Sigma rule: PUA - NSudo Execution

Rule

Title

PUA - NSudo Execution

Status

test

Level

high

Author

Florian Roth (Nextron Systems), Nasreddine Bencherchali

Date

2022-01-24

Modified

2023-02-13

File

rules/windows/process_creation/proc_creation_win_pua_nsudo.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of NSudo tool for command execution

Log source

product

windows

category

process_creation

Detection

selection_img:
    - Image|endswith:
          - '\NSudo.exe'
          - '\NSudoLC.exe'
          - '\NSudoLG.exe'
    - OriginalFileName:
          - 'NSudo.exe'
          - 'NSudoLC.exe'
          - 'NSudoLG.exe'
selection_cli:
    CommandLine|contains:
        # Covers Single/Double dash "-"/"--" + ":"
        - '-U:S ' # System
        - '-U:T ' # Trusted Installer
        - '-U:E ' # Elevated
        - '-P:E ' # Enable All Privileges
        - '-M:S ' # System Integrity
        - '-M:H ' # High Integrity
        # Covers Single/Double dash "-"/"--" + "="
        - '-U=S '
        - '-U=T '
        - '-U=E '
        - '-P=E '
        - '-M=S '
        - '-M=H '
        - '-ShowWindowMode:Hide'
condition: all of selection_*

False positives (as the rule lists them)

• Legitimate use by administrators

Tags

• attack.execution
• attack.t1569.002
• attack.s0029

MITRE ATT&CK ids this rule names

• S0029
• T1569.002

References

• https://web.archive.org/web/20221019044836/https://nsudo.m2team.org/en-us/
• https://www.winhelponline.com/blog/run-program-as-system-localsystem-account-windows/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_nsudo.yml