PoCs for Kernelmode rootkit techniques research. Contribute to daem0nc0re/VectorKernel development by creating an account on GitHub.

[English]Ende Juni 2025 gab es Meldungen (habe ich jedenfalls so interpretiert), dass Virenscanner in „Bälde“ nicht mehr den Kernelmode von Windows verwenden dürfen. Der CrowdStrike-Fall…

PoCs for Kernelmode rootkit techniques research. Contribute to daem0nc0re/VectorKernel development by creating an account on GitHub.

PoCs for Kernelmode rootkit techniques research. Contribute to daem0nc0re/VectorKernel development by creating an account on GitHub.

Security researchers have discovered vulnerabilities in Windows 11's core security features that could allow attackers to bypass multiple protection mechanisms and achieve arbitrary code execution at ...

The `GetProcessHandleFromHwnd` API in Windows was analyzed after being exploited in a publicly disclosed UAC bypass via Quick Assist, initially documented as requiring UIAccess privileges but later found to allow cross-user process access. The API evolved from a user-mode hook-based implementation in Windows Vista to a kernel-mode function (`NtUserGetWindowProcessHandle`) in Windows 10 1803, which bypassed access checks for protected and sandboxed processes by opening handles in `KernelMode`. A security flaw (CVE-2023-41772), reported by researcher Sascha Mayer, enabled privilege escalation by exploiting the UI Access flag to open arbitrary processes, later patched in Windows 11 23H2 by enforcing `UserMode` access checks. Windows 11 24H2 introduced further hardening, including mandatory UIPI enforcement and a new `ResponsiblePid` feature flag restricting the API to UI Access-enabled processes. The analysis demonstrated exploitation techniques targeting `WerFaultSecure.exe` (a TCB-level protected process) to hijack handles with limited but sufficient access for code injection. The API’s documentation was also found to contain inaccuracies regarding integrity level and cross-user restrictions.