Ransomware Research

Magniber Ransomware

Magniber is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: My Decryptor.

Quick Facts

Ransomware Family
Magniber
First Seen
October 1, 2017
Known Aliases
My Decryptor

How Magniber Ransomware Works

Targeted Files

a8f86ee2d866f2216d5298f5319ca8bce9caf24fdb4feb51c2148eba40ad6eb6 -> MSI file. Works only on win10/11 (due to SYSCALLS) c21887eaa1e31b9220d0807d3a7d0f30421ab6f80cfc1c556d534587dd9e6343 -> OK

File Encryption Patterns

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

File extensions added after encryption:

./\.[a-z]{5,9}$/..kgpvwnr..hfsgvl..ypail..sbulzxt..ygshc..hxzrvhh..bciheah..dadvtuq..fprgbk..madrcby..ymdmf

Ransom Note and Payment Demands

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

filereadme.txt

Ransom message:

notes/readme.txt
fileREADME.html

Ransom message:

notes/README.html

Note locations:

EveryFolder
fileREAD_ME_FOR_DECRYPT.txt

Ransom message:

notes/READ_ME_FOR_DECRYPT.txt

Note locations:

EveryFolder
file/^_HOW_TO_DECRYPT_MY_FILES_[a-z0-9]{10,20}_\.txt$/

Ransom message:

notes/_HOW_TO_DECRYPT_MY_FILES_27dh6y1kyr49yjhx8i3_.txt

Note locations:

EveryFolder
file/^READ_ME_FOR_DECRYPT_[a-z0-9]{10,20}_\.txt$/

Ransom message:

notes/READ_ME_FOR_DECRYPT_lz44rh37k62ui993869_.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Magniber ransomware:

  • kgpvwnr.exe
  • Magniber.exe
  • SAMPELS (102)
  • magniber_payload_N3ii3Ne9O10VC5LU.exe
  • FILE_6
  • FILE_16
  • MbxrightsCorelocation
  • MbxrightsCorelocation.exe
  • Magnitude_Payload
  • exercise
  • magni_orig.dll
  • payl2.dll
  • hsmzrhfe.dll
  • SYSTEM.Security.Update.Package-da2e252817.msi
  • G_001.xxxxxxx
  • G_001.msi
  • 429307.msi
  • G_001.msi_
  • G_001
  • Security_Upgrade_Software_Win10.0.msi

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About This Analysis

This Magniber 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 Magniber.

Last updated: July 30, 2025

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Magniber Ransomware - Detectable by Elastio