Ransomware Research
PClock4 Ransomware
PClock4 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2016, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: PClock4, SysGop.
Quick Facts
- Ransomware Family
- PClock4
- First Seen
- December 1, 2016
- Known Aliases
- PClock4SysGop
How PClock4 Ransomware Works
Targeted Files
Requires C&C
Ransom Note and Payment Demands
After encrypting files, PClock4 displays ransom notes demanding payment for file recovery:
/^Your files are locked !{1,5}\.txt\b/Ransom message:
notes/Your files are locked !!!!.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with PClock4 ransomware:
sysgop.exetmp9602.exe
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About This Analysis
This PClock4 ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like PClock4.
Last updated: July 30, 2025