Ransomware Research
Onion3Cry Ransomware
Onion3Cry is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Onion3Crypt.
Quick Facts
- Ransomware Family
- Onion3Cry
- First Seen
- September 1, 2017
- Known Aliases
- Onion3Crypt
How Onion3Cry Ransomware Works
File Encryption Patterns
Onion3Cry modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..onion3cry-open-DECRYPTMYFILESRansom Note and Payment Demands
After encrypting files, Onion3Cry displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with Onion3Cry ransomware:
onion3.exegoupdate.exegoupdate.exe.bin
Elastio Can Help You
Don't let Onion3Cry ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Onion3Cry 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 Onion3Cry.
Last updated: July 30, 2025