Ransomware Research
CryptoNar Ransomware
CryptoNar is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: CryptoJoker 2018.
Quick Facts
- Ransomware Family
- CryptoNar
- First Seen
- August 1, 2018
- Known Aliases
- CryptoJoker 2018
How CryptoNar Ransomware Works
Targeted Files
.fully.cryptoNar for full encrypted files .partially.cryptoNar for partially encrypted files Encrypts first 0x400 bytes
File Encryption Patterns
CryptoNar modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cryptoNarRansom Note and Payment Demands
After encrypting files, CryptoNar displays ransom notes demanding payment for file recovery:
CRYPTONAR RECOVERY INFORMATION.txtRansom message:
notes/CRYPTONAR RECOVERY INFORMATION.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoNar ransomware:
CryptoNar.exemyfile.exeasdfc4.exe
Elastio Can Help You
Don't let CryptoNar ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CryptoNar 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 CryptoNar.
Last updated: July 30, 2025