Ransomware Research
JCry Ransomware
JCry is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: OpJerusalem.
Quick Facts
- Ransomware Family
- JCry
- First Seen
- March 1, 2019
- Known Aliases
- OpJerusalem
How JCry Ransomware Works
Targeted Files
PersonalKey.txt file on the Desktop
File Encryption Patterns
JCry modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..jcryRansom Note and Payment Demands
After encrypting files, JCry displays ransom notes demanding payment for file recovery:
JCRY_Note.htmlRansom message:
notes/JCRY_Note.html
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with JCry ransomware:
flashplayer_install.exeflashplayer.exeEnc.exeDec.exe
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About This Analysis
This JCry 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 JCry.
Last updated: July 30, 2025