Ransomware Research

AVCrypt Ransomware

AVCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: AVKill.

Quick Facts

Ransomware Family
AVCrypt
First Seen
March 1, 2018
Known Aliases
AVKill

How AVCrypt Ransomware Works

File Encryption Patterns

AVCrypt modifies encrypted files using specific patterns to mark them as encrypted:

Prefixes added to encrypted files:

+

Ransom Note and Payment Demands

After encrypting files, AVCrypt displays ransom notes demanding payment for file recovery:

file+HOW_TO_UNLOCK.txt

Ransom message:

notes/+HOW_TO_UNLOCK.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with AVCrypt ransomware:

  • myfile.exe
  • Ransomware_AVCrypt.exe
  • Sample_5ab64cacdabaeb038fa863ab.exe
  • av2018.exe
  • benedikt richter.exe
  • Admin.exe
  • Av.exe
  • a64dd2f21a42713131f555bea9d0a76918342d696ef6731608a9dbc57b79b32f.bin_used
  • 58.exe

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About This Analysis

This AVCrypt 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 AVCrypt.

Last updated: October 30, 2025

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