analyzing-ransomware-payment-wallets

analyzing-ransomware-payment-wallets is a skill for Claude Code from 26zl/cybersec-toolkit. It costs 76 tokens per session (1,643 once invoked), scanned A, original, MIT.

A cryptocurrency-forensics workflow for tracing ransomware payments on public blockchains. It follows wallet addresses, groups related wallets, and tracks funds through services such as mixers and exchanges.

In plain words
What is it for?
Use it to investigate ransom payments, follow Bitcoin transactions, identify wallet reuse, support campaign attribution, and prepare evidence for legal, compliance, insurance, or law-enforcement work.
Why use it?
A ransom wallet address alone does not show where the money went. Tracing transactions can reveal payment paths and help connect wallets or campaigns without contacting the attackers.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: positional $N argument.

Part of the cybersec-toolkit plugin — 197 skills, 2 hooks, 1 MCP server shipped together

Good fit Use it to investigate ransom payments, follow Bitcoin transactions, identify wallet reuse, support campaign attribution, and prepare evidence for legal, compliance, insurance, or law-enforcement work.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets
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 26zl/cybersec-toolkit --skill analyzing-ransomware-payment-wallets
Clone the repo
git clone --depth 1 https://github.com/26zl/cybersec-toolkit

Made for: Claude Code.

Or install cybersec-toolkit, the plugin that ships this one along with the rest of its 197 skills, 2 hooks, 1 MCP server.

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 analyzing-ransomware-payment-wallets

README.md
[![agentmods](https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets/github.svg)](https://agentmods.dev/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets)
Your own site
<a href="https://agentmods.dev/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets"><img src="https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets/github.svg" alt="Measured on agentmods" height="20"></a>

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agentmods 80×15 button for analyzing-ransomware-payment-wallets

Your own site · 80×15
<a href="https://agentmods.dev/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets"><img src="https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/analyzing-ransomware-payment-wallets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,643 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00076 $0.01643
Opus 5 $0.00038 $0.00822
Sonnet 5 $0.00015 $0.00329
Haiku 4.5 $0.00008 $0.00164

Measured 6d ago against content hash 0db0ef5d9740, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

analyzing-ransomware-payment-wallets scanned grade A with 1 finding 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 6d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/agent.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

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

resp = requests.get(url, timeout=30)
Origin

Copies of this mod

3 near-identical copies found in the catalogue:

.claude/skills/analyzing-ransomware-payment-wallets/SKILL.md · 179 lines

How it starts

The opening of the file, as written. The whole thing — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Analyzing Ransomware Payment Wallets

When to Use

  • An organization has been hit by ransomware and the ransom note contains a Bitcoin or cryptocurrency wallet address that needs investigation
  • Law enforcement or incident responders need to trace where ransom payments flowed after the victim paid
  • Threat intelligence analysts are attributing ransomware campaigns by clustering payment infrastructure across incidents
  • Investigators need to determine if a ransomware group is reusing wallet infrastructure across multiple victims
  • Compliance or legal teams need evidence of fund flows for prosecution, sanctions enforcement, or insurance claims

Do not use this skill for live payment interception or to interact directly with ransomware operators. All analysis should be passive and read-only against public blockchain data.

Prerequisites

  • Python 3.8+ with requests, json, and hashlib libraries
  • Access to blockchain explorer APIs (blockchain.com, WalletExplorer.com, Blockstream.info)
  • Familiarity with Bitcoin transaction model (UTXOs, inputs, outputs, change addresses)
  • Understanding of common obfuscation techniques (mixers, tumblers, peel chains, cross-chain swaps)
  • Optional: Chainalysis Reactor license for enterprise-grade cluster analysis
  • Optional: OXT.me for advanced transaction graph visualization

Workflow

Step 1: Extract Wallet Address from Ransom Note

Parse the ransom note to identify the payment address(es):

Common address formats:
  Bitcoin (P2PKH):   1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa  (starts with 1)
  Bitcoin (P2SH):    3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy  (starts with 3)
  Bitcoin (Bech32):  bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq (starts with bc1)
  Monero:            4... (95 characters, much harder to trace)
  Ethereum:          0x... (40 hex chars)

Step 2: Query Blockchain Explorer for Transaction History

Retrieve all transactions associated with the wallet:

import requests

def get_wallet_transactions(address):
    """Query blockchain.com API for address transactions."""
    url = f"https://blockchain.info/rawaddr/{address}"
    resp = requests.get(url, timeout=30)
    resp.raise_for_status()
    data = resp.json()
    return {
        "address": address,
        "n_tx": data.get("n_tx", 0),
        "total_received_satoshi": data.get("total_received", 0),
        "total_sent_satoshi": data.get("total_sent", 0),
        "final_balance_satoshi": data.get("final_balance", 0),
        "transactions": data.get("txs", []),
    }

Read the full file on GitHub · 179 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 179 lines · 76 tokens per session scan A 0db0ef5d9740

Subscribe to this mod's changes

analyzing-ransomware-payment-wallets is a skill published in the GitHub repository 26zl/cybersec-toolkit (51 stars, last pushed 2d ago), licensed MIT. It adds 76 tokens to every session and 1,643 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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