Ransomware Research

DotNoData Ransomware

DotNoData is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2019, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
DotNoData
First Seen
April 1, 2019

How DotNoData Ransomware Works

Targeted Files

NOSAMPLE

File Encryption Patterns

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

File extensions added after encryption:

.._Crypted

Ransom Note and Payment Demands

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

file_CRYPTED_README.html

Ransom message:

notes/_CRYPTED_README.html

Elastio Can Help You

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About This Analysis

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

Last updated: July 30, 2025

DotNoData Ransomware - Detectable by Elastio