Creation of a Diagcab

Description

Detects the creation of diagcab file, which could be caused by some legitimate installer or is a sign of exploitation (review the filename and its location)

Query · sigma

selection:
  TargetFilename|endswith: .diagcab
condition: selection

Known false positives

  • Legitimate microsoft diagcab
Raw source Creation of a Diagcab · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Creation of a Diagcab
id: 3d0ed417-3d94-4963-a562-4a92c940656a
status: test
description: Detects the creation of diagcab file, which could be caused by some legitimate installer or is a sign of exploitation (review the filename and its location)
references:
    - https://threadreaderapp.com/thread/1533879688141086720.html
author: frack113
date: 2022-06-08
tags:
    - attack.resource-development
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|endswith: '.diagcab'
    condition: selection
falsepositives:
    - Legitimate microsoft diagcab
level: medium

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