Ransomware Research
KesLan Ransomware
KesLan is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: KesLan, MMRansom, ZZZZZZZZZZ, TurkishRansom, TRSomware.
Quick Facts
- Ransomware Family
- KesLan
- First Seen
- November 1, 2019
- Known Aliases
- KesLanMMRansomZZZZZZZZZZTurkishRansomTRSomware
How KesLan Ransomware Works
File Encryption Patterns
KesLan modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..TMTEAM..TRSomware..MMTeam..Sifrelendi..TRRansom Note and Payment Demands
After encrypting files, KesLan displays ransom notes demanding payment for file recovery:
Dosyalarını Kurtarmak İstiyorsan Oku!!!.txtRansom message:
notes/Dosyalarını Kurtarmak İstiyorsan Oku!!!.txt
Note locations:
Desktop@Lütfen Beni Oku!@.txtRansom message:
notes/@Lütfen Beni Oku!@.txt
Note locations:
UserFoldersRansom message:
notes/wallpaper.bmp
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with KesLan ransomware:
ZZZZZZZZZZ.exetempasd456.exe57yhyh.exeZZZZZZZZZZ(1).exevicswors.vbsWindowsFormsApp.exeZZZZZZZZZZ(4).exeZZZZZZZZZZ.bin@MMDecrypt0r@.exe@mmdecrypt0r@.exeHacks.bin
Recovery and Decryption Tools
Good news! Decryption tools are available for KesLan ransomware:
0
Elastio Can Help You
Don't let KesLan ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This KesLan 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 KesLan.
Last updated: October 30, 2025
Recent Ransomware
Explore other threats in our database