Ransomware Research

EGG Ransomware

EGG is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: EggLocker.

Quick facts

Ransomware Family
EGG
First Seen
March 1, 2018
Known Aliases
EggLocker

How EGG ransomware works

File encryption patterns

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

Extensions added after encryption
.EGG

Ransom note and payment demands

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

fileEGG.txt
notes/EGG.txt
Location: UserFolders, StartUp, RansomPayloadStartFolder

Technical indicators

Associated executable files

The following executable files are associated with EGG ransomware:

About this analysis

This EGG 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 EGG.

Last updated: December 30, 2025

Detection coverage

Elastio detects EGG inside your data and backups.

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

See How the Hunt Engine WorksRequest a Demo

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What is EGG Ransomware? | Elastio