{"id":"5205613d-2a63-4412-a895-3a2458b587b3","title":"Network Connection Initiated By AddinUtil.EXE","description":"Detects a network connection initiated by the Add-In deployment cache updating utility \"AddInutil.exe\".\nThis could indicate a potential command and control communication as this tool doesn't usually initiate network activity.\n","author":"Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)","status":"test","level":"high","date":"2023-09-18","modified":"2024-07-16","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"category":"network_connection","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html"],"source_path":"rules/windows/network_connection/net_connection_win_addinutil_initiated.yml","source_sha256":"e61bde802e1c227cc22dfcb407c520fd52228bd6a4e825a516901762e1f6df1a","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_addinutil_initiated.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Network Connection Initiated By AddinUtil.EXE\nid: 5205613d-2a63-4412-a895-3a2458b587b3\nstatus: test\ndescription: |\n    Detects a network connection initiated by the Add-In deployment cache updating utility \"AddInutil.exe\".\n    This could indicate a potential command and control communication as this tool doesn't usually initiate network activity.\nreferences:\n    - https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html\nauthor: Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)\ndate: 2023-09-18\nmodified: 2024-07-16\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    category: network_connection\n    product: windows\ndetection:\n    selection:\n        Initiated: 'true'\n        Image|endswith: '\\addinutil.exe'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"}],"data_path":"data/detection-rules/5205613d-2a63-4412-a895-3a2458b587b3.json","kind":"sigma"}