Query: Sigma rule for Detects potential mimikatz-like tools accessing LSASS from non system account
Matching passage: Sigma rule: Detects potential mimikatz-like tools accessing LSASS from non system account. Logsource: windows / security. Rule: title: LSASS Access From Non System Account id: 962fe167-e48d-4fd6-9974-11e5b9a5d6d1 status: test description: Detects potential mimikatz-like tools accessing LSASS from non system account references: - https://threathunterplaybook.com/hunts/windows/170105-LSASSMemoryReadAccess/notebook.html author: Roberto Rodriguez @Cyb3rWard0g date: 2019-06-20 modified: 2023-12-11 tags: - attack.credential-access - attack.t1003.001 logsource: product: windows service: security detection: selection: EventID: - 4663 - 4656 AccessMask: - '0x100000' - '0x1010' - '0x1400' - '0x1410' - '0x1418' - '0x1438' - '0x143a' - '0x1f0fff' - '0x1f1fff' - '0x1f2fff' - '0x1f3fff' - '0x40' - 143a - 1f0fff - 1f1fff - 1f2fff - 1f3fff ObjectType: Process ObjectName|endswith: \lsass.exe filter_main_service_account: SubjectUserName|endswith: $ filter_main_generic: ProcessName|contains: - :\Program Files\ - :\Program Files (x86)\ filter_main_wmiprvse: ProcessName: C:\Windows\System32\wbem\WmiPrvSE.exe AccessMask: '0x1410' filter_optional_steam: ProcessName|contains: \SteamLibrary\steamapps\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects uncommon "userinit.exe" child processes, which could be a sign of uncommon shells or login scripts used for pers. Logsource: windows / process_creation. Rule: title: Uncommon Userinit Child Process id: 0a98a10c-685d-4ab0-bddc-b6bdd1d48458 related: - id: 21d856f9-9281-4ded-9377-51a1a6e2a432 type: similar status: test description: Detects uncommon "userinit.exe" child processes, which could be a sign of uncommon shells or login scripts used for persistence. references: - https://cocomelonc.github.io/persistence/2022/12/09/malware-pers-20.html - https://learn.microsoft.com/en-us/windows-server/administration/server-core/server-core-sconfig#powershell-is-the-default-shell-on-server-core author: Tom Ueltschi (@c_APT_ure), Tim Shelton date: 2019-01-12 modified: 2023-11-14 tags: - attack.privilege-escalation - attack.t1037.001 - attack.persistence logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: \userinit.exe filter_main_explorer: Image|endswith: :\WINDOWS\explorer.exe filter_optional_logonscripts: CommandLine|contains: - netlogon.bat - UsrLogon.cmd filter_optional_windows_core: CommandLine: PowerShell.exe filter_optional_proquota: Image|endswith: - :\Windows\System32\proquota.exe - :\Windows\SysWOW64\proquota.exe filter_optional_citrix: Image|endswith: - :\Program Files (x86)\Citrix\HDX\bin\cmstart.exe - :\Program Files (x86)\Citrix\HDX\bin\icast.exe - :\Program Files (x86)\Citrix\System32\icast.exe - :\Program Files\Citrix\HDX\bin\cmstart.exe - :\Program Files\Citrix\HDX\bin\icast.exe - :\Program Files\Citrix\System32\icast.exe filter_optional_image_null: Image: null condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate logon scripts or custom shells may trigger false positives. Apply additional filters accordingly. level: high