Arbitrary MSI Download Via Devinit.EXE — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-01-11 / 2023-04-06.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: dfc71a27ece387e1dea6b88483a494ec43d2b96a36236249a54ffed8a5e57471

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Arbitrary MSI Download Via Devinit.EXE
id: 90d50722-0483-4065-8e35-57efaadd354d
status: test
description: Detects a certain command line flag combination used by "devinit.exe", which can be abused as a LOLBIN to download arbitrary MSI packages on a Windows system
references:
    - https://twitter.com/mrd0x/status/1460815932402679809
    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Devinit/
author: Florian Roth (Nextron Systems)
date: 2022-01-11
modified: 2023-04-06
tags:
    - attack.execution
    - attack.stealth
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - ' -t msi-install '
            - ' -i http'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://twitter.com/mrd0x/status/1460815932402679809
• https://lolbas-project.github.io/lolbas/OtherMSBinaries/Devinit/