Query: alert when Detects changes to the "HVCIDisallowedImages" registry value to potentially add a driver to the list, in order to preven
Matching passage: Sigma rule: Detects changes to the "HVCIDisallowedImages" registry value to potentially add a driver to the list, in order to preven. Logsource: windows / registry_set. Rule: title: Driver Added To Disallowed Images In HVCI - Registry id: 555155a2-03bf-4fe7-af74-d176b3fdbe16 related: - id: 44cee399-f6b1-45cc-a87c-ea14c6064d6b type: similar status: test description: 'Detects changes to the "HVCIDisallowedImages" registry value to potentially add a driver to the list, in order to prevent it from loading. ' references: - https://github.com/yardenshafir/conference_talks/blob/3de1f5d7c02656c35117f067fbff0a219c304b09/OffensiveCon_2023_Your_Mitigations_are_My_Opportunities.pdf - https://x.com/yarden_shafir/status/1822667605175324787 author: Nasreddine Bencherchali (Nextron Systems), Omar Khaled (@beacon_exe) date: 2023-12-05 modified: 2024-08-21 tags: - attack.stealth logsource: category: registry_set product: windows detection: selection: TargetObject|contains|all: - \Control\CI\ - \HVCIDisallowedImages condition: selection falsepositives: - Legitimate usage of this key would also trigger this. Investigate the driver being added and make sure its intended level: high
Near-miss passage: Sigma rule: Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence via autorun.. Logsource: windows / registry_set. Rule: title: Persistence Via Disk Cleanup Handler - Autorun id: d4e2745c-f0c6-4bde-a3ab-b553b3f693cc status: test description: 'Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence via autorun. The disk cleanup manager is part of the operating system. It displays the dialog box […] The user has the option of enabling or disabling individual handlers by selecting or clearing their check box in the disk cleanup manager''s UI. Although Windows comes with a number of disk cleanup handlers, they aren''t designed to handle files produced by other applications. Instead, the disk cleanup manager is designed to be flexible and extensible by enabling any developer to implement and register their own disk cleanup handler. Any developer can extend the available disk cleanup services by implementing and registering a disk cleanup handler. ' references: - https://persistence-info.github.io/Data/diskcleanuphandler.html - https://www.hexacorn.com/blog/2018/09/02/beyond-good-ol-run-key-part-86/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-07-21 modified: 2023-08-17 tags: - attack.persistence logsource: category: registry_set product: windows detection: root: TargetObject|contains: \SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\ selection_autorun: TargetObject|contains: \Autorun Details: DWORD (0x00000001) selection_pre_after: TargetObject|contains: - \CleanupString - \PreCleanupString Details|contains: - cmd - powershell - rundll32 - mshta - cscript - wscript - wsl - \Users\Public\ - \Windows\TEMP\ - \Microsoft\Windows\Start Menu\Programs\Startup\ condition: root and 1 of selection_* falsepositives: - Unknown level: medium