Disabled IE Security Features — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2020-06-19 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: c53122e979d0fb360ecc94c9baca86fe3460be22fba9812361e91dd432c7d4fb

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: Disabled IE Security Features
id: fb50eb7a-5ab1-43ae-bcc9-091818cb8424
status: test
description: Detects command lines that indicate unwanted modifications to registry keys that disable important Internet Explorer security features
references:
    - https://unit42.paloaltonetworks.com/operation-ke3chang-resurfaces-with-new-tidepool-malware/
author: Florian Roth (Nextron Systems)
date: 2020-06-19
modified: 2021-11-27
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: process_creation
    product: windows
detection:
    selection1:
        CommandLine|contains|all:
            - ' -name IEHarden '
            - ' -value 0 '
    selection2:
        CommandLine|contains|all:
            - ' -name DEPOff '
            - ' -value 1 '
    selection3:
        CommandLine|contains|all:
            - ' -name DisableFirstRunCustomize '
            - ' -value 2 '
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://unit42.paloaltonetworks.com/operation-ke3chang-resurfaces-with-new-tidepool-malware/