Detectionhightest

PUA - NirCmd Execution As LOCAL SYSTEM

Detects the use of NirCmd tool for command execution as SYSTEM user

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Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)Created Mon Jan 24Updated Mon Feb 13d9047477-0359-48c9-b8c7-792cedcdc9c4windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        CommandLine|contains: ' runassystem '
    condition: selection

False Positives

Legitimate use by administrators

References

MITRE ATT&CK

Tactics

Sub-techniques

Software

Rule Metadata

Rule ID

d9047477-0359-48c9-b8c7-792cedcdc9c4

Status

test

Level

high

Type

Detection

Created

Mon Jan 24

Modified

Mon Feb 13

Author

Path

rules/windows/process_creation/proc_creation_win_pua_nircmd_as_system.yml

Raw Tags

attack.executionattack.t1569.002attack.s0029