cerbersyslock

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—TerraBytefiles@scryptmail.com—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.