Fake Claude AI Website Distributes Beagle Backdoor Malware via Malvertising Campaign

Researchers identified a malvertising campaign distributing a previously undocumented backdoor named Beagle via a fake Claude AI website. The attack leverages fraudulent advertisements to lure users into downloading malicious software disguised as the legitimate AI service developed by Anthropic. The Beagle malware operates as a backdoor, though specific technical mechanisms or command-and-control infrastructure details were not disclosed. No exact timeline, affected user count, or geographic targeting was provided in the report. The campaign highlights the use of AI-themed lures to exploit user trust in emerging technologies. The discovery underscores the growing trend of threat actors abusing popular AI platforms for malware distribution.