Hash Cracking Workflow

Hash Cracking Workflow is a skill for Claude Code from allsmog/blackbox-claude-plugin. It costs 52 tokens per session (1,173 once invoked), scanned C, original, MIT.

A workflow for identifying password hashes and testing whether they can be recovered using password lists and cracking tools. A hash is a one-way-looking value commonly used to store or verify a password.

In plain words
What is it for?
It helps identify common hash formats, locate wordlists such as rockyou.txt, select hashcat modes, and run hashcat or John the Ripper during authorized password audits.
Why use it?
It gives a structured process for recognizing an unknown hash and choosing an appropriate test method instead of trying tools at random.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: positional $N argument.

Part of the blackbox-htb plugin — 17 skills, 11 commands, 9 agents shipped together

Good fit It helps identify common hash formats, locate wordlists such as rockyou.txt, select hashcat modes, and run hashcat or John the Ripper during authorized password audits.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/allsmog/blackbox-claude-plugin/hash-cracking
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add allsmog/blackbox-claude-plugin --skill hash-cracking
Clone the repo
git clone --depth 1 https://github.com/allsmog/blackbox-claude-plugin

Made for: Claude Code.

Or install blackbox-htb, the plugin that ships this one along with the rest of its 17 skills, 11 commands, 9 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Hash Cracking Workflow

README.md
[![agentmods](https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/hash-cracking.svg)](https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/hash-cracking)
Your own site
<a href="https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/hash-cracking"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/hash-cracking.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,173 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.01173
Opus 5 $0.00026 $0.00587
Sonnet 5 $0.00010 $0.00235
Haiku 4.5 $0.00005 $0.00117

Measured 8d ago against content hash 2cd084fd1735, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade C, and why

Hash Cracking Workflow scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

| Linux shadow | `cat /etc/shadow` |

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s "https://crackstation.net/crackstation-api.php?hash=<HASH>"
blackbox-htb/skills/hash-cracking/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hash Cracking Workflow

Step 1: Identify Hash Type

By Length

Length Possible Types
32 MD5, NTLM
40 SHA1
56 SHA224
64 SHA256
96 SHA384
128 SHA512

By Format

Format Type Hashcat Mode
$1$salt$hash md5crypt 500
$5$salt$hash sha256crypt 7400
$6$salt$hash sha512crypt 1800
$2a$, $2b$, $2y$ bcrypt 3200
$apr1$ Apache MD5 1600
$P$ or $H$ phpass (WordPress) 400

Tools

# hashid
hashid '<HASH>'
hashid -m '<HASH>'  # Show hashcat mode

# hash-identifier
hash-identifier

# haiti (more accurate)
haiti '<HASH>'

Step 2: Find Wordlist

Common Locations

# Kali/Parrot
ls /usr/share/wordlists/rockyou.txt 2>/dev/null
zcat /usr/share/wordlists/rockyou.txt.gz > /tmp/rockyou.txt 2>/dev/null

# SecLists
ls /usr/share/seclists/Passwords/

# Custom locations
ls ~/wordlists/ /opt/wordlists/ 2>/dev/null

Wordlist Priority

  1. rockyou.txt - 14M passwords, good coverage
  2. top-passwords-shortlist.txt - Quick check
  3. Custom company/target wordlist
  4. Rule-based mutations

Step 3: Crack with Hashcat

Common Modes

# MD5
hashcat -m 0 hash.txt /path/to/rockyou.txt

# NTLM (Windows)
hashcat -m 1000 hash.txt /path/to/rockyou.txt

# SHA1
hashcat -m 100 hash.txt /path/to/rockyou.txt

# SHA256
hashcat -m 1400 hash.txt /path/to/rockyou.txt

# sha512crypt ($6$)
hashcat -m 1800 hash.txt /path/to/rockyou.txt

# bcrypt
hashcat -m 3200 hash.txt /path/to/rockyou.txt

# Kerberoast
hashcat -m 13100 hash.txt /path/to/rockyou.txt

# AS-REP Roast
hashcat -m 18200 hash.txt /path/to/rockyou.txt

With Rules (Better Coverage)

hashcat -m <MODE> hash.txt wordlist.txt -r /usr/share/hashcat/rules/best64.rule

Check Cracked

hashcat -m <MODE> hash.txt --show

Step 4: Alternative - John the Ripper

# Auto-detect format
john hash.txt --wordlist=/path/to/rockyou.txt

# Specific format
john --format=raw-md5 hash.txt --wordlist=/path/to/rockyou.txt
john --format=nt hash.txt --wordlist=/path/to/rockyou.txt

# Show cracked
john hash.txt --show

Read the full file on GitHub · 171 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 171 lines · 52 tokens per session scan C 2cd084fd1735

Subscribe to this mod's changes

Hash Cracking Workflow is a skill published in the GitHub repository allsmog/blackbox-claude-plugin (5 stars, last pushed 6mo ago), licensed MIT. It adds 52 tokens to every session and 1,173 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (reaches for credential files, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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