Cyber Risks · Unit 42 Palo Alto Networks

Monero Miners Continue to Plague Users via Russian Bit Torrent Site

Summary: A Russian BitTorrent site, b-tor[.]ru, has been bundling malware with legitimate files since September 2017, serving users a compressed .torrent.zip that unpacks to a double-extension .exe disguised with the uTorrent icon. Executing it downloads the expected torrent while silently installing a four-stage .NET chain that drops an XMRig Monero miner configured to use 100% of the victim's CPU.

Why it matters: The site hosts over 275,000 unique torrent files, and the miner, the dropper, and the XMRig proxy all resolve to a single IP address, 185.154.13[.]213, showing one actor running the whole operation end to end.

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Topics
Malware
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