Detectionmediumtest
User Discovery And Export Via Get-ADUser Cmdlet
Detects usage of the Get-ADUser cmdlet to collect user information and output it to a file
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Nasreddine Bencherchali (Nextron Systems)Created Fri Sep 09Updated Thu Nov 171114e048-b69c-4f41-bc20-657245ae6e3fwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
- OriginalFileName:
- 'PowerShell.EXE'
- 'pwsh.dll'
selection_cli:
CommandLine|contains|all:
- 'Get-ADUser '
- ' -Filter \*'
CommandLine|contains:
- ' > '
- ' | Select '
- 'Out-File'
- 'Set-Content'
- 'Add-Content'
condition: all of selection_*False Positives
Legitimate admin scripts may use the same technique, it's better to exclude specific computers or users who execute these commands or scripts often
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
1114e048-b69c-4f41-bc20-657245ae6e3f
Status
test
Level
medium
Type
Detection
Created
Fri Sep 09
Modified
Thu Nov 17
Path
rules/windows/process_creation/proc_creation_win_powershell_user_discovery_get_aduser.yml
Raw Tags
attack.discoveryattack.t1033