Ransomware Research
Quantum Ransomware
Quantum is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2021, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Quantum
- First Seen
- September 1, 2021
How Quantum Ransomware Works
Targeted Files
sample will work only in 2021 year (pointer calculation based on current date) sample is 64bit dll, should be start with rundll32 dllname.dll,#1 511c1021fad76670d6d407139e5fef62b34ca9656fb735bd7d406728568fa280 -> OK
File Encryption Patterns
Quantum modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..quantumRansom Note and Payment Demands
After encrypting files, Quantum displays ransom notes demanding payment for file recovery:
README_TO_DECRYPT.htmlRansom message:
notes/README_TO_DECRYPT.html
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Quantum ransomware:
manual64.dll
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About This Analysis
This Quantum 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 Quantum.
Last updated: July 30, 2025