PowerShell Remote Session Creation

Adversaries may abuse PowerShell commands and scripts for execution. PowerShell is a powerful interactive command-line interface and scripting environment included in the Windows operating system

Sigma rule (View on GitHub)

 1title: PowerShell Remote Session Creation
 2id: a0edd39f-a0c6-4c17-8141-261f958e8d8f
 3status: test
 4description: |
 5    Adversaries may abuse PowerShell commands and scripts for execution.
 6    PowerShell is a powerful interactive command-line interface and scripting environment included in the Windows operating system    
 7references:
 8    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1059.001/T1059.001.md#atomic-test-10---powershell-invoke-downloadcradle
 9    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/new-pssession?view=powershell-7.4
10author: frack113
11date: 2022/01/06
12modified: 2023/01/02
13tags:
14    - attack.execution
15    - attack.t1059.001
16logsource:
17    product: windows
18    category: ps_script
19    definition: 'Requirements: Script Block Logging must be enabled'
20detection:
21    selection:
22        ScriptBlockText|contains|all:
23            - 'New-PSSession'
24            - '-ComputerName '
25    condition: selection
26falsepositives:
27    - Legitimate administrative script
28level: medium

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