Ransomware Research
CryptoJoker 2020 Ransomware
CryptoJoker 2020 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. Security researchers also track this malware under the aliases: CryptoJoker-Nocry.
Quick Facts
- Ransomware Family
- CryptoJoker 2020
- First Seen
- August 1, 2019
- Known Aliases
- CryptoJoker-Nocry
How CryptoJoker 2020 Ransomware Works
Targeted Files
Some file types ecnrypted fully -> TXT7.txt.fully.nocry some partially (0x400 bytes from start) -> AC202.mdb.partially.nocry
File Encryption Patterns
CryptoJoker 2020 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..nocry..cryptojokerRansom Note and Payment Demands
After encrypting files, CryptoJoker 2020 displays ransom notes demanding payment for file recovery:
CryptoJoker Recovery Information.txtRansom message:
notes/CryptoJoker Recovery Information.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoJoker 2020 ransomware:
CryptoJoker.exe
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About This Analysis
This CryptoJoker 2020 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 CryptoJoker 2020.
Last updated: July 30, 2025