Ransomware Research

CradleCore Ransomware

CradleCore is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Cradle.

Quick Facts

Ransomware Family
CradleCore
First Seen
April 1, 2017
Known Aliases
Cradle

How CradleCore Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..cradle

Ransom Note and Payment Demands

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

file_HOW_TO_UNLOCK_FILES_.html

Ransom message:

notes/_HOW_TO_UNLOCK_FILES_.html

Note locations:

DesktopStartUp

Technical Indicators

Associated Executable Files

The following executable files are associated with CradleCore ransomware:

  • Trojan.Ransom.CradleCore.exe
  • cradle.exe
  • cradleapp_landscape.exe
  • s.exe
  • Cradle.exe
  • copycopy.exe

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About This Analysis

This CradleCore 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 CradleCore.

Last updated: July 30, 2025