Suspicious TCP Tunnel Via PowerShell Script

calendar Aug 12, 2024 · attack.command-and-control attack.t1090  ·
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Detects powershell scripts that creates sockets/listeners which could be indicative of tunneling activity

Sigma rule (View on GitHub)

 1title: Suspicious TCP Tunnel Via PowerShell Script
 2id: bd33d2aa-497e-4651-9893-5c5364646595
 3status: test
 4description: Detects powershell scripts that creates sockets/listeners which could be indicative of tunneling activity
 5references:
 6    - https://github.com/Arno0x/PowerShellScripts/blob/a6b7d5490fbf0b20f91195838f3a11156724b4f7/proxyTunnel.ps1
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022-07-08
 9tags:
10    - attack.command-and-control
11    - attack.t1090
12logsource:
13    product: windows
14    category: ps_script
15    definition: 'Requirements: Script Block Logging must be enabled'
16detection:
17    selection:
18        ScriptBlockText|contains|all:
19            - '[System.Net.HttpWebRequest]'
20            - 'System.Net.Sockets.TcpListener'
21            - 'AcceptTcpClient'
22    condition: selection
23falsepositives:
24    - Unknown
25level: medium

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