PowerShell Profile Modification

calendar Oct 28, 2023 · attack.persistence attack.privilege_escalation attack.t1546.013  ·
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Detects the creation or modification of a powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence

Sigma rule (View on GitHub)

 1title: PowerShell Profile Modification
 2id: b5b78988-486d-4a80-b991-930eff3ff8bf
 3status: test
 4description: Detects the creation or modification of a powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
 5references:
 6    - https://www.welivesecurity.com/2019/05/29/turla-powershell-usage/
 7    - https://persistence-info.github.io/Data/powershellprofile.html
 8author: HieuTT35, Nasreddine Bencherchali (Nextron Systems)
 9date: 2019/10/24
10modified: 2023/10/23
11tags:
12    - attack.persistence
13    - attack.privilege_escalation
14    - attack.t1546.013
15logsource:
16    product: windows
17    category: file_event
18detection:
19    selection:
20        TargetFilename|endswith:
21            - '\Microsoft.PowerShell_profile.ps1'
22            - '\PowerShell\profile.ps1'
23            - '\Program Files\PowerShell\7-preview\profile.ps1'
24            - '\Program Files\PowerShell\7\profile.ps1'
25            - '\Windows\System32\WindowsPowerShell\v1.0\profile.ps1'
26            - '\WindowsPowerShell\profile.ps1'
27    condition: selection
28falsepositives:
29    - System administrator creating Powershell profile manually
30level: medium

References

  • A dive into Turla PowerShell usage

    ESET researchers show how, in a bid to evade detection, the Turla group leverages PowerShell scripts to inject malware directly into memory.


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  • PowerShell Profile

    PowerShell Profile Location: $PSHOME\Profile.ps1 $PSHOME\Microsoft.PowerShell_profile.ps1 $Home\[My ]Documents\PowerShell\Profile.ps1 $Home\[My ]Documents\PowerShell\Microsoft.PowerShell_profile.ps...


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