Ransomware Research
Ultimo HT Ransomware
Ultimo HT is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Ultimo HT
- First Seen
- September 1, 2017
How Ultimo HT Ransomware Works
Targeted Files
Current samples create ransom note in the \\Desktop\\test\\ folder
File Encryption Patterns
Ultimo HT modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..lockedRansom Note and Payment Demands
After encrypting files, Ultimo HT displays ransom notes demanding payment for file recovery:
READ_IT.txtRansom message:
notes/READ_IT.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Ultimo HT ransomware:
Weaternunion MTCN.exe
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About This Analysis
This Ultimo HT 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 Ultimo HT.
Last updated: July 30, 2025