Iranian APT MuddyWater Infiltrates U.S. Networks Using Dindoor Backdoor
In early February 2026, the Iranian state-sponsored hacking group MuddyWater (also known as Seedworm) infiltrated networks of multiple U.S. organizations, including a bank, an airport, and a software company with Israeli operations. The attackers deployed a previously unknown backdoor named Dindoor, which utilizes the Deno JavaScript runtime for execution. Additionally, they attempted data exfiltration using the Rclone utility to a Wasabi cloud storage bucket. The initial access methods remain unclear, but MuddyWater is known for using phishing emails and exploiting vulnerabilities in public-facing applications. ([thehackernews.com](https://thehackernews.com/2026/03/iran-linked-muddywater-hackers-target.html?utm_source=openai)) This incident underscores the evolving capabilities of Iranian threat actors, who have demonstrated improved tooling and social engineering tactics. The timing of these intrusions, coinciding with escalating geopolitical tensions following U.S. and Israeli military actions, highlights the potential for cyber operations to serve as instruments of state power during periods of conflict. ([thehackernews.com](https://thehackernews.com/2026/03/iran-linked-muddywater-hackers-target.html?utm_source=openai))
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