analyzing-ransomware-leak-site-intelligence

analyzing-ransomware-leak-site-intelligence is a skill for Claude Code from 26zl/cybersec-toolkit. It costs 46 tokens per session (3,170 once invoked), scanned A, original, MIT.

A procedure for monitoring ransomware data-leak sites, where ransomware groups publish victim names or stolen-data samples to pressure payment. It turns those observations into structured threat intelligence and sector-specific risk assessments.

In plain words
What is it for?
It is for collecting leak-site information, tracking victim and group activity, supporting threat hunting, and assessing ransomware risk by sector.
Why use it?
It helps security teams understand which groups are active, who they target, and how their tactics and risks are changing.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

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

Good fit It is for collecting leak-site information, tracking victim and group activity, supporting threat hunting, and assessing ransomware risk by sector.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/26zl/cybersec-toolkit/analyzing-ransomware-leak-site-intelligence
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-leak-site-intelligence
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-leak-site-intelligence

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

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for analyzing-ransomware-leak-site-intelligence

Your own site · 80×15
<a href="https://agentmods.dev/skills/26zl/cybersec-toolkit/analyzing-ransomware-leak-site-intelligence"><img src="https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/analyzing-ransomware-leak-site-intelligence.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,170 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 $0.00046 $0.03170
Opus 5 $0.00023 $0.01585
Sonnet 5 $0.00009 $0.00634
Haiku 4.5 $0.00005 $0.00317

Measured 8d ago against content hash 2f1695d5bb92, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

analyzing-ransomware-leak-site-intelligence 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 8d 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(self.RANSOMWATCH_API, timeout=30)
Origin

Copies of this mod

4 near-identical copies found in the catalogue:

.claude/skills/analyzing-ransomware-leak-site-intelligence/SKILL.md · 345 lines

How it starts

The opening of the file, as written. The whole thing — 345 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Analyzing Ransomware Leak Site Intelligence

Overview

Ransomware groups operating under double-extortion models maintain data leak sites (DLS) on Tor hidden services where they post victim names, stolen data samples, and countdown timers to pressure payment. In H1 2025, 96 unique ransomware groups were active, listing approximately 535 victims per month. Monitoring these sites provides intelligence on active threat groups, targeted sectors, geographic patterns, and emerging ransomware families. This skill covers safely collecting DLS intelligence, extracting structured data, tracking group activity trends, and producing sector-specific risk assessments.

When to Use

  • When investigating security incidents that require analyzing ransomware leak site intelligence
  • When building detection rules or threat hunting queries for this domain
  • When SOC analysts need structured procedures for this analysis type
  • When validating security monitoring coverage for related attack techniques

Prerequisites

  • Python 3.9+ with requests, beautifulsoup4, pandas, matplotlib libraries
  • Tor proxy (SOCKS5) for accessing .onion sites or commercial DLS monitoring feeds
  • Understanding of ransomware double-extortion business model
  • Familiarity with major ransomware families (Qilin, Akira, LockBit, BlackCat, Clop)
  • Access to ransomware tracking feeds (Ransomwatch, RansomLook, DarkFeed)

Key Concepts

Double Extortion Model

Modern ransomware groups encrypt victim data AND exfiltrate it before encryption. Leak sites serve as public pressure: victims are listed with a countdown timer, partial data samples, and file trees. If ransom is not paid, full data is published. Some groups have moved to triple extortion, adding DDoS threats or contacting victims' customers directly.

DLS Intelligence Value

Leak sites provide: victim identification (company name, sector, country), attack timeline (when listed, deadline, data published), data volume estimates, group capability assessment (sectors targeted, attack frequency, operational tempo), and trend analysis (new groups emerging, groups rebranding, law enforcement takedowns).

Read the full file on GitHub · 345 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. 8d ago First seen · 345 lines · 46 tokens per session scan A 2f1695d5bb92

Subscribe to this mod's changes

analyzing-ransomware-leak-site-intelligence is a skill published in the GitHub repository 26zl/cybersec-toolkit (54 stars, last pushed yesterday), licensed MIT. It adds 46 tokens to every session and 3,170 once invoked, about $0.0002 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.

Related

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analyzing-ransomware-leak-site-intelligence

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Monitor and analyze ransomware group data leak sites (DLS) to track victim postings, extract threat intelligence on group tactics, and assess sector-specific ransomware risk for proactive defense.

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Monitor and analyze ransomware group data leak sites (DLS) to track victim postings, extract threat intelligence on group tactics, and assess sector-specific ransomware risk for proactive defense.

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Monitor and analyze ransomware group data leak sites (DLS) to track victim postings, extract threat intelligence on group tactics, and assess sector-specific ransomware risk for proactive defense.

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