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tools-hashcat

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Crack password hashes offline with hashcat (GPU) and John the Ripper (CPU) — hash-mode selection, attack modes (straight/mask/combinator/rules), the -m type table, *2john extractors, and potfile discipline. Load when loot includes hashes: NTLM/NetNTLMv2 dumps, Kerberos TGS (kerberoast), JWT secrets, /etc/shadow, zip/rar/ssh key passwords. Signals: hashcat -m, rockyou, best64.rule, $6$ hashes, unshadow, john --show, mask ?a?a?a.

skills/tools/tools-hashcat/SKILL.md

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Last checked
Nov 11, 2026

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27
Repository last updated
Oct 14, 2026
License
MIT

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# hashcat & John hash cracking

## When it applies
You hold in-scope credential material (`tradecraft-scope-roe`) that must be proven crackable: NTLM
dumps, NetNTLMv2 captures (`network-credential-cracking`), Kerberos TGS tickets (`ad-kerberoasting`),
JWT HMAC secrets (`web-auth-jwt`), `/etc/shadow`, or password-protected archives/keys. In defense
mode, the same workflow audits whether org passwords survive a real cracking run.

## Why it works
Offline cracking has no lockout and no rate limit — speed is set by hash algorithm and hardware.
hashcat drives GPUs (billions of guesses/sec on fast hashes like NTLM); John the Ripper is the
flexible CPU fallback with extractors (`*2john`) that turn encrypted files into crackable hashes.
Rules and masks exploit how humans actually pick passwords, so a small wordlist + mutation beats
blind brute force.
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