Ransomware Research
X101 Ransomware
X101 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- X101
- First Seen
- December 1, 2024
How X101 Ransomware Works
Targeted Files
Full extension -> .[0cefdb253d].X101
File Encryption Patterns
X101 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..X101Ransom Note and Payment Demands
After encrypting files, X101 displays ransom notes demanding payment for file recovery:
!!!HOW_TO_DECRYPT!!!.TXTRansom message:
notes/!!!HOW_TO_DECRYPT!!!.TXT
Note locations:
EveryFolderElastio Can Help You
Don't let X101 ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This X101 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 X101.
Last updated: July 30, 2025