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我想读notepad.exe的PEB 目前我试图通过注册ProcessCreation回调来访问PEB，然后等到创建notepad.exe。当创建记事本时，我使用它的PID打开进程并使用ZwQuerryProcess（PROCESS_BASIC_INFORMATION）查找PEB。如何访问用户模式内存？
但是当我尝试读取超出信息 - > PEB抛出一个例外（我想这是因为我不能访问内存）
当我第一次发现这一点我记得有人提KeStackAttachProcess和它的相对于访问另一个进程上下文中的地址。
问题是我不知道如何检查上下文更改是否成功。一旦我被认为是在另一个环境中，我仍然无法访问peb。有谁知道我可以如何访问记事本的PEB？
这里是我目前使用查找和访问PEB代码：
假设hgtPid =记事本的PID
void ModuleDumperThread(){
NTSTATUS Status = STATUS_SUCCESS;
HANDLE hProcessHandle = NULL;
PLIST_ENTRY Next;
PLDR_DATA_TABLE_ENTRY LdrDataTableEntry;
CLIENT_ID clientID;
ACCESS_MASK DesiredAccess = PROCESS_ALL_ACCESS;
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE hProcessId = hgtPid;
PROCESS_BASIC_INFORMATION BasicInfoReal;
ULONG SizeReturned;
PEPROCESS ep;
KAPC_STATE *ka_state = NULL;
InitializeObjectAttributes (&ObjectAttributes, NULL, OBJ_KERNEL_HANDLE, NULL, NULL);
clientID.UniqueProcess = hProcessId;
clientID.UniqueThread = NULL;
__try{
Status = ZwOpenProcess(&hProcessHandle, DesiredAccess, &ObjectAttributes, &clientID);
if(Status != STATUS_SUCCESS){
DbgPrint("Failed to open process\n");
DbgPrint("NtStatus: 0x%x", Status);
return;
}
Status = gZwQueryprocess(hProcessHandle, ProcessBasicInformation, (PVOID)&BasicInfoReal, sizeof(PROCESS_BASIC_INFORMATION), &SizeReturned);
if(Status != STATUS_SUCCESS){
DbgPrint("gZwQueryprocess failed\n");
DbgPrint("Size returned: 0x%x\nNtStatus: 0x%x\n", SizeReturned, Status);
ZwClose(hProcessHandle);
return;
}
ZwClose(hProcessHandle);
Status = PsLookupProcessByProcessId(hProcessId, &ep);
if(Status != STATUS_SUCCESS){
DbgPrint("PsLookupProcessByProcessId failed\n");
DbgPrint("NtStatus: 0x%x\n", Status);
return;
}
ka_state = ExAllocatePoolWithTag(NonPagedPool, sizeof(KAPC_STATE),'trak');
KeStackAttachProcess(ep, ka_state);
__try{
if(BasicInfoReal.PebBaseAddress->Ldr){
Next = BasicInfoReal.PebBaseAddress->Ldr->InLoadOrderModuleList.Blink;
LdrDataTableEntry = CONTAINING_RECORD(Next,
LDR_DATA_TABLE_ENTRY,
LoadOrder
);
DbgPrint("Module base address: 0x%x", LdrDataTableEntry->ModuleBaseAddress);
}
}__except(EXCEPTION_EXECUTE_HANDLER) {
DbgPrint("Exception while trying to access the PEB\n");
}
KeUnstackDetachProcess(ka_state);
ExFreePool(ka_state);
}__except(EXCEPTION_EXECUTE_HANDLER) {
DbgPrint("Exception in ModuleDumper\n");
}
if(ep){
ObDereferenceObject(ep);
}
return;
}
有谁发现任何错误/故障？
在此先感谢
编辑：
我已经改变了一些东西，而这正是它变得非常怪异。为了确保我将KeStackAttachProcess（）的'ep'更改为msdn指定的PRKPROCESS类型，当我调用KeStackAttachProcess（）时，现在执行就会消失。在通话之前，一切都很顺利，通话结束后，什么都没有。没有错误没有例外没有BSOD的：没有。 发生了什么？！？
变化：
__asm{
mov eax, ep
mov eax, [eax]
mov myPKPROCESS, eax // just dereferencing my pointer (I don't have the structs)
}
DbgPrint("Test print\n"); // gets printed just fine
KeStackAttachProcess(&myPKPROCESS, ka_state);
DbgPrint("Test print\n"); // nothing happens
EDIT2：
我已经解决了这个问题。我仍然不知道哪里出了问题在上面的代码，但是这个代码似乎工作：
void ModuleDumperThread(){
NTSTATUS Status = STATUS_SUCCESS;
HANDLE hProcessHandle = NULL;
PLIST_ENTRY Next;
PLDR_DATA_TABLE_ENTRY LdrDataTableEntry;
CLIENT_ID clientID;
ACCESS_MASK DesiredAccess = PROCESS_ALL_ACCESS;
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE hProcessId = hgtPid;
PROCESS_BASIC_INFORMATION BasicInfoReal;
ULONG SizeReturned;
PEPROCESS ep = NULL;
unsigned int Index = 0;
InitializeObjectAttributes (&ObjectAttributes, NULL, OBJ_KERNEL_HANDLE, NULL, NULL);
clientID.UniqueProcess = hProcessId;
clientID.UniqueThread = NULL;
__try{
Status = ZwOpenProcess(&hProcessHandle, DesiredAccess, &ObjectAttributes, &clientID);
if(Status != STATUS_SUCCESS){
DbgPrint("Failed to open process\n");
DbgPrint("NtStatus: 0x%x", Status);
return;
}
Status = gZwQueryprocess(hProcessHandle, ProcessBasicInformation, (PVOID)&BasicInfoReal, sizeof(PROCESS_BASIC_INFORMATION), &SizeReturned);
if(Status != STATUS_SUCCESS){
DbgPrint("gZwQueryprocess failed\n");
DbgPrint("Size returned: 0x%x\nNtStatus: 0x%x\n", SizeReturned, Status);
ZwClose(hProcessHandle);
return;
}
//DbgPrint("Basic info: 0x%x\n", BasicInfoReal);
//DbgPrint("BasicInfoReal->PebBaseAddress: 0x%x\n", BasicInfoReal->PebBaseAddress);
//DbgPrint("RealPeb: 0x%x\n", RealPeb);
//DbgPrint("gZwReadVirtualMemory: 0x%x\n", gZwReadVirtualMemory);
Status = PsLookupProcessByProcessId(hProcessId, &ep);
if(Status != STATUS_SUCCESS){
DbgPrint("PsLookupProcessByProcessId failed\n");
DbgPrint("NtStatus: 0x%x\n", Status);
ZwClose(hProcessHandle);
return;
}
Timeout((INT64)0x1FFFFFF);
KeAttachProcess(ep);
__try{
DbgPrint("ImageBaseAddress of notepad.exe: 0x%x\n", BasicInfoReal.PebBaseAddress->ImageBaseAddress);
Next = BasicInfoReal.PebBaseAddress->Ldr->InLoadOrderModuleList.Blink;
LdrDataTableEntry = CONTAINING_RECORD(Next, LDR_DATA_TABLE_ENTRY, LoadOrder);
for(Index = 0; Index != 17; Index++){
DbgPrint("%d: ImageBase of %wZ in Notepad.exe: 0x%x\n", Index, &(LdrDataTableEntry->ModuleName), LdrDataTableEntry->ModuleBaseAddress);
Next = Next->Blink;
LdrDataTableEntry = CONTAINING_RECORD(Next, LDR_DATA_TABLE_ENTRY, LoadOrder);
}
}__except(EXCEPTION_EXECUTE_HANDLER) {
DbgPrint("Exception while accessing the LDR\n");
}
KeDetachProcess();
}__except(EXCEPTION_EXECUTE_HANDLER) {
DbgPrint("Exception in ModuleDumper\n");
}
ObDereferenceObject((PVOID)ep);
ZwClose(hProcessHandle);
return;
}