Ransomware Research

Underground Team Ransomware

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

Quick Facts

Ransomware Family
Underground Team
First Seen
July 1, 2023

How Underground Team Ransomware Works

Ransom Note and Payment Demands

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

file!!readme!!!.txt

Ransom message:

notes/!!readme!!!.txt

Note locations:

EveryFolder
file!!readme!!!.txt

Ransom message:

notes/!!readme!!!_v2.txt

Note locations:

EveryFolder
file!!READ_ME!!.txt

Ransom message:

notes/!!READ_ME!!.txt

Note locations:

EveryFolder

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About This Analysis

This Underground Team 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 Underground Team.

Last updated: October 30, 2025

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