Potential Packet Capture Activity Via Start-NetEventSession - ScriptBlock

testmedium
Log-Quelle: windows · ps_scriptAutor frack113Datum 2024-05-12
01

Beschreibung

Was dies ist, in Kürze.

Detects the execution of powershell scripts with calls to the "Start-NetEventSession" cmdlet. Which allows an attacker to start event and packet capture for a network event session. Adversaries may attempt to capture network to gather information over the course of an operation. Data captured via this technique may include user credentials, especially those sent over an insecure, unencrypted protocol.

02

Tags

attack.credential-accessattack.discoveryattack.t1040
03

Regelquelle (YAML)

title: Potential Packet Capture Activity Via Start-NetEventSession - ScriptBlock
id: da34e323-1e65-42db-83be-a6725ac2caa3
status: test
description: |
    Detects the execution of powershell scripts with calls to the "Start-NetEventSession" cmdlet. Which allows an attacker to start event and packet capture for a network event session.
    Adversaries may attempt to capture network to gather information over the course of an operation.
    Data captured via this technique may include user credentials, especially those sent over an insecure, unencrypted protocol.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/5f866ca4517e837c4ea576e7309d0891e78080a8/atomics/T1040/T1040.md#atomic-test-16---powershell-network-sniffing
    - https://github.com/0xsyr0/Awesome-Cybersecurity-Handbooks/blob/7b8935fe4c82cb64d61343de1a8b2e38dd968534/handbooks/10_post_exploitation.md
    - https://github.com/forgottentq/powershell/blob/9e616363d497143dc955c4fdce68e5c18d28a6cb/captureWindows-Endpoint.ps1#L13
author: frack113
date: 2024-05-12
tags:
    - attack.credential-access
    - attack.discovery
    - attack.t1040
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains: 'Start-NetEventSession'
    condition: selection
falsepositives:
    - Legitimate network diagnostic scripts.
level: medium
regression_tests_path: regression_data/rules/windows/powershell/powershell_script/posh_ps_packet_capture/info.yml
04

erkennt Techniken (1)

ATT&CK-Techniken, die dies ermöglicht oder abbildet.

05

Referenzen

Externe Belege — Patches, Meldungen, Analysen.