Analyzing Ransomware Leak Site Intelligence

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

Trigger phrases:

• "analyzing ransomware leak site intelligence"

• "Monitor and analyze ransomware group data leak sites (DLS) to track victim posti"

• 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

This section covers key concepts for analyzing ransomware leak site intelligence.

• Ensure all prerequisites are met before proceeding
• Follow the documented workflow steps in sequence
• Record results and any anomalies encountered during this phase

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).

Safe Collection Practices

Never directly access DLS sites in a production environment. Use purpose-built monitoring services (Ransomwatch, DarkFeed, KELA, Flashpoint), Tor-isolated research VMs, commercial threat intelligence platforms, or community-maintained datasets. All analysis should be conducted in isolated environments with proper authorization.

Workflow

1. Scope the task — define objectives, boundaries, and success criteria
2. Gather information — collect all necessary data and context before proceeding
3. Execute the core workflow — follow the domain-specific steps methodically
4. Validate results — verify outputs against expected outcomes or baselines
5. Document findings — record results, anomalies, and recommendations

Step 1: Ingest Ransomware Leak Site Data from Public Feeds

import requests
import json
import pandas as pd
from datetime import datetime, timedelta
from collections import Counter

class RansomwareIntelCollector:
    """Collect ransomware DLS intelligence from public tracking sources."""

    RANSOMWATCH_API = "https://raw.githubusercontent.com/joshhighet/ransomwatch/main/posts.json"
    RANSOMWATCH_GROUPS = "https://raw.githubusercontent.com/joshhighet/ransomwatch/main/groups.json"

    def __init__(self):
        self.posts = []
        self.groups = []

    def fetch_ransomwatch_data(self):
        """Fetch ransomware victim posts from ransomwatch."""
        resp = requests.get(self.RANSOMWATCH_API, timeout=30)
        if resp.status_code == 200:
            self.posts = resp.json()
            print(f"[+] Loaded {len(self.posts)} victim posts from ransomwatch")
        else:
            print(f"[-] Failed to fetch posts: {resp.status_code}")

        resp = requests.get(self.RANSOMWATCH_GROUPS, timeout=30)
        if resp.status_code == 200:
            self.groups = resp.json()
            print(f"[+] Loaded {len(self.groups)} ransomware group profiles")

        return self.posts

    def get_recent_victims(self, days=30):
        """Get victims posted in the last N days."""
        cutoff = datetime.now() - timedelta(days=days)
        recent = []
        for post in self.posts:
            try:
                discovered = datetime.fromisoformat(
                    post.get("discovered", "").replace("Z", "+00:00")
                )
                if discovered.replace(tzinfo=None) >= cutoff:
                    recent.append(post)
            except (ValueError, TypeError):
                continue
        print(f"[+] {len(recent)} victims in last {days} days")
        return recent

    def get_group_activity(self, group_name):
        """Get all posts by a specific ransomware group."""
        group_posts = [
            p for p in self.posts
            if p.get("group_name", "").lower() == group_name.lower()
        ]
        print(f"[+] {group_name}: {len(group_posts)} total victims")
        return group_posts

collector = RansomwareIntelCollector()
collector.fetch_ransomwatch_data()
recent = collector.get_recent_victims(days=30)

Step 2: Analyze Group Activity and Trends

def analyze_group_trends(posts, top_n=15):
    """Analyze ransomware group activity trends."""
    group_counts = Counter(p.get("group_name", "unknown") for p in posts)
    monthly_activity = {}

    for post in posts:
        try:
            date = datetime.fromisoformat(
                post.get("discovered", "").replace("Z", "+00:00")
            )
            month_key = date.strftime("%Y-%m")
            group = post.get("group_name", "unknown")
            if month_key not in monthly_activity:
                monthly_activity[month_key] = Counter()
            monthly_activity[month_key][group] += 1
        except (ValueError, TypeError):
            continue

    analysis = {
        "total_posts": len(posts),
        "unique_groups": len(group_counts),
        "top_groups": group_counts.most_common(top_n),
        "monthly_totals": {
            month: sum(counts.values())
            for month, counts in sorted(monthly_activity.items())
        },
        "monthly_top_groups": {
            month: counts.most_common(5)
            for month, counts in sorted(monthly_activity.items())
        },
    }

    print(f"\n=== Ransomware Group Activity ===")
    print(f"Total victims tracked: {analysis['total_posts']}")
    print(f"Active groups: {analysis['unique_groups']}")
    print(f"\nTop {top_n} Groups:")
    for group, count in analysis["top_groups"]:
        print(f"  {group}: {count} victims")

    return analysis

trends = analyze_group_trends(collector.posts)

Step 3: Sector and Geographic Risk Assessment

def assess_sector_risk(posts, target_sector=None, target_country=None):
    """Assess ransomware risk for specific sector or geography."""
    sector_data = {}
    country_data = {}

    for post in posts:
        # Extract sector if available (not all feeds include this)
        sector = post.get("sector", post.get("industry", "unknown"))
        country = post.get("country", "unknown")

        if sector not in sector_data:
            sector_data[sector] = {"count": 0, "groups": Counter(), "recent": []}
        sector_data[sector]["count"] += 1
        sector_data[sector]["groups"][post.get("group_name", "")] += 1

        if country not in country_data:
            country_data[country] = {"count": 0, "groups": Counter()}
        country_data[country]["count"] += 1
        country_data[country]["groups"][post.get("group_name", "")] += 1

    # Sector risk scoring
    total = len(posts)
    risk_assessment = {
        "total_victims": total,
        "sectors": {},
        "countries": {},
    }

    for sector, data in sorted(sector_data.items(), key=lambda x: -x[1]["count"]):
        pct = (data["count"] / total * 100) if total > 0 else 0
        risk_assessment["sectors"][sector] = {
            "victim_count": data["count"],
            "percentage": round(pct, 1),
            "top_groups": data["groups"].most_common(5),
            "risk_level": (
                "critical" if pct > 15
                else "high" if pct > 8
                else "medium" if pct > 3
                else "low"
            ),
        }

    for country, data in sorted(country_data.items(), key=lambda x: -x[1]["count"]):
        pct = (data["count"] / total * 100) if total > 0 else 0
        risk_assessment["countries"][country] = {
            "victim_count": data["count"],
            "percentage": round(pct, 1),
            "top_groups": data["groups"].most_common(5),
        }

    return risk_assessment

risk = assess_sector_risk(collector.posts)

Step 4: Track Emerging and Rebranding Groups

def track_new_groups(posts, lookback_days=90):
    """Identify newly emerged ransomware groups."""
    group_first_seen = {}
    for post in posts:
        group = post.get("group_name", "")
        try:
            date = datetime.fromisoformat(
                post.get("discovered", "").replace("Z", "+00:00")
            )
            if group not in group_first_seen or date < group_first_seen[group]["first_seen"]:
                group_first_seen[group] = {
                    "first_seen": date,
                    "first_victim": post.get("post_title", ""),
                }
        except (ValueError, TypeError):
            continue

    cutoff = datetime.now() - timedelta(days=lookback_days)
    new_groups = {
        group: info for group, info in group_first_seen.items()
        if info["first_seen"].replace(tzinfo=None) >= cutoff
    }

    # Count total victims per new group
    for group in new_groups:
        victims = [p for p in posts if p.get("group_name") == group]
        new_groups[group]["total_victims"] = len(victims)
        new_groups[group]["avg_per_month"] = round(
            len(victims) / max(1, lookback_days / 30), 1
        )

    print(f"\n=== New Groups (last {lookback_days} days) ===")
    for group, info in sorted(new_groups.items(), key=lambda x: -x[1]["total_victims"]):
        print(f"  {group}: {info['total_victims']} victims, "
              f"first seen {info['first_seen'].strftime('%Y-%m-%d')}")

    return new_groups

new_groups = track_new_groups(collector.posts, lookback_days=90)

Step 5: Generate Intelligence Report

def generate_ransomware_intel_report(trends, risk, new_groups):
    """Generate ransomware threat intelligence report."""
    report = f"""# Ransomware Threat Intelligence Report
Generated: {datetime.now().isoformat()}

## Executive Summary
- **Total victims tracked**: {trends['total_posts']}
- **Active ransomware groups**: {trends['unique_groups']}
- **New groups (last 90 days)**: {len(new_groups)}

## Top Active Groups
| Rank | Group | Victims |
|------|-------|---------|
"""
    for i, (group, count) in enumerate(trends["top_groups"][:10], 1):
        report += f"| {i} | {group} | {count} |\n"

    report += "\n## New Emerging Groups\n"
    for group, info in sorted(new_groups.items(), key=lambda x: -x[1]["total_victims"])[:10]:
        report += f"- **{group}**: {info['total_victims']} victims since {info['first_seen'].strftime('%Y-%m-%d')}\n"

    report += "\n## Sector Risk Assessment\n"
    report += "| Sector | Victims | % | Risk Level |\n|--------|---------|---|------------|\n"
    for sector, data in list(risk["sectors"].items())[:10]:
        report += f"| {sector} | {data['victim_count']} | {data['percentage']}% | {data['risk_level'].upper()} |\n"

    report += """
## Recommendations
1. Monitor DLS feeds daily for your organization and supply chain partners
2. Prioritize patching vulnerabilities exploited by top active groups
3. Implement offline backup strategy to reduce extortion leverage
4. Conduct tabletop exercises for ransomware scenario response
5. Share indicators with sector ISACs and threat sharing communities
"""
    with open("ransomware_intel_report.md", "w") as f:
        f.write(report)
    print("[+] Report saved: ransomware_intel_report.md")
    return report

generate_ransomware_intel_report(trends, risk, new_groups)

Validation Criteria

• Ransomware victim data ingested from public tracking feeds
• Group activity trends analyzed with monthly breakdowns
• Sector and geographic risk assessment produced
• New and emerging groups identified with activity metrics
• Intelligence report generated with actionable recommendations
• All collection conducted through authorized public sources

When NOT to Use

• You need to perform the attack, not analyze it (use performing-* skills)
• Task is about detection, not analysis (use detecting-* skills)
• You need to implement controls (use implementing-* skills)
• Task is about threat hunting, not post-incident analysis (use hunting-* skills)
• You don't have access to the artifacts/logs to analyze
• Task requires real-time monitoring (use SOC tools)

Red Flags

• Performing actions without explicit written authorization from the asset owner
• Testing against production systems without a defined scope and rules of engagement
• Acting on threat intelligence without validating source reliability
• Sharing classified or sensitive indicators without proper handling procedures
• Alerting threat actors to detection capabilities through visible response actions

Verification

• All steps executed successfully against a test environment before production use
• Output documented with screenshots or logs demonstrating expected behavior
• Results validated against known-good baselines or reference implementations
• Documentation complete enough for another analyst to reproduce findings

References

• Ransomwatch GitHub
• SOCRadar: Top Ransomware Statistics 2025
• Bitsight: Ransomware & Deep Web Trends
• Sophos: Threat Intelligence Report 2025
• H-ISAC: Ransomware Data Leak Sites Report
• CYFIRMA: Weekly Intelligence Reports

Process

1. Analyze the task requirements
2. Apply domain expertise
3. Verify output quality

Anti-Rationalization Table