Ransomware Research
CY3 Ransomware
CY3 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CY3
- First Seen
- January 1, 2023
How CY3 Ransomware Works
Targeted Files
Full extension -> .id-C63F241F.[cybercrypt@tutanota.com].CY3
File Encryption Patterns
CY3 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..CY3
Ransom Note and Payment Demands
After encrypting files, CY3 displays ransom notes demanding payment for file recovery:
info.txt
Ransom message:
notes/info.txt
Note locations:
RootDiscs
Desktop
Info.hta
Ransom message:
notes/Info.hta
Note locations:
StartUp
Roaming
Technical Indicators
Associated Executable Files
The following executable files are associated with CY3 ransomware:
software.exe
file.exe
program.exe
cyber.exe
Elastio Can Help You
Don't let CY3 ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CY3 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 CY3.
Last updated: July 30, 2025