title: Meterpreter or Cobalt Strike Getsystem Service Installation - System
id: 843544a7-56e0-4dcc-a44f-5cc266dd97d6
status: test
description: Detects the use of getsystem Meterpreter/Cobalt Strike command by detecting a specific service installation
references:
- https://speakerdeck.com/heirhabarov/hunting-for-privilege-escalation-in-windows-environment
- https://blog.cobaltstrike.com/2014/04/02/what-happens-when-i-type-getsystem/
author: Teymur Kheirkhabarov, Ecco, Florian Roth (Nextron Systems)
date: 2019-10-26
modified: 2023-11-15
tags:
- attack.privilege-escalation
- attack.stealth
- attack.t1134.001
- attack.t1134.002
logsource:
product: windows
service: system
detection:
selection_id:
Provider_Name: 'Service Control Manager'
EventID: 7045
selection_cli_cmd:
# meterpreter getsystem technique 1: cmd.exe /c echo 559891bb017 > \\.\pipe\5e120a
# cobaltstrike getsystem technique 1: %COMSPEC% /c echo 559891bb017 > \\.\pipe\5e120a
# cobaltstrike getsystem technique 1b (expanded %COMSPEC%): %COMSPEC% /c echo 559891bb017 > \\.\pipe\5e120a
ImagePath|contains|all:
- '/c'
- 'echo'
- '\pipe\'
ImagePath|contains:
- 'cmd'
- '%COMSPEC%'
selection_cli_rundll:
# meterpreter getsystem technique 2: rundll32.exe C:\Users\test\AppData\Local\Temp\tmexsn.dll,a /p:tmexsn
ImagePath|contains|all:
- 'rundll32'
- '.dll,a'
- '/p:'
selection_cli_share:
ImagePath|startswith: '\\\\127.0.0.1\\ADMIN$\' # https://twitter.com/svch0st/status/1413688851877416960?lang=en
condition: selection_id and 1 of selection_cli_*
falsepositives:
- Unlikely
level: high