Ransomware Research
HappyDayzz Ransomware
HappyDayzz is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: BlackJockerCrypter.
Quick Facts
- Ransomware Family
- HappyDayzz
- First Seen
- March 1, 2017
- Known Aliases
- BlackJockerCrypter
How HappyDayzz Ransomware Works
File Encryption Patterns
HappyDayzz modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..happydayzzPrefixes added to encrypted files:
[blackjockercrypter@gmail.com]Ransom Note and Payment Demands
After encrypting files, HappyDayzz displays ransom notes demanding payment for file recovery:
How To Recover Encrypted Files.htaRansom message:
notes/How To Recover Encrypted Files.hta
Note locations:
EveryFolderHow To Recover Encrypted Files.htmlRansom message:
notes/How To Recover Encrypted Files.html
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with HappyDayzz ransomware:
HappyDayZZZ.exeprotectedpinkpanter.exeadminlogin.ex_tmp_27581-protectedpinkpanter435215626.exeadminlogin.exeHappyDayzz_ransomware
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About This Analysis
This HappyDayzz 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 HappyDayzz.
Last updated: October 30, 2025
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