Ransomware Research
Tesavek Ransomware
Tesavek is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2026, this ransomware has been actively targeting systems worldwide.
Quick facts
- Ransomware Family
- Tesavek
- First Seen
- January 1, 2026
How Tesavek ransomware works
File modification behavior
Tesavek updates file modification timestamps after encryption.
File encryption patterns
Tesavek modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .tesavek
Technical indicators
Associated executable files
The following executable files are associated with Tesavek ransomware:
- h2ea7mq1.exe
About this analysis
This Tesavek 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 Tesavek.
Detection coverage
Elastio detects Tesavek inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Tesavek across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.