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Interlock Ransomware Targets FreeBSD, Threatens Infrastructure

  • Last updated November 8, 2024
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Detroit, November 4, 2024 — Interlock ransomware targets FreeBSD servers, threatening vital infrastructure. Wayne County hit; million-dollar ransoms demanded. 

The cybersecurity landscape faces a fresh menace as the Interlock ransomware emerges, targeting FreeBSD servers and endangering vital infrastructure worldwide. Launching in late September, this ransomware strain has disrupted operations in at least six organizations, with Wayne County, Michigan among its notable victims.

Unlike the typical ransomware assaults that focus on Linux or Windows systems, Interlock’s creation of a FreeBSD-specific encryptor signals a strategic shift, emphasizing how critical infrastructure and widely used server platforms are becoming prime targets. Trend Micro researchers underscore the threat:

The operation’s double-extortion model is particularly concerning. Cybercriminals breach networks, exfiltrate sensitive data, and then encrypt it, threatening public disclosure if ransoms—ranging from hundreds of thousands to millions of dollars—remain unpaid. Each attack includes a tailored ransom note, named !README!.txt, that directs victims to a Tor-based negotiation site.

Incident responder Simo first spotlighted the operation, identifying a backdoor used by Interlock. MalwareHuntTeam later discovered an ELF encryptor confirming it was compiled specifically for FreeBSD 10.4. Despite the platform’s niche in ransomware activity, the only known precedent was the now-defunct Hive operation, disrupted in 2023 by the FBI.

As ransomware sophistication escalates, experts warn of the broader implications. Interlock’s bold focus on FreeBSD signals a shift in ransomware tactics that could set unsettling new trends.


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