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Ransomware Research
ASN1 Encoder Ransomware
ASN1 Encoder is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ASN1 Encoder
- First Seen
- November 1, 2016
How ASN1 Encoder Ransomware Works
Ransom Note and Payment Demands
After encrypting files, ASN1 Encoder displays ransom notes demanding payment for file recovery:
!!!!!readme!!!!!.htm
Ransom message:
notes/!!!!!readme!!!!!.htm
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with ASN1 Encoder ransomware:
20.exe
radCD474.tmp.vir.HSvir
content
1.exe
68df8f82.exe
4425046
d6834c5.exe
MediaInfo_DLL_0.7.90_Windows_i386.exe
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About This Analysis
This ASN1 Encoder 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 ASN1 Encoder.
Last updated: July 30, 2025