Ransomware Research
CryptoBlock Ransomware
CryptoBlock is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoBlock
- First Seen
- December 1, 2016
How CryptoBlock Ransomware Works
Targeted Files
Encrypts filenames -> Biblio.mdb -> x!$ 3ap-j.dzi https://www.malwarebytes.com/blog/news/2017/03/cryptoblock-and-its-c2
Ransom Note and Payment Demands
After encrypting files, CryptoBlock displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoBlock ransomware:
Adobe Systems, Incorporateddynamiclinkmediaserver.exeNdamin.exe
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About This Analysis
This CryptoBlock 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 CryptoBlock.
Last updated: July 30, 2025