sigmaDRL-1.1from SigmaHQ/sigma

Suspicious PowerShell Download

Detects suspicious PowerShell download command

Quality

FP risk

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Forks

Views

ATT&CK techniques

T1059.001

Rule sourcerules/windows/powershell/powershell_classic/posh_pc_susp_download.yml

title: Suspicious PowerShell Download
id: 3236fcd0-b7e3-4433-b4f8-86ad61a9af2d
related:
    - id: 65531a81-a694-4e31-ae04-f8ba5bc33759
      type: derived
status: test
description: Detects suspicious PowerShell download command
references:
    - https://www.trendmicro.com/en_us/research/22/j/lv-ransomware-exploits-proxyshell-in-attack.html
author: Florian Roth (Nextron Systems)
date: 2017-03-05
modified: 2023-10-27
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_classic_start
detection:
    selection_webclient:
        Data|contains: 'Net.WebClient'
    selection_download:
        Data|contains:
            - '.DownloadFile('
            - '.DownloadString('
    condition: all of selection_*
falsepositives:
    - PowerShell scripts that download content from the Internet
level: medium