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.
34 lines
1.1 KiB
YAML
34 lines
1.1 KiB
YAML
title: Suspicious PowerShell Download - Powershell Script
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id: 403c2cc0-7f6b-4925-9423-bfa573bed7eb
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related:
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- id: 65531a81-a694-4e31-ae04-f8ba5bc33759
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type: derived
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status: test
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description: Detects suspicious PowerShell download command
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references:
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- https://learn.microsoft.com/en-us/dotnet/api/system.net.webclient.downloadstring?view=net-8.0
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- https://learn.microsoft.com/en-us/dotnet/api/system.net.webclient.downloadfile?view=net-8.0
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author: Florian Roth (Nextron Systems)
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date: 2017-03-05
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modified: 2022-12-02
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tags:
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- attack.execution
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- attack.t1059.001
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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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webclient:
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ScriptBlockText|contains: 'System.Net.WebClient'
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download:
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ScriptBlockText|contains:
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- '.DownloadFile('
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- '.DownloadFileAsync('
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- '.DownloadString('
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- '.DownloadStringAsync('
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condition: webclient and download
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falsepositives:
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- PowerShell scripts that download content from the Internet
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level: medium
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