Cerbersyslock ransomware group
Cerbersyslock is one of the extortion operations we watch continuously. This page covers what is known about the group and the current state of its leak site.
Who they are
CerBerSysLock first appeared in December 2017 as a cryptoransomware imposter, leveraging Cerber-style branding to deceive victims. It uses XOR-based encryption to lock files and appends extensions such as .CerBerSysLocked0009881. Victims receive a ransom note titled “HOW TO DECRYPT FILES.txt”, which falsely claims to be from the Cerber ransomware. The note includes an email contact—[email protected]—and instructs victims to reference their ID (e.g., "CerBerSysLocked0009881") when communicating. The ransomware is technically linked to the Xorist family and is generally considered an opportunistic, low-profile scam rather than part of a broader Ransomware-as-a-Service (RaaS) operation.
Current status
Cerbersyslock's leak site is not answering. Sites go dark for infrastructure trouble, a deliberate quiet period, or a takedown, and a good number return weeks later under the same name, so the entry stays on the list either way.
Which organisations this group has named, and when, is part of the SINON platform rather than this page. Create an account to search it, or to be told automatically if a name you care about turns up.
Sectors targeted
This group does not state an industry on its site, so we have nothing reliable to report. Most crews are opportunistic rather than sector-specific in any case — they hit what they can reach.
Watching for your name
If Cerbersyslock posts your company, a supplier or a subsidiary, you want to hear it from us rather than from a journalist. SINON checks these sites continuously and alerts on the names you give it.
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