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Ransomware Research
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
- Ransomware Family
- HelloKitty
- First Seen
- October 1, 2020
- Known Aliases
- Kitty
How HelloKitty Ransomware Works
File Encryption Patterns
HelloKitty modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..crypted
..kitty
..crypt
..v-society
..boombye
Ransom Note and Payment Demands
After encrypting files, HelloKitty displays ransom notes demanding payment for file recovery:
read_me_lkdtt.txt
Ransom message:
notes/read_me_lkdtt.txt
Note locations:
EveryFolder
read_me_lkd.txt
Ransom message:
notes/read_me_lkd.txt
Note locations:
EveryFolder
read_me_unlock.txt
Ransom message:
notes/read_me_unlock.txt
Note locations:
EveryFolder
_read_me_bro.txt
Ransom message:
notes/_read_me_bro.txt
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with HelloKitty ransomware:
ag.exe
ransomware.Exe
Trojan.Ransom.HelloKitty.exe
ls.exe
Elastio Can Help You
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About This Analysis
This HelloKitty 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 HelloKitty.
Last updated: July 30, 2025