Query: detect Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with th in logs
Matching passage: Sigma rule: Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with th. Logsource: windows / process_creation. Rule: title: AgentExecutor PowerShell Execution id: 7efd2c8d-8b18-45b7-947d-adfe9ed04f61 related: - id: c0b40568-b1e9-4b03-8d6c-b096da6da9ab type: similar status: test description: Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with the ExecutionPolicy "Bypass" or any binary named "powershell.exe" located in the path provided by 6th positional argument author: Nasreddine Bencherchali (Nextron Systems), memory-shards references: - https://twitter.com/lefterispan/status/1286259016436514816 - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Agentexecutor/ - https://learn.microsoft.com/en-us/mem/intune/apps/intune-management-extension - https://twitter.com/jseerden/status/1247985304667066373/photo/1 date: 2022-12-24 modified: 2024-08-07 tags: - attack.stealth - attack.t1218 logsource: category: process_creation product: windows detection: selection_img: - Image: \AgentExecutor.exe - OriginalFileName: AgentExecutor.exe selection_cli: CommandLine|contains: - ' -powershell' - ' -remediationScript' filter_main_intune: ParentImage|endswith: \Microsoft.Management.Services.IntuneWindowsAgent.exe condition: all of selection_* and not 1 of filter_main_* falsepositives: - Legitimate use via Intune management. You exclude script paths and names to reduce FP rate level: medium
Near-miss passage: Sigma rule: Detects the creation of a file with an uncommon extension in an Office application startup folder. Logsource: windows / file_event. Rule: title: Uncommon File Created In Office Startup Folder id: a10a2c40-2c4d-49f8-b557-1a946bc55d9d status: test description: Detects the creation of a file with an uncommon extension in an Office application startup folder references: - https://app.any.run/tasks/d6fe6624-6ef8-485d-aa75-3d1bdda2a08c/ - http://addbalance.com/word/startup.htm - https://answers.microsoft.com/en-us/msoffice/forum/all/document-in-word-startup-folder-doesnt-open-when/44ab0932-2917-4150-8cdc-2f2cf39e86f3 - https://en.wikipedia.org/wiki/List_of_Microsoft_Office_filename_extensions author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2022-06-05 modified: 2023-12-13 tags: - attack.resource-development - attack.t1587.001 logsource: product: windows category: file_event detection: selection_word_paths: - TargetFilename|contains: \Microsoft\Word\STARTUP - TargetFilename|contains|all: - \Office - \Program Files - \STARTUP filter_exclude_word_ext: TargetFilename|endswith: - .docb - .docm - .docx - .dotm - .mdb - .mdw - .pdf - .wll - .wwl selection_excel_paths: - TargetFilename|contains: \Microsoft\Excel\XLSTART - TargetFilename|contains|all: - \Office - \Program Files - \XLSTART filter_exclude_excel_ext: TargetFilename|endswith: - .xll - .xls - .xlsm - .xlsx - .xlt - .xltm - .xlw filter_main_office_click_to_run: Image|contains: :\Program Files\Common Files\Microsoft Shared\ClickToRun\ Image|endswith: \OfficeClickToRun.exe filter_main_office_apps: Image|contains: - :\Program Files\Microsoft Office\ - :\Program Files (x86)\Microsoft Office\ Image|endswith: - \winword.exe - \excel.exe condition: ((selection_word_paths and not filter_exclude_word_ext) or (selection_excel_paths and not filter_exclude_excel_ext)) and not 1 of filter_main_* falsepositives: - False positive might stem from rare extensions used by other Office utilities. level: high