作 者: Sysnap
时 间: 2008-05-30,19:16
链 接:
http://bbs.pediy.com/showthread.php?t=65731
// ***************************************************************
// Author: Sysnap
// Link: http://hi.baidu.com/sysnap
//
// ***************************************************************
好久没弄hook了.最近看到还是很多人弄,而且蓝屏,就把我以前的inline hook的code改下,于是有此文,呵呵,给跟我一样的菜鸟科普用的,高手飘过
现在一般工具的进程保护可能是hook NtOpenProcess和NtTerminateProcess...其实关于进程的话题很多,印象中Sudami同学对这方面面比较懂.下面的代码可以保护进程
WsysCheck--->>>failed
IceSword---->>>failed
Gmer-->>>failed
RUK--->>>failed
SnipeSword---->>>failde(不包括内存清0)
其实这只是简单的进程保护,唯一的好处就是hook导出函数ObReferenceObjectByHandle,稳定...而结束之的方法也有很多,比如内存清0..PspTerminateProcess...PspExitThread等等...其中很多很强大的办法很多anti-rootkit的工具没使用,我想可能就是为了稳定吧.的确
另外,你可以用这个code来屏蔽某些程序的运行...其实这个code的效果就是已经运行的保护其进程,没有运行的屏蔽其运行....代码写得很草/.对系统性能也有一定影响,自己根据需要再改下吧...
代码就是inline hook ObReferenceObjectByHandle使其跳到T_ObReferenceObjectByHandle中
__declspec(naked) T_ObReferenceObjectByHandle(
IN HANDLE Handle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_TYPE ObjectType OPTIONAL,
IN KPROCESSOR_MODE AccessMode,
OUT PVOID *Object,
OUT POBJECT_HANDLE_INFORMATION HandleInformation OPTIONAL
)
{
_asm
{
mov edi,edi------>>>执行被修改的前5个字节
push ebp
mov ebp,esp
push [ebp+0x1c]------>>>参数压栈
push [ebp+0x18]
push [ebp+0x14]
push [ebp+0x10]
push [ebp+0xc]
push [ebp+8]
call MyObReferenceObjectByHandle -------->>>>调用我们的功能函数
cmp eax,1
jz end
mov eax,ObReferenceObjectByHandle -------->>>>正常运行原来的函数
add eax,5
jmp eax
end:
mov [ebp+8],-1------>>>>如果不想让这个函数正常运行..无效句柄就可以
mov eax,ObReferenceObjectByHandle
add eax,5
jmp eax
}
对原来函数是否要让其正常运行的判断由MyObReferenceObjectByHandle完成
int MyObReferenceObjectByHandle(
IN HANDLE Handle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_TYPE ObjectType OPTIONAL,
IN KPROCESSOR_MODE AccessMode,
OUT PVOID *Object,
OUT POBJECT_HANDLE_INFORMATION HandleInformation OPTIONAL
)
{
PEPROCESS Process;
KIRQL oldIrql;
int JmpOffSet;
unsigned char Code[5]={0x8b,0xff,0x55,0x8b,0xec};
unsigned char JmpCode[5] = { 0xe9, 0x00, 0x00, 0x00, 0x00 };
if(*PsProcessType==ObjectType)//判断句柄所属对象类型是不是*PsProcessType
{
oldIrql = KeRaiseIrqlToDpcLevel();
__asm
{
CLI
MOV eax, CR0
AND eax, NOT 10000H
MOV CR0, eax
}
RtlCopyMemory ( ObReferenceObjectByHandle, Code, 5 );//恢复inline hook以便正确调用ObReferenceObjectByHandle
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
ObReferenceObjectByHandle(Handle,DesiredAccess,ObjectType,AccessMode,&Process,NULL);
if (_stricmp((char*)((char*)Process+0x174), ProtectName) == 0 )//判断是不是我们要保护的进程
{
JmpOffSet= (char*)T_ObReferenceObjectByHandle - (char*)ObReferenceObjectByHandle - 5;
RtlCopyMemory ( JmpCode+1, &JmpOffSet, 4 );
RtlCopyMemory ( ObReferenceObjectByHandle, JmpCode, 5 );
__asm
{
MOV eax, CR0
OR eax, 10000H
MOV CR0, eax
STI
}
KeLowerIrql(oldIrql);
return 1;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//否则再次HOOK这个函数
JmpOffSet= (char*)T_ObReferenceObjectByHandle - (char*)ObReferenceObjectByHandle - 5;
RtlCopyMemory ( JmpCode+1, &JmpOffSet, 4 );
RtlCopyMemory ( ObReferenceObjectByHandle, JmpCode, 5 );
__asm
{
MOV eax, CR0
OR eax, 10000H
MOV CR0, eax
STI
}
KeLowerIrql(oldIrql);
}
return 0;
}
VOID
fake_ObReferenceObjectByHandle (
IN HANDLE Handle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_TYPE ObjectType,
IN KPROCESSOR_MODE AccessMode,
OUT PVOID *Object,
OUT POBJECT_HANDLE_INFORMATION HandleInformation
)
{
NTSTATUS status;
WCHAR Name[300];
BOOL bFuck = FALSE;
PEPROCESS Process = NULL;
PUCHAR currentProcessName = NULL;
HANDLE ProcessID = NULL; // the owner process
status = OldObReferenceObjectByHandle( Handle, DesiredAccess, ObjectType, AccessMode, Object, HandleInformation);
_asm pushad
_asm pushfd
//
// 过滤操作
//
end:
_asm popfd
_asm popad
skip:
_asm nop
}