rules/windows/powershell/powershell_script/posh_ps_susp_download.yml

title: Suspicious PowerShell Download - Powershell Script
id: 403c2cc0-7f6b-4925-9423-bfa573bed7eb
related:
    - id: 65531a81-a694-4e31-ae04-f8ba5bc33759
      type: derived
status: experimental
description: Detects suspicious PowerShell download command
author: Florian Roth (Nextron Systems)
date: 2017/03/05
modified: 2022/12/02
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    webclient:
        ScriptBlockText|contains: 'System.Net.WebClient'
    download:
        ScriptBlockText|contains:
            - '.DownloadFile('
            - '.DownloadString('
    condition: webclient and download
falsepositives:
    - PowerShell scripts that download content from the Internet
level: medium
$frack113$ Update title (#3746 ) 2022-12-02 18:10:43 +01:00			`title: Suspicious PowerShell Download - Powershell Script`
$frack113$ add ps_script verison 2021-10-18 14:13:29 +02:00			`id: 403c2cc0-7f6b-4925-9423-bfa573bed7eb`
			`related:`
			`- id: 65531a81-a694-4e31-ae04-f8ba5bc33759`
			`type: derived`
			`status: experimental`
			`description: Detects suspicious PowerShell download command`
chore: add nextron authors tag 2023-02-01 11:14:59 +01:00			`author: Florian Roth (Nextron Systems)`
$frack113$ add ps_script verison 2021-10-18 14:13:29 +02:00			`date: 2017/03/05`
$frack113$ Update title (#3746 ) 2022-12-02 18:10:43 +01:00			`modified: 2022/12/02`
$frack113$ Order yaml field 2022-10-26 09:43:39 +02:00			`tags:`
			`- attack.execution`
			`- attack.t1059.001`
$frack113$ add ps_script verison 2021-10-18 14:13:29 +02:00			`logsource:`
			`product: windows`
			`category: ps_script`
feat: updates and enhancements 2023-01-04 17:49:32 +01:00			`definition: 'Requirements: Script Block Logging must be enabled'`
$frack113$ add ps_script verison 2021-10-18 14:13:29 +02:00			`detection:`
			`webclient:`
$frack113$ cleanup list 2021-10-18 14:52:35 +02:00			`ScriptBlockText\|contains: 'System.Net.WebClient'`
$frack113$ add ps_script verison 2021-10-18 14:13:29 +02:00			`download:`
			`ScriptBlockText\|contains:`
			`- '.DownloadFile('`
			`- '.DownloadString('`
			`condition: webclient and download`
			`falsepositives:`
			`- PowerShell scripts that download content from the Internet`
$frack113$ Order yaml field 2022-10-26 09:43:39 +02:00			`level: medium`