Query: Sigma rule for Detects persistence via Visual Studio Tools for Office (VSTO) add-ins in Office applications.
Matching passage: Sigma rule: Detects persistence via Visual Studio Tools for Office (VSTO) add-ins in Office applications.. Logsource: windows / registry_set. Rule: title: Potential Persistence Via Visual Studio Tools for Office id: 9d15044a-7cfe-4d23-8085-6ebc11df7685 status: test description: Detects persistence via Visual Studio Tools for Office (VSTO) add-ins in Office applications. references: - https://twitter.com/_vivami/status/1347925307643355138 - https://vanmieghem.io/stealth-outlook-persistence/ author: Bhabesh Raj date: 2021-01-10 modified: 2026-01-09 tags: - attack.t1137.006 - attack.persistence logsource: category: registry_set product: windows detection: selection: TargetObject|contains: - \Software\Microsoft\Office\Outlook\Addins\ - \Software\Microsoft\Office\Word\Addins\ - \Software\Microsoft\Office\Excel\Addins\ - \Software\Microsoft\Office\Powerpoint\Addins\ - \Software\Microsoft\VSTO\Security\Inclusion\ filter_main_system: Image: - C:\Windows\System32\msiexec.exe - C:\Windows\SysWOW64\msiexec.exe - C:\Windows\System32\regsvr32.exe - C:\Windows\SysWOW64\regsvr32.exe filter_main_office_click_to_run: Image|startswith: - C:\Program Files\Common Files (x86)\Microsoft Shared\ClickToRun\ - C:\Program Files\Common Files\Microsoft Shared\ClickToRun\ Image|endswith: \OfficeClickToRun.exe filter_main_integrator: Image: - C:\Program Files (x86)\Microsoft Office\root\integration\integrator.exe - C:\Program Files\Microsoft Office\root\integration\integrator.exe filter_main_office_apps: Image|startswith: - C:\Program Files\Microsoft Office\OFFICE - C:\Program Files (x86)\Microsoft Office\OFFICE - C:\Program Files\Microsoft Office\Root\OFFICE - C:\Program Files (x86)\Microsoft Office\Root\OFFICE - C:\PROGRA~2\MICROS~2\Office Image|endswith: - \excel.exe - \Integrator.exe - \OneNote.exe - \outlook.exe - \powerpnt.exe - \Teams.exe - \visio.exe - \winword.exe filter_main_vsto: Image|startswith: - C:\Program Files\Common Files\Microsoft Shared\VSTO\ - C:\Program Files (x86)\Microsoft Shared\VSTO\ Image|endswith: \VSTOInstaller.exe filter_optional_avg: Image: - C:\Program Files\AVG\Antivirus\RegSvr.exe - C:\Program Files (x86)\AVG\Antivirus\RegSvr.exe TargetObject|contains: \Microsoft\Office\Outlook\Addins\Antivirus.AsOutExt\ filter_optional_avast: Image: - C:\Program Files\Avast Software\Avast\RegSvr.exe - C:\Program Files (x86)\Avast Software\Avast\RegSvr.exe TargetObject|contains: \Microsoft\Office\Outlook\Addins\Avast.AsOutExt\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate Addin Installation level: medium
Near-miss passage: Sigma rule: Detects potentially suspicious child processes of WinRAR.exe.. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Child Process Of WinRAR.EXE id: 146aace8-9bd6-42ba-be7a-0070d8027b76 related: - id: ec3a3c2f-9bb0-4a9b-8f4b-5ec386544343 type: similar status: test description: Detects potentially suspicious child processes of WinRAR.exe. references: - https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/ - https://github.com/knight0x07/WinRAR-Code-Execution-Vulnerability-CVE-2023-38831/blob/26ab6c40b6d2c09bb4fc60feaa4a3a90cfd20c23/Part-1-Overview.md author: Nasreddine Bencherchali (Nextron Systems) date: 2023-08-31 tags: - attack.execution - attack.t1203 logsource: category: process_creation product: windows detection: selection_parent: ParentImage|endswith: \WinRAR.exe selection_binaries: - Image|endswith: - \cmd.exe - \cscript.exe - \mshta.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \rundll32.exe - \wscript.exe - OriginalFileName: - Cmd.Exe - cscript.exe - mshta.exe - PowerShell.EXE - pwsh.dll - regsvr32.exe - RUNDLL32.EXE - wscript.exe condition: all of selection_* falsepositives: - Unknown level: medium