Ransomware Research

ABCLocker Ransomware

ABCLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
ABCLocker
First Seen
July 1, 2017

How ABCLocker Ransomware Works

Ransom Note and Payment Demands

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

fileOPEN_TO_UNLOCK_YOUR_FILES.html

Ransom message:

notes/OPEN_TO_UNLOCK_YOUR_FILES.html

Note locations:

UserFolders

Technical Indicators

Associated Executable Files

The following executable files are associated with ABCLocker ransomware:

  • cloudsword.exe
  • abclocker.exe
  • Tory.exe
  • Windows Update.exe

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About This Analysis

This ABCLocker 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 ABCLocker.

Last updated: October 30, 2025

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