Ransomware Research

FLocker Ransomware

FLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2024, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
FLocker
First Seen
November 1, 2024

How FLocker ransomware works

File modification behavior

FLocker updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .Flock

Ransom note and payment demands

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

fileFLOCK_DECRYPT.txt
notes/FLOCK_DECRYPT.txt

Location: EveryFolder

screenshot
notes/wallpaper.png

Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with FLocker ransomware:

  • 3646645353.exe

About this analysis

This FLocker 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 FLocker.

Last updated: August 27, 2026

Detection coverage

Elastio detects FLocker inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify FLocker 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.