIP cracker. (gist)