Network Connection Initiated By AddinUtil.EXE

 1title: Network Connection Initiated By AddinUtil.EXE
 2id: 5205613d-2a63-4412-a895-3a2458b587b3
 3status: test
 4description: |
 5    Detects a network connection initiated by the Add-In deployment cache updating utility "AddInutil.exe".
 6    This could indicate a potential command and control communication as this tool doesn't usually initiate network activity.    
 7references:
 8    - https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html
 9author: Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)
10date: 2023/09/18
11modified: 2024/07/16
12tags:
13    - attack.defense_evasion
14    - attack.t1218
15logsource:
16    category: network_connection
17    product: windows
18detection:
19    selection:
20        Initiated: 'true'
21        Image|endswith: '\addinutil.exe'
22    condition: selection
23falsepositives:
24    - Unknown
25level: high