Android Debug Bridge

Palo Alto Networks Unit 42 Uncovers Kimwolf v7 Botnet Infecting Android Set-Top Boxes via Open ADB

Researchers at Palo Alto Networks Unit 42 have identified Kimwolf v7, an updated botnet that compromises Android set-top boxes and other IoT devices to conduct DDoS attacks. The malware now employs HTTP/2 flooding with realistic browser fingerprints to blend malicious traffic with legitimate user activity. Command-and-control infrastructure is hardened through Ethereum Name Service lookups and public Ethereum RPC services, with a Tor fallback address embedded in the binary. Operators have removed scanning, exploitation, and brute-force capabilities from this version, indicating a division of labor where a separate loader handles initial infection. The botnet uses 15 numbered methods focused on high-performance UDP floods optimized for ARM processors. Infections typically occur through residential proxies targeting devices with open Android Debug Bridge on port 5555, after which the malware masquerades as system processes. Unit 42 advises treating Android set-top boxes as untrusted devices and disabling ADB or restricting it to USB access only.