Netcat The Powershell Version — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: medium. Source dates: 2021-07-21 / 2023-10-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1f9433ffbfed0785461f4a8f18cd66d3330f747e168e907ae6719213fee4cfad

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: Netcat The Powershell Version
id: c5b20776-639a-49bf-94c7-84f912b91c15
related:
    - id: bf7286e7-c0be-460b-a7e8-5b2e07ecc2f2
      type: derived
status: test
description: Adversaries may use a non-application layer protocol for communication between host and C2 server or among infected hosts within a network
references:
    - https://nmap.org/ncat/
    - https://github.com/besimorhino/powercat
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1095/T1095.md
author: frack113
date: 2021-07-21
modified: 2023-10-27
tags:
    - attack.command-and-control
    - attack.execution
    - attack.t1095
    - attack.t1059.001
logsource:
    product: windows
    category: ps_classic_start
detection:
    selection:
        Data|contains:
            - 'powercat '
            - 'powercat.ps1'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://nmap.org/ncat/
• https://github.com/besimorhino/powercat
• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1095/T1095.md