Since September 2024, Interlock ransomware actors have impacted a wide range of businesses and critical infrastructure sectors in North America and Europe.
These actors are opportunistic and financially motivated in nature and employ tactics to infiltrate and disrupt the victim’s ability to provide their essential services. Interlock actors leverage a double extortion model, in which they both encrypt and exfiltrate victim data. Ransom notes do not include an initial ransom demand or payment instructions; instead, victims are provided with a unique code and are instructed to contact the ransomware group via a .onion URL through the Tor browser. To date, Interlock actors have been observed encrypting VMs, leaving hosts, workstations, and physical servers unaffected; however, this does not mean they will not expand to these systems in the future.
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Source: U.S. Federal Bureau of Investigation Cyber Division
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