Ransomware Research

TeslaCrypt 4 Ransomware

TeslaCrypt 4 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
TeslaCrypt 4
First Seen
April 1, 2016

How TeslaCrypt 4 Ransomware Works

Targeted Files

https://www.bleepingcomputer.com/news/security/teslacrypt-4-0-released-with-bug-fixes-and-stops-adding-extensions/ https://www.bleepingcomputer.com/news/security/teslacrypt-shuts-down-and-releases-master-decryption-key/

Ransom Note and Payment Demands

After encrypting files, TeslaCrypt 4 displays ransom notes demanding payment for file recovery:

file/^-!RecOveR!-[a-z0-9]{5}\+\+\.Htm$/

Ransom message:

notes/-!RecOveR!-awcrj++.Htm

Note locations:

EveryFolder
file/^-!RecOveR!-[a-z0-9]{5}\+\+\.Png$/

Ransom message:

notes/-!RecOveR!-awcrj++.Png

Note locations:

EveryFolder
file/^-!RecOveR!-[a-z0-9]{5}\+\+\.Txt$/

Ransom message:

notes/-!RecOveR!-awcrj++.Txt

Note locations:

EveryFolder
file/^RECOVER[a-z]{5}\.html$/

Ransom message:

notes/RECOVERilqcn.html

Note locations:

EveryFolder
file/^RECOVER[a-z]{5}\.png$/

Ransom message:

notes/RECOVERilqcn.png

Note locations:

EveryFolder
file/^RECOVER[a-z]{5}\.txt$/

Ransom message:

notes/RECOVERilqcn.txt

Note locations:

EveryFolder

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About This Analysis

This TeslaCrypt 4 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 TeslaCrypt 4.

Last updated: July 30, 2025

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