T1Happy Ransomware
T1Happy is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick facts
How T1Happy ransomware works
File encryption patterns
T1Happy modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, T1Happy displays ransom notes demanding payment for file recovery:
notes/HIT BY RANSOMWARE.txt
Technical indicators
Associated executable files
The following executable files are associated with T1Happy ransomware:
- a.exe
- T1.exe
- T1.bin
- b.exe
- happy2.exe
- d.exe
- happy4.exe
- c.exe
- happy3.exe
About this analysis
This T1Happy 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 T1Happy.
Last updated: December 30, 2025
Elastio detects T1Happy inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify T1Happy 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.
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