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Command-line tools for managing zip files are essential for diagnosing, repairing, and cracking zip files. Here are some key utilities:
unzip
: Reveals why a zip file may not decompress.zipdetails -v
: Offers detailed analysis of zip file format fields.zipinfo
: Lists contents of a zip file without extracting them.zip -F input.zip --out output.zip
andzip -FF input.zip --out output.zip
: Try to repair corrupted zip files.- fcrackzip: A tool for brute-force cracking of zip passwords, effective for passwords up to around 7 characters.
The Zip file format specification provides comprehensive details on the structure and standards of zip files.
It's crucial to note that password-protected zip files do not encrypt filenames or file sizes within, a security flaw not shared with RAR or 7z files which encrypt this information. Furthermore, zip files encrypted with the older ZipCrypto method are vulnerable to a plaintext attack if an unencrypted copy of a compressed file is available. This attack leverages the known content to crack the zip's password, a vulnerability detailed in HackThis's article and further explained in this academic paper. However, zip files secured with AES-256 encryption are immune to this plaintext attack, showcasing the importance of choosing secure encryption methods for sensitive data.
Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!
Other ways to support HackTricks:
- If you want to see your company advertised in HackTricks or download HackTricks in PDF Check the SUBSCRIPTION PLANS!
- Get the official PEASS & HackTricks swag
- Discover The PEASS Family, our collection of exclusive NFTs
- Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
- Share your hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.