Query: Sigma rule for Detects potential PowerShell execution from a DLL instead of the usual PowerShell process as seen used in PowerShdll. Th
Matching passage: Sigma rule: Detects potential PowerShell execution from a DLL instead of the usual PowerShell process as seen used in PowerShdll. Th. Logsource: windows / process_creation. Rule: title: Potential PowerShell Execution Via DLL id: 6812a10b-60ea-420c-832f-dfcc33b646ba status: test description: 'Detects potential PowerShell execution from a DLL instead of the usual PowerShell process as seen used in PowerShdll. This detection assumes that PowerShell commands are passed via the CommandLine. ' references: - https://github.com/p3nt4/PowerShdll/blob/62cfa172fb4e1f7f4ac00ca942685baeb88ff356/README.md author: Markus Neis, Nasreddine Bencherchali (Nextron Systems) date: 2018-08-25 modified: 2024-03-07 tags: - attack.stealth - attack.t1218.011 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \InstallUtil.exe - \RegAsm.exe - \RegSvcs.exe - \regsvr32.exe - \rundll32.exe - OriginalFileName: - InstallUtil.exe - RegAsm.exe - RegSvcs.exe - REGSVR32.EXE - RUNDLL32.EXE selection_cli: CommandLine|contains: - Default.GetString - DownloadString - FromBase64String - 'ICM ' - 'IEX ' - Invoke-Command - Invoke-Expression condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects when the Windows Vulnerable Driver Blocklist is set to disabled. This setting is crucial for preventing the load. Logsource: windows / registry_set. Rule: title: Windows Vulnerable Driver Blocklist Disabled id: d526c60a-e236-4011-b165-831ffa52ab70 related: - id: 22154f0e-5132-4a54-aa78-cc62f6def531 type: similar status: experimental description: 'Detects when the Windows Vulnerable Driver Blocklist is set to disabled. This setting is crucial for preventing the loading of known vulnerable drivers, and its modification may indicate an attempt to bypass security controls. It is often targeted by threat actors to facilitate the installation of malicious or vulnerable drivers, particularly in scenarios involving Endpoint Detection and Response (EDR) bypass techniques. This rule applies to systems that support the Vulnerable Driver Blocklist feature, including Windows 10 version 1903 and later, and Windows Server 2022 and later. Note that this change will require a reboot to take effect, and this rule only detects the registry modification action. ' references: - https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules - https://www.sophos.com/en-us/blog/sharpening-the-knife-gold-blades-strategic-evolution - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/design/microsoft-recommended-driver-block-rules author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2026-01-26 tags: - attack.defense-impairment - attack.t1685 logsource: category: registry_set product: windows detection: selection: TargetObject|endswith: \Control\CI\Config\VulnerableDriverBlocklistEnable Details: DWORD (0x00000000) condition: selection falsepositives: - Unlikely and should be investigated immediately. level: high regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_vulnerable_driver_blocklist_disable/info.yml