Ransomware Research
BlueSky Ransomware
BlueSky is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2022, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BlueSky
- First Seen
- June 1, 2022
How BlueSky Ransomware Works
File Encryption Patterns
BlueSky modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..blueskyRansom Note and Payment Demands
After encrypting files, BlueSky displays ransom notes demanding payment for file recovery:
# DECRYPT FILES BLUESKY #.htmlRansom message:
notes/# DECRYPT FILES BLUESKY #.html
Note locations:
EveryFolder# DECRYPT FILES BLUESKY #.txtRansom message:
notes/# DECRYPT FILES BLUESKY #.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BlueSky ransomware:
l.exejavaw.exe
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About This Analysis
This BlueSky 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 BlueSky.
Last updated: July 30, 2025