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39 lines
1.7 KiB
Markdown
39 lines
1.7 KiB
Markdown
## File-Formats Penetration Testing related scripts, tools and Cheatsheets
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- **`tamperUpx.py`** - A small utility that corrupts UPX-packed executables, making them much harder to be decompressed & restored.
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```
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c:\>py -3 tamperUpx.py foo-upx.exe foo-upx-corrupted.exe
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:: tamperUpx - a small utility that corrupts UPX-packed executables,
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making them much harder to be decompressed & restored.
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Mariusz B. / mgeeky, '21
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Step 1. Renaming UPX sections...
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Renamed UPX section (UPX0 ) => (.text)
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Renamed UPX section (UPX1 ) => (.data)
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Step 2. Removing obvious indicators...
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Removed "UPX!" (UPX_MAGIC_LE32) magic value...
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Removed "3.96" indicator...
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Step 3. Corrupting PackHeader...
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Overwriting metadata (version=13, format=36, method=2, level=10)...
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Corrupting stored lengths and sizes:
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- uncompressed_adler (u_adler): (2044521623 / 0x79dcec97) => (0)
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- compressed_adler (c_adler): (2542804071 / 0x97901c67) => (0)
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- uncompressed_len (u_len): (1802399544 / 0x6b6e6f38) => (0)
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- compressed_len (c_len): (2653142051 / 0x9e23bc23) => (0)
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- original file size: (529611336 / 0x1f913a48) => (0)
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- filter id: (73 / 0x49) => (0)
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- filter cto: (5 / 0x5) => (0)
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- unused: (0 / 0x0) => (0)
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- header checksum: (197 / 0xc5) => (0)
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[+] UPX-protected executable corrupted: foo-upx-corrupted.exe
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[+] Success. UPX should have some issues decompressing output artifact now.
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```
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- **`zipcrack.rb`** - Simple multi-threaded ZIP cracker. ([gist](https://gist.github.com/mgeeky/f89262744fa37e9ec2351dccdc81b44c))
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