Ransomware Research
WannaCry Ransomware
WannaCry is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: WannaCryptor.
Quick Facts
- Ransomware Family
- WannaCry
- First Seen
- March 1, 2017
- Known Aliases
- WannaCryptor
How WannaCry Ransomware Works
File Encryption Patterns
WannaCry modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..WCRY..WCYR..WCRYT..PLEASE_CONTACT_1398456099@qq_comRansom Note and Payment Demands
After encrypting files, WannaCry displays ransom notes demanding payment for file recovery:
!Please Read Me!.txtRansom message:
notes/!Please Read Me!.txt
Note locations:
EveryFolderRansom message:
notes/1.png
Note locations:
DesktopRansom message:
notes/note.txt
Note locations:
LoginTechnical Indicators
Associated Executable Files
The following executable files are associated with WannaCry ransomware:
!WannaDecryptor!.exeu.wryMessage.EXEfile450_!wannadecryptor!.exewannacry.exe447033.exe
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About This Analysis
This WannaCry 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 WannaCry.
Last updated: July 30, 2025