Ransomware Research

HiddenTear Ransomware

HiddenTear is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
HiddenTear
First Seen
July 1, 2016

How HiddenTear Ransomware Works

Targeted Files

14c49b0e956ac8ae253cd97133f61f41bbee5d9c3c90bd9248d79f2ba9da4fb6 -> .{fasfry2323@naver.com}.RansomLocker

File Encryption Patterns

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

File extensions added after encryption:

..locked..monstro..blacklistcp..fucked..Encrypted..RansomLocker..fasfry2323@naver.com

Ransom Note and Payment Demands

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

fileREAD_ME.txt

Ransom message:

notes/READ_ME.txt

Note locations:

Desktop
fileNotice.txt

Ransom message:

notes/Notice.txt

Note locations:

Desktop
fileSORRY_Прости.txt

Ransom message:

notes/SORRY_Прости.txt

Note locations:

Desktop
fileWarning!!!!!!.txt

Ransom message:

notes/Warning!!!!!!.txt

Note locations:

Desktop
fileReadMe.txt

Ransom message:

notes/ReadMe.txt

Note locations:

Desktop
message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

Technical Indicators

Associated Executable Files

The following executable files are associated with HiddenTear ransomware:

  • Battlefiled.exe
  • blacklistcp.exe
  • SAT_d.exe

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About This Analysis

This HiddenTear 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 HiddenTear.

Last updated: July 30, 2025

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