Query: write Sigma for Detects the image load of vss_ps.dll by uncommon executables. This DLL is used by the Volume Shadow Copy Service (VSS) t
Matching passage: Sigma rule: Detects the image load of vss_ps.dll by uncommon executables. This DLL is used by the Volume Shadow Copy Service (VSS) t. Logsource: windows / image_load. Rule: title: Suspicious Volume Shadow Copy VSS_PS.dll Load id: 333cdbe8-27bb-4246-bf82-b41a0dca4b70 related: - id: 48bfd177-7cf2-412b-ad77-baf923489e82 type: similar - id: 37774c23-25a1-4adb-bb6d-8bb9fd59c0f8 type: similar status: test description: 'Detects the image load of vss_ps.dll by uncommon executables. This DLL is used by the Volume Shadow Copy Service (VSS) to manage shadow copies of files and volumes. It is often abused by attackers to delete or manipulate shadow copies, which can hinder forensic investigations and data recovery efforts. The fact that it is loaded by processes that are not typically associated with VSS operations can indicate suspicious activity. ' references: - https://www.virustotal.com/gui/file/ba88ca45589fae0139a40ca27738a8fc2dfbe1be5a64a9558f4e0f52b35c5add - https://twitter.com/am0nsec/status/1412232114980982787 author: Markus Neis, @markus_neis date: 2021-07-07 modified: 2025-07-11 tags: - attack.impact - attack.t1490 logsource: category: image_load product: windows detection: selection: ImageLoaded|endswith: \vss_ps.dll filter_main_legit: Image|startswith: C:\Windows\ Image|endswith: - \clussvc.exe - \dismhost.exe - \dllhost.exe - \inetsrv\appcmd.exe - \inetsrv\iissetup.exe - \msiexec.exe - \rundll32.exe - \searchindexer.exe - \srtasks.exe - \svchost.exe - \System32\SystemPropertiesAdvanced.exe - \taskhostw.exe - \thor.exe - \thor64.exe - \tiworker.exe - \vssvc.exe - \vssadmin.exe - \WmiPrvSE.exe - \wsmprovhost.exe filter_main_update: CommandLine|startswith: C:\$WinREAgent\Scratch\ CommandLine|contains: \dismhost.exe { filter_main_image_null: Image: null filter_optional_programfiles: Image|startswith: - C:\Program Files\ - C:\Program Files (x86)\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects execution of the Impersonate tool. Which can be used to manipulate tokens on a Windows computers remotely (PsExe. Logsource: windows / process_creation. Rule: title: HackTool - Impersonate Execution id: cf0c254b-22f1-4b2b-8221-e137b3c0af94 status: test description: Detects execution of the Impersonate tool. Which can be used to manipulate tokens on a Windows computers remotely (PsExec/WmiExec) or interactively references: - https://sensepost.com/blog/2022/abusing-windows-tokens-to-compromise-active-directory-without-touching-lsass/ - https://github.com/sensepost/impersonate author: Sai Prashanth Pulisetti @pulisettis date: 2022-12-21 modified: 2024-11-23 tags: - attack.privilege-escalation - attack.stealth - attack.t1134.001 - attack.t1134.003 logsource: product: windows category: process_creation detection: selection_commandline_exe: CommandLine|contains: impersonate.exe selection_commandline_opt: CommandLine|contains: - ' list ' - ' exec ' - ' adduser ' selection_hash: Hashes|contains: - MD5=9520714AB576B0ED01D1513691377D01 - SHA256=E81CC96E2118DC4FBFE5BAD1604E0AC7681960143E2101E1A024D52264BB0A8A - IMPHASH=0A358FFC1697B7A07D0E817AC740DF62 condition: all of selection_commandline_* or selection_hash falsepositives: - Unknown level: medium