Ransomware Research

HildaCrypt Ransomware

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

Quick Facts

Ransomware Family
HildaCrypt
First Seen
August 1, 2019

How HildaCrypt Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..HILDA!..HCY!..liluzivert

Ransom Note and Payment Demands

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

fileREAD_IT.TXT

Ransom message:

notes/READ_IT.TXT

Note locations:

EveryFolder
fileHILDACRYPTReadMe.html

Ransom message:

notes/HILDACRYPTReadMe.html

Note locations:

EveryFolder
fileYOUR_FILES_ARE_ENCRYPTED.TXT

Ransom message:

notes/YOUR_FILES_ARE_ENCRYPTED.TXT

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with HildaCrypt ransomware:

  • Encryptor.exe
  • important company update september 2019.pdf.exe
  • kjkjfkj3khhhkf.exe
  • svchost32.exe
  • xamp-install.exe

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About This Analysis

This HildaCrypt 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 HildaCrypt.

Last updated: October 30, 2025

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