Ransomware Research

DeepInDeep Ransomware

DeepInDeep is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
DeepInDeep
First Seen
November 1, 2023

How DeepInDeep ransomware works

File encryption patterns

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

Extensions added after encryption
.deepindeep

Ransom note and payment demands

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

fileinfo.txt
notes/info.txt
Location: RootDiscs, Desktop
fileinfo.hta
notes/info.hta
Location: RootDiscs, Desktop

Technical indicators

Associated executable files

The following executable files are associated with DeepInDeep ransomware:

About this analysis

This DeepInDeep 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 DeepInDeep.

Last updated: December 30, 2025

Detection coverage

Elastio detects DeepInDeep inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify DeepInDeep 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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