Ransomware Research

WannaLeave Ransomware

WannaLeave is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2026, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
WannaLeave
First Seen
February 1, 2026

How WannaLeave ransomware works

File modification behavior

WannaLeave updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .WannaCry!!

Ransom note and payment demands

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

file!!LeaveMe!!.txt
notes/!!LeaveMe!!.txt

Location: Desktop

screenshot
notes/CachedImage_1152_864_POS4.jpg

Location: Desktop

About this analysis

This WannaLeave 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 WannaLeave.

Last updated: June 3, 2026

Detection coverage

Elastio detects WannaLeave inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify WannaLeave 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.