mirror of
https://github.com/JKornev/hidden
synced 2024-06-28 18:02:15 +00:00
543 lines
15 KiB
C
543 lines
15 KiB
C
#include "PsMonitor.h"
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#include "ExcludeList.h"
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#include "Helper.h"
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#include "PsTable.h"
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#include "PsRules.h"
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#define PROCESS_QUERY_LIMITED_INFORMATION 0x1000
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#define SYSTEM_PROCESS_ID (HANDLE)4
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PVOID g_obRegCallback = NULL;
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OB_OPERATION_REGISTRATION g_regOperation[2];
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OB_CALLBACK_REGISTRATION g_regCallback;
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PsRulesContext g_excludeProcessRules;
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PsRulesContext g_protectProcessRules;
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// Use this variable for hard code full path to applications that can see hidden objects
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// For instance: L"\\Device\\HarddiskVolume1\\Windows\\System32\\calc.exe",
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// Notice: this array should be NULL terminated
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CONST PWCHAR g_excludeProcesses[] = {
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NULL
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};
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// Use this variable for hard code full path to applications that will be protected
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// For instance: L"\\Device\\HarddiskVolume1\\Windows\\System32\\cmd.exe",
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// Notice: this array should be NULL terminated
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CONST PWCHAR g_protectProcesses[] = {
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NULL
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};
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OB_PREOP_CALLBACK_STATUS ProcessPreCallback(PVOID RegistrationContext, POB_PRE_OPERATION_INFORMATION OperationInformation)
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{
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UNREFERENCED_PARAMETER(RegistrationContext);
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if (OperationInformation->KernelHandle)
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return OB_PREOP_SUCCESS;
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if (!IsProcessProtected(PsGetProcessId(OperationInformation->Object)))
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return OB_PREOP_SUCCESS;
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! Process: %d(%d:%d), Oper: %s, Space: %s\n",
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PsGetProcessId(OperationInformation->Object), PsGetCurrentProcessId(), PsGetCurrentThreadId(),
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(OperationInformation->Operation == OB_OPERATION_HANDLE_CREATE ? "create" : "dup"),
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(OperationInformation->KernelHandle ? "kernel" : "user")
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);
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if (IsProcessProtected(PsGetCurrentProcessId()))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! allow protected process %d\n", PsGetCurrentProcessId());
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return OB_PREOP_SUCCESS;
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}
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! disallow protected process %d\n", PsGetCurrentProcessId());
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if (OperationInformation->Operation == OB_OPERATION_HANDLE_CREATE)
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OperationInformation->Parameters->CreateHandleInformation.DesiredAccess = (SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION);
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else
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OperationInformation->Parameters->DuplicateHandleInformation.DesiredAccess = (SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION);
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return OB_PREOP_SUCCESS;
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}
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OB_PREOP_CALLBACK_STATUS ThreadPreCallback(PVOID RegistrationContext, POB_PRE_OPERATION_INFORMATION OperationInformation)
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{
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UNREFERENCED_PARAMETER(RegistrationContext);
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if (OperationInformation->KernelHandle)
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return OB_PREOP_SUCCESS;
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if (!IsProcessProtected(PsGetProcessId(OperationInformation->Object)))
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return OB_PREOP_SUCCESS;
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DbgPrint("FsFilter1!" __FUNCTION__ ": Thread: %d(%d:%d), Oper: %s, Space: %s\n",
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PsGetThreadId(OperationInformation->Object), PsGetCurrentProcessId(), PsGetCurrentThreadId(),
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(OperationInformation->Operation == OB_OPERATION_HANDLE_CREATE ? "create" : "dup"),
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(OperationInformation->KernelHandle ? "kernel" : "user")
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);
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if (IsProcessProtected(PsGetCurrentProcessId()))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! allow protected thread %d\n", PsGetCurrentProcessId());
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return OB_PREOP_SUCCESS;
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}
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! disallow protected thread %d\n", PsGetCurrentProcessId());
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if (OperationInformation->Operation == OB_OPERATION_HANDLE_CREATE)
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OperationInformation->Parameters->CreateHandleInformation.DesiredAccess = (SYNCHRONIZE | THREAD_QUERY_LIMITED_INFORMATION);
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else
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OperationInformation->Parameters->DuplicateHandleInformation.DesiredAccess = (SYNCHRONIZE | THREAD_QUERY_LIMITED_INFORMATION);
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return OB_PREOP_SUCCESS;
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}
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VOID CheckProcessFlags(PProcessTableEntry Entry, PCUNICODE_STRING ImgPath, HANDLE ParentId)
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{
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ProcessTableEntry lookup;
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ULONG inheritType;
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RtlZeroMemory(&lookup, sizeof(lookup));
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// Check exclude flag
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Entry->excluded = FALSE;
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Entry->inheritExclusion = PsRuleTypeWithoutInherit;
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if (FindInheritanceInPsRuleList(g_excludeProcessRules, ImgPath, &inheritType))
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{
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Entry->excluded = TRUE;
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Entry->inheritExclusion = inheritType;
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}
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else if (ParentId != 0)
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{
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lookup.processId = ParentId;
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if (GetProcessInProcessTable(&lookup))
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{
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if (lookup.inheritExclusion == PsRuleTypeInherit)
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{
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Entry->excluded = TRUE;
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Entry->inheritExclusion = PsRuleTypeInherit;
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}
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else if (lookup.inheritExclusion == PsRuleTypeInheritOnce)
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{
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Entry->excluded = TRUE;
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Entry->inheritExclusion = PsRuleTypeWithoutInherit;
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}
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}
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}
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// Check protected flag
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Entry->protected = FALSE;
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Entry->inheritProtection = PsRuleTypeWithoutInherit;
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if (FindInheritanceInPsRuleList(g_protectProcessRules, ImgPath, &inheritType))
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{
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Entry->protected = TRUE;
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Entry->inheritProtection = inheritType;
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}
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else if (ParentId != 0)
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{
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lookup.processId = ParentId;
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if (GetProcessInProcessTable(&lookup))
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{
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if (lookup.inheritProtection == PsRuleTypeInherit)
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{
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Entry->protected = TRUE;
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Entry->inheritProtection = PsRuleTypeInherit;
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}
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else if (lookup.inheritProtection == PsRuleTypeInheritOnce)
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{
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Entry->protected = TRUE;
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Entry->inheritProtection = PsRuleTypeWithoutInherit;
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}
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}
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}
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}
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VOID CreateProcessNotifyCallback(PEPROCESS Process, HANDLE ProcessId, PPS_CREATE_NOTIFY_INFO CreateInfo)
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{
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ProcessTableEntry entry;
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UNREFERENCED_PARAMETER(Process);
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if (CreateInfo)
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! new process: %d (%d:%d), %wZ\n", ProcessId, PsGetCurrentProcessId(), PsGetCurrentThreadId(), CreateInfo->ImageFileName);
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else
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DbgPrint("FsFilter1!" __FUNCTION__ ": !!!!! destroy process: %d (%d:%d)\n", ProcessId, PsGetCurrentProcessId(), PsGetCurrentThreadId());
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RtlZeroMemory(&entry, sizeof(entry));
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entry.processId = ProcessId;
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if (CreateInfo)
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{
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const USHORT maxBufSize = CreateInfo->ImageFileName->Length + NORMALIZE_INCREAMENT;
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UNICODE_STRING normalized;
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NTSTATUS status;
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normalized.Buffer = (PWCH)ExAllocatePool(PagedPool, maxBufSize);
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normalized.Length = 0;
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normalized.MaximumLength = maxBufSize;
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if (!normalized.Buffer)
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": error, can't allocate buffer\n");
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return;
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}
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status = NormalizeDevicePath(CreateInfo->ImageFileName, &normalized);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": path normalization failed with code:%08x, path:%wZ\n", status, CreateInfo->ImageFileName);
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ExFreePool(normalized.Buffer);
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return;
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}
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CheckProcessFlags(&entry, &normalized, CreateInfo->ParentProcessId);
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if (entry.excluded)
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DbgPrint("FsFilter1!" __FUNCTION__ ": excluded process:%d\n", ProcessId);
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if (entry.protected)
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DbgPrint("FsFilter1!" __FUNCTION__ ": protected process:%d\n", ProcessId);
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if (!AddProcessToProcessTable(&entry))
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DbgPrint("FsFilter1!" __FUNCTION__ ": can't add process(pid:%d) to process table\n", ProcessId);
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ExFreePool(normalized.Buffer);
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}
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else
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{
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if (!RemoveProcessFromProcessTable(&entry))
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DbgPrint("FsFilter1!" __FUNCTION__ ": can't remove process(pid:%d) from process table\n", ProcessId);
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}
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}
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BOOLEAN IsProcessExcluded(HANDLE ProcessId)
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{
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return FALSE;
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return entry.excluded;
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}
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BOOLEAN IsProcessProtected(HANDLE ProcessId)
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{
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return FALSE;
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return entry.protected;
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}
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NTSTATUS InitializePsMonitor(PDRIVER_OBJECT DriverObject)
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{
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const USHORT maxBufSize = 512;
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NTSTATUS status;
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UNICODE_STRING str, normalized;
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UINT32 i;
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PsRuleEntryId ruleId;
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UNREFERENCED_PARAMETER(DriverObject);
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normalized.Buffer = (PWCH)ExAllocatePool(NonPagedPool, maxBufSize);
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normalized.Length = 0;
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normalized.MaximumLength = maxBufSize;
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if (!normalized.Buffer)
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": allocation failed\n");
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return STATUS_ACCESS_DENIED;
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}
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// Initialize and fill exclude file\dir lists
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// exclude
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status = InitializePsRuleListContext(&g_excludeProcessRules);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": exclude process rules initialization failed with code:%08x\n", status);
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ExFreePool(normalized.Buffer);
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return status;
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}
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for (i = 0; g_excludeProcesses[i]; i++)
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{
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RtlInitUnicodeString(&str, g_excludeProcesses[i]);
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status = NormalizeDevicePath(&str, &normalized);
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DbgPrint("FsFilter1!" __FUNCTION__ ": normalized exclude %wZ\n", &normalized);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": path normalization failed with code:%08x, path:%wZ\n", status, &str);
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continue;
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}
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AddRuleToPsRuleList(g_excludeProcessRules, &normalized, PsRuleTypeWithoutInherit, &ruleId);
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}
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// protected
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status = InitializePsRuleListContext(&g_protectProcessRules);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": exclude process rules initialization failed with code:%08x\n", status);
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DestroyPsRuleListContext(g_excludeProcessRules);
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ExFreePool(normalized.Buffer);
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return status;
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}
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for (i = 0; g_protectProcesses[i]; i++)
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{
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RtlInitUnicodeString(&str, g_protectProcesses[i]);
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status = NormalizeDevicePath(&str, &normalized);
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DbgPrint("FsFilter1!" __FUNCTION__ ": normalized exclude %wZ\n", &normalized);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": path normalization failed with code:%08x, path:%wZ\n", status, &str);
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continue;
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}
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AddRuleToPsRuleList(g_protectProcessRules, &normalized, PsRuleTypeWithoutInherit, &ruleId);
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}
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status = InitializeProcessTable(CheckProcessFlags);
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if (!NT_SUCCESS(status))
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{
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DestroyPsRuleListContext(g_excludeProcessRules);
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DestroyPsRuleListContext(g_protectProcessRules);
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ExFreePool(normalized.Buffer);
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return status;
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}
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ExFreePool(normalized.Buffer);
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// Register ps\thr pre create\duplicate object callback
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g_regOperation[0].ObjectType = PsProcessType;
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g_regOperation[0].Operations = OB_OPERATION_HANDLE_CREATE | OB_OPERATION_HANDLE_DUPLICATE;
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g_regOperation[0].PreOperation = ProcessPreCallback;
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g_regOperation[0].PostOperation = NULL;
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g_regOperation[1].ObjectType = PsThreadType;
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g_regOperation[1].Operations = OB_OPERATION_HANDLE_CREATE | OB_OPERATION_HANDLE_DUPLICATE;
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g_regOperation[1].PreOperation = ThreadPreCallback;
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g_regOperation[1].PostOperation = NULL;
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g_regCallback.Version = OB_FLT_REGISTRATION_VERSION;
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g_regCallback.OperationRegistrationCount = 2;
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g_regCallback.RegistrationContext = NULL;
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g_regCallback.OperationRegistration = g_regOperation;
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RtlInitUnicodeString(&g_regCallback.Altitude, L"1000");
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status = ObRegisterCallbacks(&g_regCallback, &g_obRegCallback);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": Object filter registration failed with code:%08x\n", status);
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DestroyPsMonitor();
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return status;
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}
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// Register rocess create\destroy callback
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status = PsSetCreateProcessNotifyRoutineEx(CreateProcessNotifyCallback, FALSE);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": process notify registartion failed with code:%08x\n", status);
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DestroyPsMonitor();
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return status;
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}
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return status;
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}
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NTSTATUS DestroyPsMonitor()
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{
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if (g_obRegCallback)
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{
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ObUnRegisterCallbacks(g_obRegCallback);
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g_obRegCallback = NULL;
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}
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PsSetCreateProcessNotifyRoutineEx(CreateProcessNotifyCallback, TRUE);
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DestroyPsRuleListContext(g_excludeProcessRules);
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DestroyPsRuleListContext(g_protectProcessRules);
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DestroyProcessTable();
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return STATUS_SUCCESS;
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}
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NTSTATUS AddProtectedImage(PUNICODE_STRING ImagePath, ULONG InheritType, PULONGLONG ObjId)
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{
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const USHORT maxBufSize = ImagePath->Length + NORMALIZE_INCREAMENT;
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UNICODE_STRING normalized;
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NTSTATUS status;
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normalized.Buffer = (PWCH)ExAllocatePool(PagedPool, maxBufSize);
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normalized.Length = 0;
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normalized.MaximumLength = maxBufSize;
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if (!normalized.Buffer)
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": error, can't allocate buffer\n");
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return STATUS_MEMORY_NOT_ALLOCATED;
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}
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status = NormalizeDevicePath(ImagePath, &normalized);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": path normalization failed with code:%08x, path:%wZ\n", status, ImagePath);
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ExFreePool(normalized.Buffer);
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return status;
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}
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DbgPrint("FsFilter1!" __FUNCTION__ ": protect image: %wZ\n", &normalized);
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status = AddRuleToPsRuleList(g_protectProcessRules, &normalized, InheritType, ObjId);
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ExFreePool(normalized.Buffer);
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return status;
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//DbgPrint("FsFilter1!" __FUNCTION__ ": protect image: %wZ\n", ImagePath);
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//return AddRuleToPsRuleList(g_protectProcessRules, ImagePath, InheritType, ObjId);
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}
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NTSTATUS GetProtectedProcessState(HANDLE ProcessId, PULONG InheritType, PBOOLEAN Enable)
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{
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return STATUS_NOT_FOUND;
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*Enable = entry.protected;
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*InheritType = entry.inheritProtection;
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return STATUS_SUCCESS;
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}
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NTSTATUS SetProtectedProcessState(HANDLE ProcessId, ULONG InheritType, BOOLEAN Enable)
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{
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NTSTATUS status = STATUS_SUCCESS;
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return STATUS_NOT_FOUND;
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if (Enable)
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{
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entry.protected = TRUE;
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entry.inheritProtection = InheritType;
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}
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else
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{
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entry.protected = FALSE;
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}
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if (!UpdateProcessInProcessTable(&entry))
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return STATUS_NOT_FOUND;
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return status;
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}
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NTSTATUS RemoveProtectedImage(ULONGLONG ObjId)
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{
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return RemoveRuleFromPsRuleList(g_protectProcessRules, ObjId);
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}
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NTSTATUS RemoveAllProtectedImages()
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{
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return RemoveAllRulesFromPsRuleList(g_protectProcessRules);
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}
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NTSTATUS AddExcludedImage(PUNICODE_STRING ImagePath, ULONG InheritType, PULONGLONG ObjId)
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{
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const USHORT maxBufSize = ImagePath->Length + NORMALIZE_INCREAMENT;
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UNICODE_STRING normalized;
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NTSTATUS status;
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normalized.Buffer = (PWCH)ExAllocatePool(PagedPool, maxBufSize);
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normalized.Length = 0;
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normalized.MaximumLength = maxBufSize;
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if (!normalized.Buffer)
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": error, can't allocate buffer\n");
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return STATUS_MEMORY_NOT_ALLOCATED;
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}
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status = NormalizeDevicePath(ImagePath, &normalized);
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if (!NT_SUCCESS(status))
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{
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DbgPrint("FsFilter1!" __FUNCTION__ ": path normalization failed with code:%08x, path:%wZ\n", status, ImagePath);
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ExFreePool(normalized.Buffer);
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return status;
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}
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DbgPrint("FsFilter1!" __FUNCTION__ ": exclude image: %wZ\n", &normalized);
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status = AddRuleToPsRuleList(g_excludeProcessRules, &normalized, InheritType, ObjId);
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ExFreePool(normalized.Buffer);
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return status;
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}
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NTSTATUS GetExcludedProcessState(HANDLE ProcessId, PULONG InheritType, PBOOLEAN Enable)
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{
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return STATUS_NOT_FOUND;
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*Enable = entry.excluded;
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*InheritType = entry.inheritExclusion;
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return STATUS_SUCCESS;
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}
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NTSTATUS SetExcludedProcessState(HANDLE ProcessId, ULONG InheritType, BOOLEAN Enable)
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{
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NTSTATUS status = STATUS_SUCCESS;
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ProcessTableEntry entry;
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entry.processId = ProcessId;
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if (!GetProcessInProcessTable(&entry))
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return STATUS_NOT_FOUND;
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if (Enable)
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{
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entry.excluded = TRUE;
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entry.inheritExclusion = InheritType;
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}
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else
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{
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entry.excluded = FALSE;
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}
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if (!UpdateProcessInProcessTable(&entry))
|
|
return STATUS_NOT_FOUND;
|
|
|
|
return status;
|
|
}
|
|
|
|
NTSTATUS RemoveExcludedImage(ULONGLONG ObjId)
|
|
{
|
|
return RemoveRuleFromPsRuleList(g_excludeProcessRules, ObjId);
|
|
}
|
|
|
|
NTSTATUS RemoveAllExcludedImages()
|
|
{
|
|
return RemoveAllRulesFromPsRuleList(g_excludeProcessRules);
|
|
}
|