MuddyWater Deploys UDPGangster Backdoor via Spear-Phishing Campaigns
The Iranian state-linked threat actor MuddyWater has launched a cyber espionage campaign targeting organizations in Turkey, Israel, and Azerbaijan using a new backdoor named UDPGangster. This malware leverages the User Datagram Protocol (UDP) for command-and-control (C2) communications, enabling attackers to remotely control compromised systems, execute commands, exfiltrate files, and deploy additional payloads while evading traditional network defenses. The attack chain begins with spear-phishing emails impersonating government entities, such as the Turkish Republic of Northern Cyprus Ministry of Foreign Affairs, and includes malicious Microsoft Word documents that prompt users to enable macros, triggering the execution of the UDPGangster payload.
The VBA macro embedded in the malicious documents decodes Base64-encoded data and writes it to a file, which is then executed to launch the backdoor. UDPGangster establishes persistence through Windows Registry modifications and incorporates anti-analysis techniques to resist detection and analysis. The campaign demonstrates MuddyWater's continued evolution in using covert communication channels and sophisticated social engineering tactics to infiltrate targeted organizations in the Middle East region.
Timeline
Dec 8, 2025
UDPGangster backdoor deployed with covert UDP-based C2
Researchers reported that MuddyWater deployed a new backdoor named UDPGangster that uses the UDP protocol for covert command-and-control communications. The malware establishes persistence, performs anti-analysis checks, and can exfiltrate data, execute commands, and deliver additional payloads.
Dec 8, 2025
MuddyWater launches UDPGangster campaign targeting Turkey, Israel, and Azerbaijan
The Iran-linked threat actor MuddyWater was observed conducting a targeted campaign against users in Turkey, Israel, and Azerbaijan using spear-phishing emails impersonating official entities. The emails delivered malicious Word documents that required macro activation to begin the infection chain.
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