Ransomware Research
Hellokittycat Ransomware
Hellokittycat is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Hellokittycat
- First Seen
- February 1, 2023
How Hellokittycat Ransomware Works
Targeted Files
Hta-file ! https://analyze.intezer.com/analyses/0d3ffbc7-753a-4009-9bcb-7831eff1ade9
File Encryption Patterns
Hellokittycat modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..lockedRansom Note and Payment Demands
After encrypting files, Hellokittycat displays ransom notes demanding payment for file recovery:
READ_ME2.htmlRansom message:
notes/READ_ME2.html
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Hellokittycat ransomware:
222
Elastio Can Help You
Don't let Hellokittycat ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Hellokittycat 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 Hellokittycat.
Last updated: July 30, 2025