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Executive Summary
- Who/What is Maranhão Stealer.
- Why it is dangerous: info-stealing malware specializing in browser data, crypto wallets, and credentials.
- Emerging trends in 2025: malware-as-a-service (MaaS) and black markets.
Technical Deep Dive
- Infection vectors (phishing, malvertising, cracked software).
- Capabilities:
- Credential harvesting (browsers, FTP, VPNs).
- Crypto wallet theft (MetaMask, TrustWallet, Exodus).
- Data exfiltration via Telegram bots & C2 panels.
- Code obfuscation and evasion techniques.
- MITRE ATT&CK mapping.
Vulnerabilities & CVEs Exploited
- Known CVEs linked to exploitation campaigns (ex: Chrome, Edge, Office macros).
- 0-days chained with info-stealers.
- CVSS ranking + KEV status.
Global Impact
- Who is being targeted? SMBs, individual crypto traders, fintech users.
- Regional focus (Brazil/LatAm origin, but spreading globally).
- Scale of crypto theft attributed to this stealer.
Indicators of Compromise (IOCs)
- File hashes (sample binaries).
- Domains / IPs linked to Maranhão C2s.
- Telegram bot activity indicators.
- YARA rules for detection.
Mitigation & Defense
- Patch browsers, disable auto-downloads.
- Harden endpoint security (EDR, anti-stealer configs).
- Block suspicious Telegram C2 activity.
- SOC hunting queries.
Case Studies
- Crypto wallet drains.
- SMB compromises via cracked software.
- Link to larger malware distribution networks (like HijackLoader).
CyberDudeBivash Recommendations
- Deploy Zero Trust.
- Monitor browser/crypto processes for suspicious exfil.
- Use EDR + SOAR + Threat Intel feeds.
- Educate employees about malware-as-a-service lures.
Affiliate & Service CTAs
- Managed SOC/XDR
- Anti-ransomware/anti-stealer security suites
- Cybersecurity certification training
Conclusion
Maranhão Stealer represents a serious global data-theft threat in 2025.
CyberDudeBivash provides the intelligence needed to detect, block, and recover from such campaigns.
Branding
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