Ransomware Research
Viagra Ransomware
Viagra is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Viagra
- First Seen
- August 1, 2019
How Viagra Ransomware Works
Targeted Files
https://app.any.run/tasks/6198a597-b904-421f-8100-9fef5b572ed6/ Suffix regex based on base64 detection with random 4 chars -> desktop.ini.VcyltempJ5oRz3Wn5kleSQ==ObcK There is no backslashes in regex according RUST specs
File Encryption Patterns
Viagra modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}={2})[A-Z-a-z0-9]{4}$/Ransom Note and Payment Demands
After encrypting files, Viagra displays ransom notes demanding payment for file recovery:
/^README-VIAGRA-[A-Za-z0-9]{8}\.HTML$/Ransom message:
notes/README-VIAGRA-nqumz9B9.HTML
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Viagra ransomware:
dotnetfx35setup.exe
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About This Analysis
This Viagra 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 Viagra.
Last updated: July 30, 2025