Kimwolf v7: An Evolution of the Kimwolf Botnet

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We identified a new version (v7) of the Kimwolf Android/internet-of-things (IoT) botnet. This version upgrades its distributed denial-of-service (DDoS) attack capabilities and the resilience of its command-and-control (C2) infrastructure. Kimwolf primarily affects Android TV boxes and set-top boxes.

Kimwolf v7 adds an HTTP/2-based DDoS flood that constructs complete browser fingerprints. This makes attack traffic more difficult to distinguish from legitimate browsing.

The threat’s binary includes five hard-coded public Ethereum-based endpoints for resolving Ethereum Name Service (ENS) domains. ENS is a blockchain-based naming system used to obtain C2 addresses.

Kimwolf also carries a hard-coded Tor .onion hidden service as a backup and a local proxy architecture for flexible routing between clearnet and Tor. The malware developers added this function to directly respond to C2 server takedown efforts in December 2025.

We discovered this variant on Feb. 3, 2026, through threat hunting that followed public disclosures by XLab, Synthient, Infoblox, Cloudflare and others.

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The Kimwolf botnet (also tracked as AISURU) has been active since August 2024. It initially targeted Linux IoT devices under the AISURU name. The botnet transitioned to Android TV boxes around August 2025.

This reflects two separate codebases under the same operators. AISURU covers the Linux IoT variants, and Kimwolf covers variants targeting Android.