Ransomware Research

ChernoLocker Ransomware

ChernoLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2019, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
ChernoLocker
First Seen
December 1, 2019

How ChernoLocker Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

.(.filelocker@protonmail.ch).(.CHERNOLOCKER)

Ransom Note and Payment Demands

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

message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

Technical Indicators

Associated Executable Files

The following executable files are associated with ChernoLocker ransomware:

  • Trojan.Ransom.ChernoLocker.exe
  • ChernoLocker.exe
  • Adobe Acrobat Activation Patch.exe
  • Mobdro For PC.exe

Recovery and Decryption Tools

Good news! Decryption tools are available for ChernoLocker ransomware:

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About This Analysis

This ChernoLocker 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 ChernoLocker.

Last updated: July 30, 2025