Ransomware Research
Viro Botnet Ransomware
Viro Botnet is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: ViroBotnet.
Quick Facts
- Ransomware Family
- Viro Botnet
- First Seen
- September 1, 2018
- Known Aliases
- ViroBotnet
How Viro Botnet Ransomware Works
Targeted Files
RAT with features
File Encryption Patterns
Viro Botnet modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encRansom Note and Payment Demands
After encrypting files, Viro Botnet displays ransom notes demanding payment for file recovery:
README.txtRansom message:
notes/README.txt
Note locations:
UserProfileRansom message:
notes/note.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with Viro Botnet ransomware:
Office Updater.exe578933.exemyfile.exe
Elastio Can Help You
Don't let Viro Botnet ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Viro Botnet 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 Viro Botnet.
Last updated: July 30, 2025