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PowerShell Script with Token Impersonation Capabilities
editPowerShell Script with Token Impersonation Capabilities
editDetects 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 guide
editRule query
editevent.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 mapping
editFramework: 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/