Ransomware Research
EncryptoJJS Ransomware
EncryptoJJS is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- EncryptoJJS
- First Seen
- November 1, 2016
How EncryptoJJS Ransomware Works
Targeted Files
Encrypts only %Pictures% folder; Ransom note also stored there Destroys files (0 size)
File Encryption Patterns
EncryptoJJS modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encRansom Note and Payment Demands
After encrypting files, EncryptoJJS displays ransom notes demanding payment for file recovery:
How to recover.enc.txtRansom message:
notes/How to recover.enc.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with EncryptoJJS ransomware:
encryptoJJS 1.0.exeEncryptoJJS_Ransomware
Elastio Can Help You
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About This Analysis
This EncryptoJJS 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 EncryptoJJS.
Last updated: July 30, 2025