Query: detection rule: Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to overri
Matching passage: Sigma rule: Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to overri. Logsource: windows / process_creation. Rule: title: Allow Service Access Using Security Descriptor Tampering Via Sc.EXE id: 6c8fbee5-dee8-49bc-851d-c3142d02aa47 related: - id: a537cfc3-4297-4789-92b5-345bfd845ad0 type: similar status: test description: Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to override access restrictions set by previous ACLs. references: - https://twitter.com/0gtweet/status/1628720819537936386 - https://itconnect.uw.edu/tools-services-support/it-systems-infrastructure/msinf/other-help/understanding-sddl-syntax/ - https://learn.microsoft.com/en-us/windows/win32/secauthz/sid-strings author: Nasreddine Bencherchali (Nextron Systems) date: 2023-02-28 modified: 2025-10-22 tags: - attack.privilege-escalation - attack.persistence - attack.t1543.003 logsource: category: process_creation product: windows detection: selection_sc: - Image|endswith: \sc.exe - OriginalFileName: sc.exe selection_sdset: CommandLine|contains|all: - sdset - A; selection_trustee: CommandLine|contains: - ;IU - ;SU - ;BA - ;SY - ;WD filter_optional_hexnode: ParentImage: C:\Hexnode\Hexnode Agent\Current\HexnodeAgent.exe condition: all of selection_* and not 1 of filter_optional_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by application. Logsource: windows / file_event. Rule: title: New Custom Shim Database Created id: ee63c85c-6d51-4d12-ad09-04e25877a947 status: test description: 'Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by application shims. The Microsoft Windows Application Compatibility Infrastructure/Framework (Application Shim) was created to allow for backward compatibility of software as the operating system codebase changes over time. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.011/T1546.011.md#atomic-test-2---new-shim-database-files-created-in-the-default-shim-database-directory - https://www.mandiant.com/resources/blog/fin7-shim-databases-persistence - https://liberty-shell.com/sec/2020/02/25/shim-persistence/ - https://andreafortuna.org/2018/11/12/process-injection-and-persistence-using-application-shimming/ author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2021-12-29 modified: 2023-12-06 tags: - attack.privilege-escalation - attack.persistence - attack.t1547.009 logsource: product: windows category: file_event detection: selection: TargetFilename|contains: - :\Windows\apppatch\Custom\ - :\Windows\apppatch\CustomSDB\ condition: selection falsepositives: - Legitimate custom SHIM installations will also trigger this rule level: medium regression_tests_path: regression_data/rules/windows/file/file_event/file_event_win_creation_new_shim_database/info.yml