What is DarkGate?
DarkGate (S1111) is a versatile loader and Remote Access Trojan (RAT). It has sold on cybercrime forums since 2018. Attackers use it as an initial access broker, meaning it secures a foothold in a network, then deploys ransomware or infostealers.
DarkGate is known for its evasion techniques. It arrives via phishing emails, Microsoft Teams messages, or malvertising. It uses heavily obfuscated AutoIt scripts to bypass antivirus. Once installed, it establishes a hidden Virtual Network Computing (hVNC) session. Attackers control the desktop silently. Meanwhile, the malware mines cryptocurrency and steals credentials.
How to Defend Against DarkGate?
Defending against DarkGate requires email security, script control, and network visibility.
- Restrict script execution. DarkGate relies on AutoIt and VBScript for installation. Block these scripts in particular.
- Secure collaboration tools. Limit Microsoft Teams communication with external domains. This prevents vishing and social engineering attacks.
- Deploy endpoint detection. Flag process hollowing. Watch for injection into legitimate processes like vbc.exe or RegAsm.exe. Monitor for suspicious LNK files in startup folders.
- Use network detection (NDR), like Lumu Defender. Identify C2 communication. DarkGate often uses non-standard ports (e.g., 2351) or specific HTTP patterns to exfiltrate data.
- Integrate threat intelligence. Use platforms like Lumu Maltiverse to automatically block known malicious domains and IPs associated with DarkGate distribution.
