edi 845

769 Items in swapper_pg_dir. The first two items are linear address ing for the user, and the last two items are linear address ing for the kernel. The reason why two items in the global page directory can be mapped to 8 Mb is 2 × 1024 (1024 items in the page table) × 4 K (the size of one page) = 8 m. In fact, initializing the kernel page table is not a hard rule to map the first 8 MB of RAM. This depends on the configuration of your kernel (I think it is 8 Mb ing in most cases ). In startup_32

Game: tianlong Babu, version: 0.16.0108, System Windows XP, Tools : Ce5.2 + od1.10 + C #2005 Objective: To find the array format and location of strange data in the memory First, correct the search method of the character base address in Note 1. The specific search method is described below:1. Ce finds a unique address based on the person's experience or blood (in reality, I am based on experience)2. OD writes a breakpoint to memory under an empirical address0044bc28 8b46 0C mov eax, dword

*): decompile the code section of A. obj.Open the ursoft w32dasm tool (I use version 8.93)Select all files when opening the file, because the software mainly targets file formats such as PE, le, and NE. SoThe offset must be specified to decompile the OBJ file. Above attention! (Note: another way to obtain this information is to use dumpbin/section:. text ). That is, the file offset of the Code section.Therefore, in the prompt dialog box that opens the OBJ file, enter 00000355Start disassembly f

What do you call it? This time I want to use this technology to change the function of an API. I'm not sure if we can call it API redirection again. In this example, I redirect the CALC.EXE shellabout () dialog box to my "Hello world!" Message box (in Pemaker7.zip). You will see how easily you can implement it with the aforementioned code and make very few changes. ...//================================================================Push EDIPush ESIPush EBXMOV ebx,[ebp-10h]Push EBXPush EBXCall

Learning Goals:Mobile Item Function EncapsulationHomework:Extract the signature of the warehouse list base address, and add back to the warehouse list base address to update the code.BOOL Movegoodtodepot (char*szpgoodsname);//move the specified items in the backpack into the warehouse#define BASE_DEPOTLIST 0x31c9a24//Warehouse list base address DD [[0x31c9a24]+410+4*0]#define BASECALL_MOVEGOODS 0X007A0A20//Mobile Item CallAdd the following member functions in the Backpack list structureBOOL selg

, 29Ch80542599 c686400000001 mov byte ptr [esi + 140 h], 1805425a0 3bec cmp ebp, esp805425a2 758d jne nt! KiFastCallEntry2 + 0 x 49( 80542531)805425a4 83652c00 and dword ptr [ebp + 2Ch], 0805425a8 f6462cff test byte ptr [esi + 2Ch], 0FFh805425ac 89ae34010000 mov dword ptr [esi + 134 h], ebp805425b2 0f8538feffff jne nt! Dr_FastCallDrSave (805423f0)805425b8 8b5d60 mov ebx, dword ptr [ebp + 60 h]805425bb 8b7d68 mov edi, dword ptr [ebp + 68 h]805425be 895

;Farproc closehandleadd;Farproc writefileadd;Farproc createfileaadd;Farproc getmodulehandleaadd;Farproc procloadlib; Farproc apifnadd [1];Farproc procgetadd = 0; Char * stradd, * stradd1, * fmtstr;Int imgbase, fnbase, K, L;Int findaddr;Handle libhandle;DWORD ret; // Create an exception handling code for our own Exception Handling Code_ ASM {// INT 3MoV eax, 1JMP nextcallGetstradd:Pop straddLea EDI,MoV eax, dword ptr fs: [0]MoV dword ptr [

. Recently, because of a "small problem", the kernel level of Linux kernel and FreeBSD has beenTracking and debugging, and then discovering a very interesting problem, I feel that this problem may be different from the Linux shellcode andThe shellcode differences under FreeBSD are also slightly related to the system architecture. The following content isThe following is a compilation of syscall code.In Linux, the application uses the following code to call syscall:420d4330 55 push EBP |420d4331

szReadBuffer3Mov jjj, esiMov esi, offset szReadBuffer2@@:Mov al, [esi]Movzx eax, alMov edi, offset dubisMov ecx, 17Repne scasbXor eax, eaxMov al, 16Sub eax, ecxShl eax, 04Mov ecx, jjjMov [ecx], alInc esiMov al, [esi]Movzx eax, alMov edi, offset dubisMov ecx, 17Repne scasbXor eax, eaxMov al, 16Sub eax, ecxMov ecx, jjjOr [ecx], alInc jjjInc esiInc jjj2. If jjj2 = 34Jmp @ F. EndifJmp @ B@@:;__________________

(Contact feeling processing is a bit complex, involving multiple loops, later by the people reminded that the process also involves linked list operations) First, the assignment operation,%edx=%ebp+8 (that is, the input string start address, also phase_6 passed in parameters) stored at the value,%eax=%ebp-24, and%eax and%edx into the stack, call read_six_numbers function, its functions are described earlier.　　Then the read out of the corresponding processing of the number, followed by a la

1. Debug versionintMain () {011752E0 push ebp 011752E1 mov ebp,esp 011752E3 sub esp,0c0h 011752E9 push EBX 011752EA push esi 011752EB push EDI 011752EC Lea EDI,[EBP-0c0h] 011752F2 mov ecx,30h 011752F7 mov eax,0cccccccch 011752FC rep stos dword ptr Es:[edi] cout5; 011752FE mov esi,esp01175300Push5 01175302mov ecx,dword ptr ds:[1180090h]01175308Call dword ptr ds:[

;>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>; Code Snippets;>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>. CodeSzbuffer db DUP (0);>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>MYINTFUNC procPush edxCall EAXIretdMyintfunc ENDP ;====================================================================addmyint proc uses EDILocal @IDT sidt szbuffer mov EDI, (Idt_reg ptr [szbuffer]). Base

("[+] Trying to unload: % s", argv [2]);Delete_driver (SC, name );}Getch ();}/* Wdl. c ends */ Driver samples with Vulnerabilities This is a sample code with a vulnerability driver. We will try to attack it later in this article. This driven framework model is based on Iczelion. ; Buggy. asm start. 386. Model flat, STDCALLOption casemap: NONEInclude d: masm32demodewindows. incINCLUDE incstring. INCINCLUDE inctstruc. INCINCLUDE inctddk. INCINCLUDE inctoskrnl. INCINCLUDE incNtDll. INCIncludelib d

Kifastcallentry routine:Nt! KISYSTEMSERVICE+0X5A:805424AB C74508000ddbba mov dword ptr [ebp+8],0badb0d00h805424B2 895d00 mov dword ptr [EBP],EBX805424B5 897D04 mov dword ptr [Ebp+4],edi805424b8 F6462CFF test byte ptr [ESI+2CH],0FFH805424BC 0f858afeffff jne nt! Dr_kss_a (8054234c)805424C2 FB STI805424C3 e9e7000000 jmp nt! kifastcallentry+0x8f (805425AF) ; jump to KifastcallentryThen take a look at what's being jumped in the kifastcallentry:Nt! kifastcallentry+0x8f:805425AF 8bf8 mov

References: %defineparamesp124% definesrcparam0 % definedstparam4 % definelenparam8 % unknown: Unknown, [src]; sourcearraymovedi, [dst]; destinationarraymovecx, [len]; numbero References: %%%%%%definedstparam4% definelenparam8 % defineCACHEBLOCK400h _ fast_memcpy9: pushesi pushedi pushebx movesi, [src]; sourcearray movedi, [dst]; destinationarray movecx, [len]; numbero Reference: Global _ fast_memcpy9 % Define param esp + 12 + 4% Define src param + 0% Define dst param + 4% Define len param

information is used for debugging: Cmp [esi + eax-06h], 'kcuf' Jne DisableOnBusy 　　 ENDIF 　　 Determine whether the file exists. if not, switch to DisableOnBusy. Cmp word ptr [ebx + 18 h], 01 h Jne DisableOnBusy 　　 ; Get file attributes Mov ax, 4300 h Int 20 h; call IFSMgr_Ring0_FileIO to obtain file attributes IFSMgr_Ring0_FileIO = $ Dd 00400032 h; call number 　　 Jc DisableOnBusy Push ecx 　　 ; Get the IFSMgr_Ring0_FileIO address Mov edi, dword ptr (I

relatively * sure everything is OK. this routine will be over-* written by the page tables. * // ** the following section sets the Interrupt Descriptor Table subroutine setup_idt. ** Set the idt of the Interrupt Descriptor Table to have 256 Items and point to the ignore_int interrupt gate. Then load the interrupt * Descriptor Table register (using the lidt command ). Install the service after a real and practical disconnection door. Enable the interrupt when we think everything is normal elsewh

code. The complete code for searching getprocaddress in Kernel32 is as follows: Push ESI; ESI = va kernel32.base; EDI = RVA k32.pehdrMoV EBP, ESIMoV EDI, [EBP + EDI + Peh. datadirectory] Push EDI ESI MoV eax, [EBP + EDI + peexc. addressofnames]MoV edX, [EBP +

00 ................ 0x00401010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0x00401020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ All are 0.1.1.2 dynamic compilation According to the online materials, this section is related to incremental links and dynamic compilation. Check the linker parameters to ensure that the incremental link is opened for verification. Insert a test function before the main function and call it in main: Int add (int A, int B) { Return A +

, special registers (control, debug, segment)Can only be transmitted to the general register, or to the content transmitted from the General Register.When referencing a label:Cases:. Section. DataValue. int 100_start:MOVL value,%eaxMOVL $value,%eaxMovl%ebx, (%edi)MOVL%EBX, 4 (%edi)Where: Movl value,%eax simply passes the memory value currently referenced by the tag value to EAXMOVL $value,%eax passes the me