IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
PowerShell Script with Token Impersonation Capabilitiesedit
Detects scripts that contain PowerShell functions, structures, or Windows API functions related to token impersonation/theft. Attackers may duplicate then impersonate another user’s token to escalate privileges and bypass access controls.
Rule type: query
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://github.com/decoder-it/psgetsystem
- https://github.com/PowerShellMafia/PowerSploit/blob/master/Privesc/Get-System.ps1
- https://github.com/EmpireProject/Empire/blob/master/data/module_source/privesc/Invoke-MS16032.ps1
- https://github.com/atc-project/atc-data/blob/master/docs/Logging_Policies/LP_0109_windows_powershell_script_block_log.md
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Privilege Escalation
Version: 1
Added (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
event.category:process and powershell.file.script_block_text:(
"Invoke-TokenManipulation" or "ImpersonateNamedPipeClient" or
"NtImpersonateThread" or ( "STARTUPINFOEX" and
"UpdateProcThreadAttribute" ) or (
"AdjustTokenPrivileges" and "SeDebugPrivilege" ) or (
("DuplicateToken" or "DuplicateTokenEx") and
("SetThreadToken" or "ImpersonateLoggedOnUser" or
"CreateProcessWithTokenW" or "CreatePRocessAsUserW" or
"CreateProcessAsUserA") ) )
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Access Token Manipulation
- ID: T1134
- Reference URL: https://attack.mitre.org/techniques/T1134/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/