Query: alert when Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence via autorun.
Matching 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
Near-miss passage: Sigma rule: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID. Logsource: windows / process_creation. Rule: title: LSASS Process Reconnaissance Via Findstr.EXE id: fe63010f-8823-4864-a96b-a7b4a0f7b929 status: test description: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID references: - https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1 author: Florian Roth (Nextron Systems) date: 2022-08-12 modified: 2024-06-04 tags: - attack.credential-access - attack.t1552.006 logsource: category: process_creation product: windows detection: selection_findstr_img: - Image|endswith: - \find.exe - \findstr.exe - OriginalFileName: - FIND.EXE - FINDSTR.EXE selection_findstr_cli: CommandLine|contains: lsass selection_special: CommandLine|contains|windash: - ' /i "lsass' - ' /i lsass.exe' - findstr "lsass - findstr lsass - findstr.exe "lsass - findstr.exe lsass condition: all of selection_findstr_* or selection_special falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_findstr_lsass/info.yml