Suspicious Network Connection Initiated By Regsvr32.EXE (via network_connection)

title: Suspicious Network Connection Initiated By Regsvr32.EXE (via network_connection)
id: e4b94469-5241-5704-b9a1-558bbed2e584
status: stable
description: This rule detects a network connection initiated by "Regsvr32.exe"
references:
    - https://attack.mitre.org/techniques/T1218/010/
    - https://attack.mitre.org/techniques/T1559/001/
    - https://pentestlab.blog/2017/05/11/applocker-bypass-regsvr32/
    - https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/
author: Huntrule Team
date: 2026-07-24
tags:
    - attack.execution
    - attack.stealth
    - attack.t1559.001
    - attack.t1218.010
logsource:
    category: network_connection
    product: windows
detection:
    selection:
        Initiated: 'true'
        Image|endswith: '\regsvr32.exe'
    condition: selection
falsepositives:
    - Unknown
level: medium