eprocess

memory). However, note that virtual addresses are obtained by the operating system, for example, the idea has not been put into practice, so it does not constitute any resource loss. for example, if we want to write A "UESTC" at 0x80000000, the operating system will map this virtual address to A physical address, you write this virtual address as A physical address. however, we only applied for a 1 kb virtual memory without reading/writing, and the system will not allocate any physical memory,

MDL (Memory Descriptor List) refers to the Memory Descriptor table, which contains the starting address, owner process, number of bytes, and flag of the Memory region. The MDL structure is defined in ntddk. h. The specific structure is as follows: Typedef struct _ MDL { Struct _ MDL * Next; CSHORT Size; CSHORT MdlFlags; Struct _ EPROCESS * Process; PVOID MappedSystemVa; PVOID StartVa; ULONG ByteCount; ULONG ByteOffset; } MDL, * PMDL; To modify the mem

structure of pimage_import_by_name is as follows: Typedef struct _ image_import_by_name { Word hint; Byte name [1]; } Image_import_by_name, * pimage_import_by_name; The structure of the above four definitions has been completed. Note that the module name to be hooked is the variable pc_dlltar, and pc_fnctar is the target function to be hooked. The structure of pmdl is as follows: // MDL references defined in ntddk. hTypedef struct _ MDL {Struct _ MDL * next;Cshort size;Cshort mdlflags;Struct _

(% 08x, % 08x, % 08x, % 08x, % 08x, % 08x, % 08x, % 08x) \ n ", threadhandle, desiredaccess, objectattributes, processhandle, clientid, threadcontext, initialteb, createsuincluded); conditions = NULL; // obtain the eprocess object objectstatus = processing (processhandle, process_all_access, psprocesstype, usermode, (pvoid *) Pprocess, null); If (objectstatus = STATUS_SUCCESS) {// processname = (char *) pprocess + 0X174; rtlstringcbcopya (processnam

(*, *. aspx, *. ashx) Http: // localhost: 10153/webform1.aspx OutputApplication_beginrequestGlobal_application_beginrequestApplication_authenticaterequestGlobal_application_authenticaterequestApplication_authorizerequestApplication_resolverequestcacheApplication_acquirerequeststateApplication_prerequesthandlerexecuteProcess all requests application_postrequesthandlerexecuteApplication_releaserequeststateApplication_endrequestApplication_presendr

Ba break on access, set access breakpoint SX sets exception breakpoint . Dump: Save the dump file ! Thread displays the information subset of the thread data structure. ! Teb displays all information about the Teb (thread environment block) structure. ! VM displays basic memory management information through memory-related performance counters. ! Process displays the specific process information, including the eprocess block. This command can only

specific registers (MSR). Day 2Critical data structures:process and thread data structures (eprocess, Ethread, Kprocess, Kthread), Kshared_user_data , kernel process and module list, processor control region (KPCR). system Mechanisms:interrupt Request levels (IRQL), interrupts, traps, system calls, service descriptor tables, Native API calls (Zw vs Nt), Read/write probes, exception handling, Kernel-user callbacks. Day 3Kernel Execution Environment:in

breakpoint, if there is no breakpoint to intercept, then how to Debug.To this debugactiveprocess function in the Ring3 under the analysis of the almost, left we can see the debugger and debug objects as parameters to call the system function zwdebugactiveprocessIs it clear what I'm trying to say about this system call doing something in the kernel? Obviously the kernel puts the debug object in the DebugPort field of the debugging process!But what zwdebugactiveprocess does in the kernel is more

In the previous article Windows callback monitoring #pragmaOnce#include#include#includeVOID Wpoff (); VOID Wpon (); VOID unloaddriver (Pdriver_object driverobject); VOID loadimagenotifyroutine (punicode_string fullimagename,handle processid,pimage_info ImageInfor);externchar*psgetprocessimagefilename (peprocess eprocess); VOID Unicodetochar (punicode_string unisource, CHAR*szdest); #include"LoadImage.h"Pimage_import_descriptor G_oldimportdesc; KIRQL I

virtual address space, VAD is a tree-like data structure, Each time a memory is allocated, a node that is attached to the Vad tree represents this block of user-State address space has been allocated, so if there is no heap mechanism, every time to allocate memory to operate the VAD tree. This is very inefficient, VAD is the structure of the kernel, is attached to the eprocess of the corresponding process, want to learn more about the Windows Kernel

In Windows 7, many kernel data structures have been changed, such as the eprocess offset. To use windbg for kernel debugging, do a few things 1. Run bcdedit-Debug on to enable debugging, and restart to take effect. 2. Download the symbol package to the http://www.microsoft.com/whdc/devtools/debugging/symbolpkg.mspx Windows 7 RC x86 retail symbols, All Versions 3. Add the Environment Variable _ nt_symbol_path as the installation path of the symb

Ntdll!_ethread+0x000 TCB: _kthread+0x200 createtime: _large_integer 0xff58b008+0x208 exittime: _large_integer 0x400000 ' 91334e00+0x208 keyedwaitchain: _list_entry [0x91334e00-0x400000] +0x210 exitstatus:800443912//Not 0 indicates end of thread+0x214 postblocklist: _list_entry [0x0-0x0]+0x214 Forwardlinkshadow: (NULL)+0x218 startaddress: (NULL)+0x21c terminationport:0x0000002c _termination_port+0x21c reaperlink:0x0000002c _ethread+0x21c keyedwaitvalue:0x0000002c+0x220 activetimerlistlock:0x590+0

in practice, such a possibility is negligible, so we do not have to worry about this. Why? Think logically-in order to start a process in kernel mode, the user must mount a driver, which in turn implies the execution of some user-mode code. Therefore, in order to prevent the execution of unauthorized programs, we can safely restrict the creation of processes that we control ourselves at the system level in user mode.Second,Defining PoliciesLet us first make it clear that the purpose of this is

;PCHAR Stringname =null;Status = Pslookupprocessbyprocessid (ProcessId, processobj);if (nt_success (Status)){Stringname = Psgetprocessimagefilename (processobj);Obfdereferenceobject (processobj);//eprocess structure is processimagefilename}return stringname;} VOID Mycreateprocessnotifyex ( __inout peprocess Process, __in HANDLE ProcessId, __in_opt pps_create_ Notify_info createinfo ) { char v1[16]={0}; if (createinfo!=null)//Process creation eve

Tags: tab address space IV use load required mode how user space1: Use!process 0 0 to get information about all the processes of the user space !process 0 0 NT ACTIVE PROCESS DUMP * * * *PROCESS 80a02a60 cid:0002 peb:00000000 parentcid:0000Dirbase:00006e05 objecttable:80a03788 tablesize:150.Image:system 。。。。。 2: Use the. process/p + you need to switch the eprocess address of the application to the address space of the application For example: . proce

target processes. If the source IL is smaller than the target IL, the system rejects the operation. If the source IL is greater than the target IL, the system permits the operation. Then, determine the AppContainer attribute. If the source and target are of the same IL and both are running in the AppContainer, determine whether the two meet the constraints of the SeIsParentOfChildAppContainer function. If the two meet the constraints, they are allowed. Otherwise, the AppContainer is den.Note: B

, and the value will be passed through win32k! The xxxSendMessage function is passed into win32k! XxxSendMessageTimeout (win32k on Win8! XxxSendTransformableMessageTimeout ). In user mode, the published exploit uses ZwAllocateVirtualMemoryAPI in 0xfffffffb to apply for memory and put a constructed win32k in this address! The tagWND struct. After the vulnerability is triggered, the kernel accesses the forged struct in this user mode. The constructed struct can change the program execution process

be done ). Developers usually obtain the information through the GetCurrentProcess and GetCurrentThread APIs. We can see the special case in the following code: #!cppNTSTATUS ObpReferenceProcessObjectByHandle(HANDLE ??????SourceHandle, ??????????????????????????????????????????EPROCESS* ???SourceProcess, ??????????????????????????????????????????..., ??????????????????????????????????????????PVOID* ??????Object, ???????????????????????????????????

Workaround: If you think your header file contains wood problems, try compiling it with the WDK build command, most likely because you haveVS + Easy SYSthe problem of the environmentThe use of the vs + easy SYS Build environment contains ke.h, which is a header file found on the web for use with eprocess and Ethread.In this environment, the compilation has been wrong. I have to say something loudly here:Mom B, how to flirt is not good ...As shown in t

system will map this virtual address to a piece of physical address A, you write this virtual address is equivalent to write physical address a. But join us only to apply for a 1KB of virtual memory space, not read and write, the system will not allocate any physical memory, The system allocates the appropriate physical space only when virtual memory is to be used. below to say some of the details, in fact, the management of virtual memory is a bunch of data structures to achieve, the followi