{"id":"631b22a4-70f4-4e2f-9ea8-42f84d9df6d8","title":"Suspicious AddinUtil.EXE CommandLine Execution","description":"Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with suspicious Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.\n","author":"Nasreddine Bencherchali (Nextron Systems), Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)","status":"test","level":"high","date":"2023-09-18","modified":"","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html"],"source_path":"rules/windows/process_creation/proc_creation_win_addinutil_suspicious_cmdline.yml","source_sha256":"12c76ba452ae792a111abde24c25ca83e4e25bc030e918e74e0fdb9c934be91d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_addinutil_suspicious_cmdline.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious AddinUtil.EXE CommandLine Execution\nid: 631b22a4-70f4-4e2f-9ea8-42f84d9df6d8\nstatus: test\ndescription: |\n    Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with suspicious Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.\nreferences:\n    - https://www.blue-prints.blog/content/blog/posts/lolbin/addinutil-lolbas.html\nauthor: Nasreddine Bencherchali (Nextron Systems), Michael McKinley (@McKinleyMike), Tony Latteri (@TheLatteri)\ndate: 2023-09-18\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith: '\\addinutil.exe'\n        - OriginalFileName: 'AddInUtil.exe'\n    selection_susp_1_flags:\n        CommandLine|contains:\n            - '-AddInRoot:'\n            - '-PipelineRoot:'\n    selection_susp_1_paths:\n        CommandLine|contains:\n            - '\\AppData\\Local\\Temp\\'\n            - '\\Desktop\\'\n            - '\\Downloads\\'\n            - '\\Users\\Public\\'\n            - '\\Windows\\Temp\\'\n    selection_susp_2:\n        CommandLine|contains:\n            - '-AddInRoot:.'\n            - '-AddInRoot:\".\"'\n            - '-PipelineRoot:.'\n            - '-PipelineRoot:\".\"'\n        CurrentDirectory|contains:\n            - '\\AppData\\Local\\Temp\\'\n            - '\\Desktop\\'\n            - '\\Downloads\\'\n            - '\\Users\\Public\\'\n            - '\\Windows\\Temp\\'\n    condition: selection_img and (all of selection_susp_1_* or selection_susp_2)\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/631b22a4-70f4-4e2f-9ea8-42f84d9df6d8.json","kind":"sigma"}