54 lines
3.8 KiB
Markdown
54 lines
3.8 KiB
Markdown
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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There are a handful of command-line tools for zip files that will be useful to know about.
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* `unzip` will often output helpful information on why a zip will not decompress.
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* `zipdetails -v` will provide in-depth information on the values present in the various fields of the format.
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* `zipinfo` lists information about the zip file's contents, without extracting it.
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* `zip -F input.zip --out output.zip` and `zip -FF input.zip --out output.zip` attempt to repair a corrupted zip file.
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* [fcrackzip](https://github.com/hyc/fcrackzip) brute-force guesses a zip password (for passwords <7 characters or so).
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[Zip file format specification](https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT)
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One important security-related note about password-protected zip files is that they do not encrypt the filenames and original file sizes of the compressed files they contain, unlike password-protected RAR or 7z files.
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Another note about zip cracking is that if you have an unencrypted/uncompressed copy of any one of the files that is compressed in the encrypted zip, you can perform a "plaintext attack" and crack the zip, as [detailed here](https://www.hackthis.co.uk/articles/known-plaintext-attack-cracking-zip-files), and explained in [this paper](https://www.cs.auckland.ac.nz/\~mike/zipattacks.pdf). The newer scheme for password-protecting zip files (with AES-256, rather than "ZipCrypto") does not have this weakness.
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From: [https://app.gitbook.com/@cpol/s/hacktricks/\~/edit/drafts/-LlM5mCby8ex5pOeV4pJ/forensics/basic-forensics-esp/zips-tricks](https://app.gitbook.com/s/-L\_2uGJGU7AVNRcqRvEi/)
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
|
|
|
|
Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
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Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
|
|
Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
|
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**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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