Cisco Umbrella - Windows PowerShell User-Agent Detected

Description

'Rule helps to detect Powershell user-agent activity by an unusual process other than a web browser.'

Query · kql

let timeframe = 15m;
Cisco_Umbrella
| where EventType == "proxylogs"
| where TimeGenerated > ago(timeframe)
| where HttpUserAgentOriginal contains "WindowsPowerShell"
| extend Message = "Windows PowerShell User Agent"
| project Message, SrcIpAddr, DstIpAddr, UrlOriginal, TimeGenerated,HttpUserAgentOriginal
Raw source Cisco Umbrella - Windows PowerShell User-Agent Detected · KQL
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Published by Azure/Azure-Sentinel ↗, licensed under MIT ↗. Reproduced here unmodified. 
id: b12b3dab-d973-45af-b07e-e29bb34d8db9
name: Cisco Umbrella - Windows PowerShell User-Agent Detected
description: |
  'Rule helps to detect Powershell user-agent activity by an unusual process other than a web browser.'
severity: Medium
requiredDataConnectors:
  - connectorId: CiscoUmbrellaDataConnector
    dataTypes:
      - Cisco_Umbrella_proxy_CL
queryFrequency: 15m
queryPeriod: 15m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - CommandAndControl
  - DefenseEvasion
query: |
  let timeframe = 15m;
  Cisco_Umbrella
  | where EventType == "proxylogs"
  | where TimeGenerated > ago(timeframe)
  | where HttpUserAgentOriginal contains "WindowsPowerShell"
  | extend Message = "Windows PowerShell User Agent"
  | project Message, SrcIpAddr, DstIpAddr, UrlOriginal, TimeGenerated,HttpUserAgentOriginal
entityMappings:
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: UrlOriginal
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr
version: 1.1.2
kind: Scheduled

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