Suspicious Extrac32 Alternate Data Stream Execution — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: medium. Source dates: 2021-11-26 / 2022-12-30.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0e89a1062c9bd446cabc72dcb74ecf6e345b33c3e68ba464de9b50f5af9ae64d

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: Suspicious Extrac32 Alternate Data Stream Execution
id: 4b13db67-0c45-40f1-aba8-66a1a7198a1e
status: test
description: Extract data from cab file and hide it in an alternate data stream
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Extrac32/
author: frack113
date: 2021-11-26
modified: 2022-12-30
tags:
    - attack.stealth
    - attack.t1564.004
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - extrac32.exe
            - .cab
        CommandLine|re: ':[^\\]'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Extrac32/