Ransomware Research
CryptoJoker 2019 Ransomware
CryptoJoker 2019 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: CryptoJoker-Boom.
Quick Facts
- Ransomware Family
- CryptoJoker 2019
- First Seen
- September 1, 2019
- Known Aliases
- CryptoJoker-Boom
How CryptoJoker 2019 Ransomware Works
Targeted Files
Encrypts first 0x400 bytes Full extension of encrypted files -> .[rans0me@protonmail.com].b00m
File Encryption Patterns
CryptoJoker 2019 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..b00mRansom Note and Payment Demands
After encrypting files, CryptoJoker 2019 displays ransom notes demanding payment for file recovery:
HACKED.txtRansom message:
notes/HACKED.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoJoker 2019 ransomware:
CryptoJoker.exeinstaller.exeK82PHO.exedd.exe
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About This Analysis
This CryptoJoker 2019 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 2019.
Last updated: July 30, 2025