Crypt0L0cker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
Ransomware Family
Crypt0L0cker
First Seen
August 1, 2016
How Crypt0L0cker Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/574608/crypt0l0cker-support-topic/page-44#entry4795322
Written in Python (2.7)
Encrypts only \\Desktop\\Projekte\\ folder
https://app.any.run/tasks/76a8eed6-98fc-4a78-8510-67a192c4281b/
https://www.hybrid-analysis.com/sample/1027d99f7658eb33867b821c30296c1043e4916cd93167a4c0ed941e6f1f0c1d?environmentId=100
Requires C&C
https://web.archive.org/web/20170302151753/https://heimdalsecurity.com/blog/security-alert-new-torrentlocker-targets-denmark-ransomware/
File Encryption Patterns
Crypt0L0cker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encrypted..enc./\.[a-z]{6}$/
Ransom Note and Payment Demands
After encrypting files, Crypt0L0cker displays ransom notes demanding payment for file recovery:
fileCOMMENT_RESTAURER_DES_FICHIERS.txt
Ransom message:
notes/COMMENT_RESTAURER_DES_FICHIERS.txt
fileWichtige Information zum Wiederherstellen der Daten.htm
Ransom message:
notes/Wichtige Information zum Wiederherstellen der Daten.htm
Note locations:
Desktop
fileDECRYPT_INSTRUCTIONS.HTML
fileHOW_TO_RESTORE_FILES.html
Note locations:
EveryFolder
fileHOW_TO_RESTORE_FILES.txt
Ransom message:
notes/HOW_TO_RESTORE_FILES.txt
Note locations:
EveryFolder
fileDECRYPT_INSTRUCTIONS.TXT
Ransom message:
notes/DECRYPT_INSTRUCTIONS.TXT
fileSIFRE_COZME_TALIMATI.txt
Ransom message:
notes/SIFRE_COZME_TALIMATI.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with Crypt0L0cker ransomware:
oqezujlg.exe
Send Bug Report
file.exe
file[1].exe
aa
VigXwo.vsd
encrypt2.exe
myfile.exe
Elastio Can Help You
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This Crypt0L0cker 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 Crypt0L0cker.