Ransomware Research
ProLock Ransomware
ProLock is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ProLock
- First Seen
- March 1, 2020
How ProLock Ransomware Works
Targeted Files
Skips 0x6000 bytes Encrypts blocks of the files
File Encryption Patterns
ProLock modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ProLock..pr0Lock..proL0ckRansom Note and Payment Demands
After encrypting files, ProLock displays ransom notes demanding payment for file recovery:
[HOW TO RECOVER FILES].TXTRansom message:
notes/[HOW TO RECOVER FILES].TXT
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ProLock ransomware:
Winmgr.bmpWinMgr.bmpPPD8535CAAEC677E9FAF.exe
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About This Analysis
This ProLock 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 ProLock.
Last updated: July 30, 2025