Query: Sigma rule for Detects Obfuscated Powershell via Stdin in Scripts
Matching passage: Sigma rule: Detects Obfuscated Powershell via Stdin in Scripts. Logsource: windows / ps_script. Rule: title: Invoke-Obfuscation Via Stdin - Powershell id: 86b896ba-ffa1-4fea-83e3-ee28a4c915c7 status: test description: Detects Obfuscated Powershell via Stdin in Scripts references: - https://github.com/SigmaHQ/sigma/issues/1009 author: Nikita Nazarov, oscd.community date: 2020-10-12 modified: 2024-04-05 tags: - attack.stealth - attack.t1027 - attack.execution - attack.t1059.001 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection_4104: ScriptBlockText|re: (?i)(set).*&&\s?set.*(environment|invoke|\$\{?input).*&&.*" condition: selection_4104 falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects modification of autostart extensibility point (ASEP) in registry. Adversaries may modify these keys to execute m. Logsource: windows / registry_set. Rule: title: Office Autorun Keys Modification id: baecf8fb-edbf-429f-9ade-31fc3f22b970 related: - id: 17f878b8-9968-4578-b814-c4217fc5768c type: obsolete status: test description: 'Detects modification of autostart extensibility point (ASEP) in registry. Adversaries may modify these keys to execute malicious code when Office files are opened. There are various legitimate add-ins that also use these keys and this filter list might not be exhaustive. Thus, it is recommended to review and tune filters for your environment to reduce false positives before deploying to production. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.001/T1547.001.md - https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns - https://gist.github.com/GlebSukhodolskiy/0fc5fa5f482903064b448890db1eaf9d author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split) date: 2019-10-25 modified: 2026-01-09 tags: - attack.privilege-escalation - attack.persistence - attack.t1547.001 logsource: category: registry_set product: windows detection: selection_office_root: TargetObject|contains: - \Software\Wow6432Node\Microsoft\Office - \Software\Microsoft\Office selection_office_details: TargetObject|contains: - \Word\Addins - \PowerPoint\Addins - \Outlook\Addins - \Onenote\Addins - \Excel\Addins - \Access\Addins - test\Special\Perf filter_main_empty: Details: (Empty) filter_main_null: Details: null filter_main_known_addins: Image|startswith: - C:\Program Files\Microsoft Office\ - C:\Program Files (x86)\Microsoft Office\ - C:\PROGRA~2\MICROS~2\Office - C:\Windows\System32\msiexec.exe - C:\Windows\SysWOW64\msiexec.exe - C:\Windows\System32\regsvr32.exe - 'C:\Windows\SysWOW64\regsvr32.exe ' TargetObject|contains: - \Excel\Addins\AdHocReportingExcelClientLib.AdHocReportingExcelClientAddIn.1\ - \Excel\Addins\ExcelPlugInShell.PowerMapConnect\ - \Excel\Addins\NativeShim\ - \Excel\Addins\NativeShim.InquireConnector.1\ - \Excel\Addins\PowerPivotExcelClientAddIn.NativeEntry.1\ - \Outlook\AddIns\AccessAddin.DC\ - \Outlook\AddIns\ColleagueImport.ColleagueImportAddin\ - \Outlook\AddIns\EvernoteCC.EvernoteContactConnector\ - \Outlook\AddIns\EvernoteOLRD.Connect\ - \Outlook\Addins\\OneNote.OutlookAddin - \Outlook\Addins\DriveFSExtensionLib.Connect\ - \Outlook\Addins\GoogleAppsSync.Connect\ - \Outlook\Addins\Microsoft.VbaAddinForOutlook.1\ - \Outlook\Addins\OcOffice.OcFo