Renamed MegaSync Execution

Description

Detects the execution of a renamed MegaSync.exe as seen used by ransomware families like Nefilim, Sodinokibi, Pysa, and Conti.

Query · sigma

selection:
  OriginalFileName: megasync.exe
filter:
  Image|endswith: \megasync.exe
condition: selection and not filter

Known false positives

  • Software that illegally integrates MegaSync in a renamed form
  • Administrators that have renamed MegaSync
Raw source Renamed MegaSync Execution · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Renamed MegaSync Execution
id: 643bdcac-8b82-49f4-9fd9-25a90b929f3b
status: test
description: Detects the execution of a renamed MegaSync.exe as seen used by ransomware families like Nefilim, Sodinokibi, Pysa, and Conti.
references:
    - https://redcanary.com/blog/rclone-mega-extortion/
author: Sittikorn S
date: 2021-06-22
modified: 2023-02-03
tags:
    - attack.stealth
    - attack.t1218
logsource:
    product: windows
    category: process_creation
detection:
    selection:
        OriginalFileName: 'megasync.exe'
    filter:
        Image|endswith: '\megasync.exe'
    condition: selection and not filter
falsepositives:
    - Software that illegally integrates MegaSync in a renamed form
    - Administrators that have renamed MegaSync
level: high

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