Ransomware Research

SD Ransomware

SD is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: SD 1.1-1.2, NewSource, Unlock11.

Quick Facts

Ransomware Family
SD
First Seen
June 1, 2019
Known Aliases
SD 1.1-1.2NewSourceUnlock11

How SD Ransomware Works

Targeted Files

Full extension of encrypted files -> .[Unlock11@protonmail.com].enc

File Encryption Patterns

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

File extensions added after encryption:

..enc..fsociety

Ransom Note and Payment Demands

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

fileReadMeToDecrypte.txt

Ransom message:

notes/ReadMeToDecrypte.txt

Note locations:

Desktop
fileDecrypt Your Files.txt

Ransom message:

notes/Decrypt Your Files.txt

Technical Indicators

Associated Executable Files

The following executable files are associated with SD ransomware:

  • NewSource.exe

Elastio Can Help You

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About This Analysis

This SD 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 SD.

Last updated: July 30, 2025

SD Ransomware - Detectable by Elastio