Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
29 lines
1.4 KiB
YAML
29 lines
1.4 KiB
YAML
title: Potential Packet Capture Activity Via Start-NetEventSession - ScriptBlock
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id: da34e323-1e65-42db-83be-a6725ac2caa3
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status: experimental
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description: |
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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.
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Adversaries may attempt to capture network to gather information over the course of an operation.
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Data captured via this technique may include user credentials, especially those sent over an insecure, unencrypted protocol.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/5f866ca4517e837c4ea576e7309d0891e78080a8/atomics/T1040/T1040.md#atomic-test-16---powershell-network-sniffing
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- https://github.com/0xsyr0/Awesome-Cybersecurity-Handbooks/blob/7b8935fe4c82cb64d61343de1a8b2e38dd968534/handbooks/10_post_exploitation.md
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- https://github.com/forgottentq/powershell/blob/9e616363d497143dc955c4fdce68e5c18d28a6cb/captureWindows-Endpoint.ps1#L13
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author: frack113
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date: 2024-05-12
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tags:
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- attack.credential-access
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- attack.discovery
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- attack.t1040
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logsource:
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product: windows
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category: ps_script
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definition: 'Requirements: Script Block Logging must be enabled'
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detection:
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selection:
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ScriptBlockText|contains: 'Start-NetEventSession'
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condition: selection
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falsepositives:
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- Legitimate network diagnostic scripts.
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level: medium
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