Understanding Infostealers
Infostealer malware silently harvests credentials, session tokens, cryptocurrency wallets, and personal data from infected systems. Unlike ransomware which announces itself, infostealers operate covertly, often going undetected for months.
Major Infostealer Families
RedLine Stealer
- Most prevalent infostealer in 2024-2026
- Targets: Browser credentials, cryptocurrency wallets, VPN sessions, FTP credentials
- Distribution: Malicious ads, cracked software, phishing
Raccoon Stealer (v2)
- Malware-as-a-Service model ($200/month)
- Targets: Browser data, email clients, cryptocurrency
- Distribution: SEO poisoning, fake software updates
Vidar
- Fork of Arkei stealer
- Targets: Browser data, 2FA applications, cryptocurrency wallets
- Notable: Configurable exfiltration targets
How Infostealers Work
1. Infection
Common delivery methods:- Malicious Google/Bing ads for popular software
- Cracked software and game cheats
- Phishing emails with macro-enabled documents
- YouTube video descriptions with "free tool" links
2. Data Collection
Once running, infostealers harvest:- Browser data: Saved passwords, cookies, autofill data, browsing history
- Session tokens: Authenticated sessions for cloud services
- Cryptocurrency: Wallet files, seed phrases, exchange sessions
- System info: OS version, hardware ID, installed software
- Files: Documents matching patterns (.txt, .doc containing "password")
3. Exfiltration
Data sent to attacker infrastructure:- Telegram bot API for quick exfiltration
- Discord webhooks
- Dedicated C2 servers
- Encrypted channels
4. Monetization
Stolen data sold on:- Russian Market, Genesis Market
- Telegram channels
- Dark web forums
- Pricing: $5-50 per "log" (one victim's data)
Detection and Prevention
Endpoint Detection
- Monitor for known infostealer behaviors
- Detect browser credential database access
- Alert on mass cookie/credential reading
- Block known C2 communications
Credential Hygiene
- Don't save passwords in browsers (use a password manager)
- Enable MFA on all accounts
- Monitor for credential exposure in dark web
- Regular session invalidation
Where SuperClue Fits
SuperClue checks breach databases through HaveIBeenPwned for exposed accounts on your domain, and its SOC agent watches processes and network connections on your endpoints. It does not crawl dark web markets.