Query: detect Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, P in logs
Matching passage: Sigma rule: Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, P. Logsource: windows / process_creation. Rule: title: Suspicious Binary In User Directory Spawned From Office Application id: aa3a6f94-890e-4e22-b634-ffdfd54792cc status: test description: Detects an executable in the users directory started from one of the Microsoft Office suite applications (Word, Excel, PowerPoint, Publisher, Visio) references: - https://blog.morphisec.com/fin7-not-finished-morphisec-spots-new-campaign - https://www.virustotal.com/gui/file/23160972c6ae07f740800fa28e421a81d7c0ca5d5cab95bc082b4a986fbac57 author: Jason Lynch date: 2019-04-02 modified: 2023-02-04 tags: - attack.execution - attack.t1204.002 - attack.g0046 - car.2013-05-002 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: - \WINWORD.EXE - \EXCEL.EXE - \POWERPNT.exe - \MSPUB.exe - \VISIO.exe - \MSACCESS.exe - \EQNEDT32.exe Image|startswith: C:\users\ Image|endswith: .exe filter: Image|endswith: \Teams.exe condition: selection and not filter falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects usage of known powershell cmdlets such as "Clear-EventLog" to clear the Windows event logs. Logsource: windows / ps_script. Rule: title: Suspicious Eventlog Clear id: 0f017df3-8f5a-414f-ad6b-24aff1128278 related: - id: cc36992a-4671-4f21-a91d-6c2b72a2edf5 type: derived status: test description: Detects usage of known powershell cmdlets such as "Clear-EventLog" to clear the Windows event logs references: - https://twitter.com/oroneequalsone/status/1568432028361830402 - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.001/T1070.001.md - https://eqllib.readthedocs.io/en/latest/analytics/5b223758-07d6-4100-9e11-238cfdd0fe97.html - https://stackoverflow.com/questions/66011412/how-to-clear-a-event-log-in-powershell-7 - https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.eventing.reader.eventlogsession.clearlog?view=windowsdesktop-9.0&viewFallbackFrom=dotnet-plat-ext-5.0#System_Diagnostics_Eventing_Reader_EventLogSession_ClearLog_System_String_ - https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.eventlog.clear author: Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) date: 2022-09-12 modified: 2025-10-06 tags: - attack.defense-impairment - attack.t1685.005 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection: - ScriptBlockText|contains: - 'Clear-EventLog ' - 'Remove-EventLog ' - 'Limit-EventLog ' - 'Clear-WinEvent ' - ScriptBlockText|contains|all: - Eventing.Reader.EventLogSession - ClearLog - ScriptBlockText|contains|all: - Diagnostics.EventLog - Clear condition: selection falsepositives: - Rare need to clear logs before doing something. Sometimes used by installers or cleaner scripts. The script should be investigated to determine if it's legitimate level: medium