Suspicious Scan Loop Network — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: medium. Source dates: 2022-03-12 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0180b0d56cd33a57944aff1ec7d055d4be95ce99ccbda37aeeaba7cb1d886e9f

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 Scan Loop Network
id: f8ad2e2c-40b6-4117-84d7-20b89896ab23
status: test
description: Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1018/T1018.md
    - https://ss64.com/nt/for.html
    - https://ss64.com/ps/foreach-object.html
author: frack113
date: 2022-03-12
tags:
    - attack.execution
    - attack.t1059
    - attack.discovery
    - attack.t1018
logsource:
    category: process_creation
    product: windows
detection:
    selection_loop:
        CommandLine|contains:
            - 'for '
            - 'foreach '
    selection_tools:
        CommandLine|contains:
            - 'nslookup'
            - 'ping'
    condition: all of selection_*
falsepositives:
    - Legitimate script
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate script

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1018/T1018.md
• https://ss64.com/nt/for.html
• https://ss64.com/ps/foreach-object.html