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PsActiveProcessHead的定义：
在windows系统中，所有的活动进程都是连在一起的，构成一个双链表，表头是全局变量PsActiveProcessHead，当一个进程被创建时，其ActiveProcessList域将被作为节点加入到此链表中；当进程被删除时，则从此链表中移除，如果windows需要枚举所有的进程，直接操纵此链表即可。
ULONG FindPsActiveProcessHead1()
{
//1.从KdEnableDebugger地址找到KdInitSystem地址
//nt!KdEnableDebugger 804f7810
//804f7837 6a00 push 0
//804f7839 6a00 push 0
//804f783b c605ecab558001 mov byte ptr [nt!PoHiberInProgress (8055abec)],1
//804f7842 e8f7951600 call nt!KdInitSystem (80660e3e)
//804f7847 e8649a1600 call nt!KdpRestoreAllBreakpoints (806612b0)
ULONG i;
PCALL_CODE pCall;
PUCHAR pKdInitSystem=NULL;
PUCHAR p=(PUCHAR)GetExportFuncAddress(L"KdEnableDebugger");
KdPrint(("KdEnableDebugger地址=%x\n",p));
if (!p)
{
KdPrint(("获取KdEnableDebugger地址失败\n"));
return 0;
}
for (i=0;i<100;i++,p++)
{
if ((*p==0x6a)&&
(*(p+1)==0x00)&&
(*(p+2)==0x6a)&&
(*(p+3)==0x00)&&
(*(p+4)==0xc6)&&
(*(p+5)==0x05)&&
(*(p+0xb)==0xe8)&&
(*(p+0x10)==0xe8) )
{
pCall=(PCALL_CODE)(p+0xb);
pKdInitSystem=p+0xb+pCall->address+5;
KdPrint(("KdInitSystem地址=%x\n",pKdInitSystem));
break;
}
}
if (!pKdInitSystem)
{
KdPrint(("获取KdInitSystem地址失败\n"));
return 0;
}
//2.从KdInitSystem地址找到KdDebuggerDataBlock地址
//nt!KdInitSystem 80660e3e
//80660e8e 6890020000 push 290h
//80660e93 68606b5480 push offset nt!KdDebuggerDataBlock (80546b60)
//80660e98 be74926780 mov esi,offset nt!KdpDebuggerDataListHead (80679274)
p=pKdInitSystem;
for (i=0;i<100;i++,p++)
{
if ((*p==0x68)&&
(*(p+5)==0x68)&&
(*(p+0xA)==0xbe))
{
pCall=(PCALL_CODE)(p+5);
KdPrint(("KdDebuggerDataBlock地址=%x\n",pCall->address));
KdPrint(("PsActiveProcessHead地址=%x\n",((PKDDEBUGGER_DATA64)pCall->address)->PsActiveProcessHead));
return ((PKDDEBUGGER_DATA64)pCall->address)->PsActiveProcessHead;
}
}
KdPrint(("获取KdDebuggerDataBlock地址失败\n"));
return 0;
}
NTSTATUS FindPsActiveProcessHead(ULONG *pPsActiveProcessHead)
{
PEPROCESS process;
PLIST_ENTRY pList=NULL;
NTSTATUS status=PsLookupProcessByProcessId((HANDLE)4,&process);
if (!NT_SUCCESS(status))
{
KdPrint(("获取process失败\n"));
return status;
}
//xp _EPROCESS +0x088 ActiveProcessLinks : _LIST_ENTRY
pList=(PLIST_ENTRY)((PUCHAR)process+0x88);
KdPrint(("PsActiveProcessHead地址=%x\n",pList->Blink));
*pPsActiveProcessHead=(ULONG)pList->Blink;
ObDereferenceObject(process);
return status;
}
ULONG FindPsActiveProcessHead3()
{
ULONG addr=*(PULONG)PsInitialSystemProcess;
//xp _EPROCESS +0x088 ActiveProcessLinks : _LIST_ENTRY
PLIST_ENTRY pList=(PLIST_ENTRY)(addr+0x88);
KdPrint(("PsActiveProcessHead地址=%x\n",pList->Blink));
return (ULONG)pList->Blink;
}
ULONG FindPsActiveProcessHead4()
{
PLIST_ENTRY pList;
PKDDEBUGGER_DATA64 pKdDebuggerData;
PDBGKD_GET_VERSION64 pKdVersionBlock=(PDBGKD_GET_VERSION64)(*(PULONG)(0xffdff000+0x34));
KdPrint(("获取到DebuggerDataList地址=%x\n",pKdVersionBlock->DebuggerDataList));
pList=(PLIST_ENTRY)pKdVersionBlock->DebuggerDataList;
KdPrint(("pList->Flink=%x,pList->Blink地址=%x\n",pList->Flink,pList->Blink));
pKdDebuggerData=(PKDDEBUGGER_DATA64)pList->Flink;
KdPrint(("PsActiveProcessHead地址=%x\n",pKdDebuggerData->PsActiveProcessHead));
return pKdDebuggerData->PsActiveProcessHead;
}
ULONG FindPsActiveProcessHead5()
{
PLIST_ENTRY pList;
DBGKD_GET_VERSION64 KdVersionBlock;
PKDDEBUGGER_DATA64 pKdDebuggerData;
ZwSystemDebugControl NtSystemDebugControl;
NtSystemDebugControl=(ZwSystemDebugControl)GetSSDTAddrFromIndex(255);
KdPrint(("NtSystemDebugControl函数地址=%x\n",NtSystemDebugControl));
NtSystemDebugControl(SysDbgSysGetVersion,NULL,0,&KdVersionBlock,sizeof(DBGKD_GET_VERSION64),NULL);
KdPrint(("DebuggerDataList=%x\n",KdVersionBlock.DebuggerDataList));
pList=(PLIST_ENTRY)KdVersionBlock.DebuggerDataList;
KdPrint(("获取到KdDebuggerDataBlock地址=%x\n",pList->Flink));
pKdDebuggerData=(PKDDEBUGGER_DATA64)pList->Flink;
KdPrint(("PsActiveProcessHead地址=%x\n",pKdDebuggerData->PsActiveProcessHead));
return pKdDebuggerData->PsActiveProcessHead;
}
jpg 改 rar驱动中获取PsActiveProcessHead变量地址的五种方法也可以获取KdpDebuggerDataListHead
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原文地址：http://www.cnblogs.com/kuangke/p/5597020.html
