PUA - NirCmd Execution As LOCAL SYSTEM

 1title: PUA - NirCmd Execution As LOCAL SYSTEM
 2id: d9047477-0359-48c9-b8c7-792cedcdc9c4
 3status: test
 4description: Detects the use of NirCmd tool for command execution as SYSTEM user
 5references:
 6    - https://www.nirsoft.net/utils/nircmd.html
 7    - https://www.winhelponline.com/blog/run-program-as-system-localsystem-account-windows/
 8    - https://www.nirsoft.net/utils/nircmd2.html#using
 9author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
10date: 2022-01-24
11modified: 2023-02-13
12tags:
13    - attack.execution
14    - attack.t1569.002
15    - attack.s0029
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        CommandLine|contains: ' runassystem '
22    condition: selection
23fields:
24    - CommandLine
25    - ParentCommandLine
26falsepositives:
27    - Legitimate use by administrators
28level: high

References

• NirCmd - Windows command line tool

  NirCmd is a small utility that allows you to do many useful tasks from command-line, without displaying any user interface: change your display settings, turn off your monitor, open the door of your CD-ROM drive, and more...

  
  Read More

• How to Run a Program as SYSTEM (LocalSystem) Account in Windows

  

  Many Windows system files, registry keys, and services are owned by the (a.k.a LocalSystem) account, which has a high privilege level. If you need to modify a registry key owned by the account…

  
  Read More

• NirCmd - Freeware command-line tool for Windows

  NirCmd v2.86 Copyright (c) 2003 - 2019 Nir Sofer Description NirCmd is a small command-line utility that allows you to do some useful tasks without displaying any user interface. By running NirCm...

  
  Read More

Related rules

• CSExec Service File Creation
• HackTool Service Registration or Execution
• PUA - NSudo Execution
• PUA - NirCmd Execution
• PUA - RunXCmd Execution