Ransomware Research

Crypt0L0cker Ransomware

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

File modification behavior

Crypt0L0cker updates file modification timestamps after encryption.

File encryption patterns

Crypt0L0cker modifies encrypted files using specific patterns to mark them as encrypted:

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
notes/COMMENT_RESTAURER_DES_FICHIERS.txt
fileWichtige Information zum Wiederherstellen der Daten.htm
notes/Wichtige Information zum Wiederherstellen der Daten.htm

Location: Desktop

fileDECRYPT_INSTRUCTIONS.HTML
fileHOW_TO_RESTORE_FILES.html

Location: EveryFolder

fileHOW_TO_RESTORE_FILES.txt
notes/HOW_TO_RESTORE_FILES.txt

Location: EveryFolder

fileDECRYPT_INSTRUCTIONS.TXT
notes/DECRYPT_INSTRUCTIONS.TXT
fileSIFRE_COZME_TALIMATI.txt
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

About this analysis

This Crypt0L0cker ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Crypt0L0cker.

Last updated: August 29, 2024

Detection coverage

Elastio detects Crypt0L0cker inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Crypt0L0cker across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.