Detection rules › Sigma
Network Connection Initiated By Regsvr32.EXE
Detects a network connection initiated by "Regsvr32.exe"
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 3: Network connection |
Rule body
title: Network Connection Initiated By Regsvr32.EXE
id: c7e91a02-d771-4a6d-a700-42587e0b1095
status: test
description: Detects a network connection initiated by "Regsvr32.exe"
references:
- 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: Dmitriy Lifanov, oscd.community
date: 2019-10-25
modified: 2023-09-18
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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Initiated: 'true'
Image|endswith: '\regsvr32.exe'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\regsvr32.exe" |
Initiated | eq |
| field:"Initiated" kind:eq value:"true" |