Ransomware Research
BlockZ Ransomware
BlockZ is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2022, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BlockZ
- First Seen
- April 1, 2022
How BlockZ Ransomware Works
File Encryption Patterns
BlockZ modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..blockZRansom Note and Payment Demands
After encrypting files, BlockZ displays ransom notes demanding payment for file recovery:
How To Restore Your Files.txtRansom message:
notes/How To Restore Your Files.txt
Note locations:
EveryFolderElastio Can Help You
Don't let BlockZ ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This BlockZ 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 BlockZ.
Last updated: July 30, 2025