Potential DCOM InternetExplorer.Application DLL Hijack — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR), wagga. Source status: test; severity: critical. Source dates: 2020-10-12 / 2022-12-18.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5e8dbb71572d0fe8895278089fb8efa76f505830dcf8f3cc2328c283876301e3

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: Potential DCOM InternetExplorer.Application DLL Hijack
id: 2f7979ae-f82b-45af-ac1d-2b10e93b0baa
related:
    - id: e554f142-5cf3-4e55-ace9-a1b59e0def65
      type: obsolete
    - id: f354eba5-623b-450f-b073-0b5b2773b6aa
      type: similar
status: test
description: Detects potential DLL hijack of "iertutil.dll" found in the DCOM InternetExplorer.Application Class over the network
references:
    - https://threathunterplaybook.com/hunts/windows/201009-RemoteDCOMIErtUtilDLLHijack/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR), wagga
date: 2020-10-12
modified: 2022-12-18
tags:
    - attack.lateral-movement
    - attack.t1021.002
    - attack.t1021.003
logsource:
    product: windows
    category: file_event
detection:
    selection:
        Image: System
        TargetFilename|endswith: '\Internet Explorer\iertutil.dll'
    condition: selection
falsepositives:
    - Unknown
level: critical

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://threathunterplaybook.com/hunts/windows/201009-RemoteDCOMIErtUtilDLLHijack/notebook.html