Techniques
Sample rules
Get-DomainTrust with PowerShell Script Block
- source: splunk
- technicques:
- T1482
Description
The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify suspicious PowerShell execution. Script Block Logging captures the command sent to PowerShell, the full command to be executed. Upon enabling, logs will output to Windows event logs. Dependent upon volume, enable on critical endpoints or all.
This analytic identifies Get-DomainTrust from PowerView in order to gather domain trust information. During triage, review parallel processes using an EDR product or 4688 events. It will be important to understand the timeline of events around this activity. Review the entire logged PowerShell script block.
Detection logic
`powershell` EventCode=4104 ScriptBlockText = "*get-domaintrust*"
| stats count min(_time) as firstTime max(_time) as lastTime by Opcode Computer UserID EventCode ScriptBlockText
| rename Computer as dest
| rename UserID as user
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `get_domaintrust_with_powershell_script_block_filter`