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Introduction:
The takedown of BreachForums in 2023 did not erase the underground marketplace; it catalysed a toxic fragmentation, spawning rival heirs and rogue clones battling for control of stolen data trade. This ongoing power struggle, detailed by Damien Bancal on ZATAZ Magazine, illustrates how law enforcement victories can paradoxically multiply threat vectors, forcing defenders to track multiple forum iterations, each with unique infrastructure, trust models, and exploit markets.
Learning Objectives:
- Identify the key factions and cloned platforms emerging from the BreachForums collapse using OSINT techniques.
- Deploy network-level detection rules and API scraping to monitor data leaks across fragmented dark web forums.
- Implement defensive playbooks to mitigate credential stuffing and leaked database risks originating from these splinter groups.
You Should Know:
- Mapping BreachForums Splinters: OSINT Reconnaissance & Forum Crawling
The original BreachForums (formerly RaidForums) operated via Tor hidden services. Post-seizure, at least three rival administrations emerged: “BreachForums 2.0” (by ShinyHunters affiliate), “BreachForums.vc” clone, and “Cracked.io” leveraging similar trust systems. To track them, we combine passive DNS enumeration, onion scanning, and forum API abuse.
Step‑by‑Step Guide (Linux):
1. Passive DNS enumeration for historical forum IPs:
`curl -s “https://securitytrails.com/list/apex_domain/breachforums.st” | grep -Eo ‘[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+’ | sort -u`
2. Onion scanner to discover new .onion addresses:
`sudo apt install torsocks onionprobe; torsocks onionprobe -t 60 http://breachforums[.]onion` (replace with current known onion)
3. Forum API extraction (if REST API exposed):
`curl -X GET “http://forum_clone.onion/api/threads?page=1” –proxy socks5h://127.0.0.1:9050 -H “User-Agent: Mozilla/5.0” | jq ‘.threads[] | {title, url, views}’`
Windows Alternative (PowerShell + Tor):
Start Tor service, then:
`Invoke-WebRequest -Uri “http://forum_clone.onion/api/latest_leaks” -Proxy “socks5://127.0.0.1:9050” -UseBasicParsing | Select-Object -ExpandProperty Content | ConvertFrom-Json | ForEach-Object { $_.leaks }`
What this does: It retrieves live threat intelligence from fragmented forums without direct web browsing. Use in isolated sandbox environments; never with personal credentials.
- Detecting Leaked Credentials from Fragmented Forums via YARA & Sigma
Each splinter forum releases distinct data packs (combos, fullz, RDP lists). Defenders must build custom signatures to identify shared patterns. Below is a YARA rule to detect BreachForums-style combo dump headers.
YARA Rule (`breach_detector.yar`):
rule BreachForums_Combo_Header {
meta:
description = "Detects typical BreachForums combo file headers"
author = "Undercode SOC"
strings:
$h1 = /[email]:[password]/ ascii
$h2 = /COMBO LIST FROM BREACHFORUMS/ nocase
$h3 = /domain|username|password/ ascii
$suffix = /.txt$/ wide
condition:
any of ($h1,$h2,$h3) and $suffix
}
Sigma Rule for Windows Event Logs (monitoring forum access attempts):
title: Suspicious Tor Browser Access to Known BreachForums Onions status: experimental logsource: product: windows service: security detection: selection: EventID: 5156 DestinationPort: 9050 ProcessName: 'tor.exe' DestinationIp: '.onion' Placeholder – real detection uses DNS queries condition: selection
Step‑by‑Step Deployment (Windows):
1. Install Sigma CLI: `pip install sigmatools`
- Convert rule to Sysmon config: `sigma convert -t windows -p sysmon breach_sigma.yml`
3. Load into Sysmon via `sysmon -c breach_config.xml`
Mitigation: Block Tor exit nodes at perimeter firewall using IP sets.
`iptables -A INPUT -m set –match-set tor_exit_nodes src -j DROP` (Linux)
`New-NetFirewallRule -DisplayName “Block Tor” -Direction Inbound -RemoteAddress (Get-Content tor_exit_nodes.txt) -Action Block` (PowerShell admin)
- API Security Hardening Against Credential Stuffing from Leaked Combos
Fragmented forums often release combo lists containing millions of real credentials. To prevent reuse, implement API rate limiting and anomaly detection using Redis sliding windows.
Linux Nginx + Lua rate limiting:
-- limit_by_login.lua local login_key = "rate:" .. ngx.var.remote_user local limit = 5 -- 5 attempts local expire = 60 -- per minute local current = redis:incr(login_key) if current == 1 then redis:expire(login_key, expire) end if current > limit then ngx.exit(429) end
Windows IIS + Dynamic IP Restrictions:
Install `Web-Scripting-Tools`, then via PowerShell:
`Add-WebConfigurationProperty -Filter “system.webServer/security/dynamicIpSecurity” -Name “.” -Value @{denyAction=”Unauthorized”; enableProxyMode=$true}`
Step‑by‑Step Cloud Hardening (AWS WAF):
1. Export leaked combo list to S3.
- Create Lambda function that hashes credentials and updates WAF rule group.
- Deploy rate‑based rule: `RateLimit 1000 over 5 minutes` + custom response “Credential stuffing detected”.
Tutorial – Simulate stuffing attack from forum dump:
`hydra -L emails.txt -P passwords.txt https://target.com/login -V -f` (use only on your own test environment)
- Automating Leak Monitoring with Python + Telegram Bot (Defender Use)
Create a crawler that scrapes new posts from three known BreachForums clones and alerts via Telegram.
Python script (`breach_watcher.py`):
import requests, telebot, time
from stem import Signal
from stem.control import Controller
TOKEN = "YOUR_BOT_TOKEN"
bot = telebot.TeleBot(TOKEN)
def renew_tor_ip():
with Controller.from_port(port=9051) as controller:
controller.authenticate(password="your_password")
controller.signal(Signal.NEWNYM)
urls = ["http://breachforums2.onion/latest", "http://clonevc.onion/leaks"]
seen = set()
while True:
for url in urls:
renew_tor_ip()
proxies = {'http':'socks5h://127.0.0.1:9050','https':'socks5h://127.0.0.1:9050'}
try:
r = requests.get(url, proxies=proxies, timeout=15)
for line in r.text.splitlines():
if "new leak" in line.lower() and line not in seen:
bot.send_message("@your_channel", f"Alert: {line}")
seen.add(line)
except: pass
time.sleep(3600)
Windows Scheduled Task: Run script every hour using Task Scheduler. Action: `C:\Python39\python.exe breach_watcher.py`
5. Vulnerability Exploitation Mitigation – Patching Against Forum-Discussed 0-days
BreachForums splinters often host proof-of-concept exploits. Monitor for specific CVEs mentioned in forum titles. Example: CVE-2024-6387 (OpenSSH signal race) – patch immediately.
Linux Remediation:
Check SSH version ssh -V Upgrade OpenSSH (Ubuntu/Debian) sudo apt update && sudo apt upgrade openssh-server Verify patch: version >= 9.8p1
Windows Remediation (for OpenSSH for Windows):
Get-WindowsCapability -Online | Where-Object Name -like 'OpenSSH.Server' Install latest via Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
Hardening Configuration:
`/etc/ssh/sshd_config`:
`MaxAuthTries 3`
`LoginGraceTime 30`
`AllowUsers [specific group]`
Then `sudo systemctl restart sshd`
Firewall rule to block known malicious forum IPs (feed from AbuseIPDB):
`curl -s “https://api.abuseipdb.com/api/v2/blacklist?count=1000” -H “Key: YOUR_KEY” | grep -Eo ‘[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+’ | xargs -I {} iptables -A INPUT -s {} -j DROP`
6. Cloud Hardening Against Data Exfiltration – BreachForums Tradecraft
Fragmented forums share AWS/Azure key dumps. Implement key rotation and anomaly detection.
AWS CLI commands to rotate IAM keys:
`aws iam create-access-key –user-name compromised_user`
`aws iam update-access-key –access-key-id OLD_KEY –status Inactive`
`aws iam delete-access-key –access-key-id OLD_KEY`
CloudTrail detection for unusual download patterns:
-- Athena query SELECT eventtime, useridentity.arn, requestparameters, sourceipaddress FROM cloudtrail_logs WHERE eventsource = 's3.amazonaws.com' AND eventname = 'GetObject' AND sourceipaddress NOT IN (SELECT whitelist_ip FROM corp_network)
Step‑by‑Step GuardDuty custom finding:
- Create Lambda that parses forum combos for cloud credentials.
2. Feed to GuardDuty threat intel list.
3. Set auto-remediation to revoke keys upon match.
What Undercode Say:
- Fragmentation is the new persistence – Every takedown breeds 5 clones; defenders must shift from sinkhole to continuous monitoring with OSINT automation.
- Credential stuffing remains the 1 kill chain – Combos leaked on splinter forums enable ransomware within 72 hours. Enforce geo-blocking + strict rate limiting even on internal APIs.
The BreachForums saga proves that cybercrime ecosystems adapt faster than enforcement. Organizations must treat dark web forum monitoring as a 24/7 intelligence function, not a quarterly exercise. Open-source tools like OnionProbe, Sigma, and YARA give blue teams parity, but only if integrated into SIEM workflows. The toxic spiral will continue – your defence must spiral upwards, not sideways.
Prediction:
Within 12 months, AI‑driven forum splintering will automate clone creation using LLMs to rewrite forum software, bypassing hash-based detection. Defenders will rely on behavioural graph analysis of moderator relationships, not just domain blacklists. The next BreachForums iteration will likely move to decentralised I2P and Freenet, requiring new network forensics tooling. Prepare now by integrating I2P traffic inspection into your NDR solutions.
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Reported By: Piveteau Pierre – Hackers Feeds
Extra Hub: Undercode MoN
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