Lumen Technologies’ Black Lotus Labs has successfully disrupted more than 550 command-and-control (C2) servers connected to the Aisuru and Kimwolf botnets, a large-scale malicious infrastructure widely used for distributed denial-of-service (DDoS) attacks and residential proxy abuse.
Aisuru operates as a DDoS-for-hire platform and deliberately avoids targeting government and military entities. However, broadband service providers have borne the brunt of its activity, with attacks surpassing 1.5Tb/sec originating from compromised customer devices, causing severe service interruptions.
Similar to other TurboMirai-based botnets, Aisuru includes enhanced DDoS capabilities alongside multifunctional features. These allow threat actors to engage in a range of illegal operations such as credential stuffing, AI-powered web scraping, spam campaigns, phishing attacks, and proxy services.
The botnet launches assaults using UDP, TCP, and GRE flood techniques, leveraging medium-sized packets with randomized ports and flags. Traffic volumes exceeding 1Tb/sec from infected customer premises equipment (CPEs) have disrupted broadband networks, while packet floods surpassing 4 billion packets per second have led to router line card failures.
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