Ransomware Research
BLOCKER Ransomware
BLOCKER is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BLOCKER
- First Seen
- March 1, 2023
How BLOCKER Ransomware Works
Targeted Files
Suffix generation -> (DateTime.Now.Day + 10).ToString(), Convert.ToChar(random.Next(0x61, 0x7a)).ToString(), Convert.ToChar(random.Next(0x61, 0x7a)).ToString(), (DateTime.Now.Month + 20).ToString(), "@BLOCKED" Destroys zip-archives
File Encryption Patterns
BLOCKER modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.\d{2}[a-z]{2}\d{2}@BLOCKED$/Ransom Note and Payment Demands
After encrypting files, BLOCKER displays ransom notes demanding payment for file recovery:
/^[a-z]{15}\.txt$/Ransom message:
notes/cbwgjamnplqmaag.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BLOCKER ransomware:
Framp.exeFramp355.exe
Elastio Can Help You
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About This Analysis
This BLOCKER 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 BLOCKER.
Last updated: July 30, 2025