Possible Application Whitelisting Bypass through Dnx.EXE (via process_creation)

title: Possible Application Whitelisting Bypass through Dnx.EXE (via process_creation)
id: dc9b7e26-0df0-51b1-b161-d4cb2cd85469
status: stable
description: This rule detects the execution of Dnx.EXE. The Dnx utility enables for the execution of C# code. Attackers might misuse this to bypass application whitelisting.
references:
    - https://attack.mitre.org/techniques/T1027/004/
    - https://attack.mitre.org/techniques/T1218/
    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Csi/
    - https://enigma0x3.net/2016/11/17/bypassing-application-whitelisting-by-using-dnx-exe/
author: Huntrule Team
date: 2026-01-11
tags:
    - attack.stealth
    - attack.t1218
    - attack.t1027.004
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\dnx.exe'
    condition: selection
falsepositives:
    - Unknown
level: medium