Kshared Bypass May 2026

Because step 1 may require a syscall (e.g., NtQuerySystemInformation ), many “pure” bypasses fail. However, advanced implementations use the PsActiveProcessHead exported via KdDebuggerDataBlock to walk the process list and retrieve the DirectoryTableBase (CR3) from the EPROCESS structure — all via physical reads.

Thus, the reads the entire system’s physical memory without any syscalls after the initial mapping. 4. Impact on Security Tools | Tool Type | Evasion Effectiveness | |-----------|----------------------| | Userland Hooks (EDR) | Full bypass – no userland API called. | | Syscall Monitoring (e.g., Sysmon Event ID 10) | Bypass – no syscall to NtReadVirtualMemory . | | Kernel Callbacks ( ObRegisterCallbacks ) | Partial bypass – physical reads don’t trigger object handle checks. | | PatchGuard (on x64) | Triggers if kernel code is modified, but read-only bypass is safe. | kshared bypass

// 3. Map the physical page containing remoteAddr (requires kernel RW) // This is the actual bypass – no NtReadVirtualMemory used. Because step 1 may require a syscall (e