Query: detection rule: Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folde
Matching passage: Sigma rule: Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folde. Logsource: windows / registry_set. Rule: title: Suspicious Application Allowed Through Exploit Guard id: 42205c73-75c8-4a63-9db1-e3782e06fda0 status: test description: Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folder settings references: - https://www.microsoft.com/security/blog/2017/10/23/windows-defender-exploit-guard-reduce-the-attack-surface-against-next-generation-malware/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-08-05 modified: 2023-08-17 tags: - attack.defense-impairment - attack.t1685 logsource: category: registry_set product: windows detection: selection_key: TargetObject|contains: SOFTWARE\Microsoft\Windows Defender\Windows Defender Exploit Guard\Controlled Folder Access\AllowedApplications selection_paths: TargetObject|contains: - \Users\Public\ - \AppData\Local\Temp\ - \Desktop\ - \PerfLogs\ - \Windows\Temp\ condition: all of selection_* falsepositives: - Unlikely level: high
Near-miss passage: Sigma rule: Detects the tampering of Hypervisor-protected Code Integrity (HVCI) related registry values via command line tool reg.ex. Logsource: windows / process_creation. Rule: title: Hypervisor-protected Code Integrity (HVCI) Related Registry Tampering Via CommandLine id: 6225c53a-a96e-4235-b28f-8d7997cd96eb related: - id: 8b7273a4-ba5d-4d8a-b04f-11f2900d043a type: similar status: experimental description: 'Detects the tampering of Hypervisor-protected Code Integrity (HVCI) related registry values via command line tool reg.exe. HVCI uses virtualization-based security to protect code integrity by ensuring that only trusted code can run in kernel mode. Adversaries may tamper with HVCI to load malicious or unsigned drivers, which can be used to escalate privileges, maintain persistence, or evade security mechanisms. ' references: - https://www.sophos.com/en-us/blog/sharpening-the-knife-gold-blades-strategic-evolution - https://learn.microsoft.com/en-us/windows/security/hardware-security/enable-virtualization-based-protection-of-code-integrity author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2026-01-26 tags: - attack.defense-impairment - attack.t1685 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \powershell.exe - \pwsh.exe - \reg.exe - OriginalFileName: - PowerShell.EXE - pwsh.dll - reg.exe selection_cli: CommandLine|contains: - 'add ' - 'New-ItemProperty ' - 'Set-ItemProperty ' - 'si ' selection_cli_base: CommandLine|contains: \DeviceGuard selection_cli_key: CommandLine|contains: - EnableVirtualizationBasedSecurity - HypervisorEnforcedCodeIntegrity condition: all of selection_* falsepositives: - Legitimate system administration tasks that require disabling HVCI for troubleshooting purposes when certain drivers or applications are incompatible with it. level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_hvci_registry_tampering/info.yml simulation: - type: atomic-red-team name: Disable Hypervisor-Enforced Code Integrity (HVCI) technique: T1562.001 atomic_guid: 70bd71e6-eba4-4e00-92f7-617911dbe020