Powershell load assembly from internet

 1title: Powershell load assembly from internet
 2status: experimental
 3description: Powershell load assembly from internet
 4author: Joe Security
 5date: 2020-02-19
 6id: 200057
 7threatname:
 8behaviorgroup: 1
 9classification: 8
10mitreattack:
11
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        CommandLine:
18            - '*powershell*[reflection.assembly]::load((new-object net.webclient).downloaddata(*'
19    condition: selection
20level: critical