Detection rules › Sigma
Network Connection Initiated By AddinUtil.EXE
Detects a network connection initiated by the Add-In deployment cache updating utility "AddInutil.exe". This could indicate a potential command and control communication as this tool doesn't usually initiate network activity.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1218 System Binary Proxy Execution |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 3 | Network connection |
Rule body yaml
title: Network Connection Initiated By AddinUtil.EXE
id: 5205613d-2a63-4412-a895-3a2458b587b3
status: test
description: |
Detects a network connection initiated by the Add-In deployment cache updating utility "AddInutil.exe".
This could indicate a potential command and control communication as this tool doesn't usually initiate network activity.
references:
- https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html
author: Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)
date: 2023-09-18
modified: 2024-07-16
tags:
- attack.stealth
- attack.t1218
logsource:
category: network_connection
product: windows
detection:
selection:
Initiated: 'true'
Image|endswith: '\addinutil.exe'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Initiated: 'true'
Image|endswith: '\addinutil.exe'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.