HelloKitty Ransomware
HelloKitty is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Kitty.
Quick facts
How HelloKitty ransomware works
File encryption patterns
HelloKitty modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, HelloKitty displays ransom notes demanding payment for file recovery:
notes/read_me_lkdtt.txt
notes/read_me_lkd.txt
notes/read_me_unlock.txt
notes/_read_me_bro.txt
Technical indicators
Associated executable files
The following executable files are associated with HelloKitty ransomware:
- ag.exe
- ransomware.Exe
- Trojan.Ransom.HelloKitty.exe
- ls.exe
About this analysis
This HelloKitty ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like HelloKitty.
Last updated: December 30, 2025
Elastio detects HelloKitty inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify HelloKitty across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
Recent ransomware
Explore other threats in our database