Ransomware Research
PrO Ransomware
PrO is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- PrO
- First Seen
- July 1, 2023
How PrO Ransomware Works
Targeted Files
Skips first 23 bytes
File Encryption Patterns
PrO modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..PrORansom Note and Payment Demands
After encrypting files, PrO displays ransom notes demanding payment for file recovery:
HOW TO DECRYPT FILES.txtRansom message:
notes/HOW TO DECRYPT FILES.txt
Note locations:
EveryFolderRansom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with PrO ransomware:
f3HvP0ctQa2Mx37.exeP1.exe
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About This Analysis
This PrO 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 PrO.
Last updated: July 30, 2025