m2ts to mov

carried out in assembly, let's talk about some personal opinions. Next, we will conduct some small tests and explain them in assembly language. You can do it together. (1) Char name [] and char * Name [CPP] View plaincopy 1: 2:VoidProcess () 3 :{ 00401020 push EBP 00401021 mov EBP, ESP 00401023 sub ESP, 4ch 00401026 push EBX 00401027 push ESI 00401028 push EDI 00401029 Lea EDI, [ebp-4Ch] 0040102c

Note that there are programs and test programs. For example, exp1303.asm refers to Chapter 13's third question. exp1303. ASM refers to the test of exp1303 program... ; Exp1301.asm Install the 7ch Interrupt RoutineFunction: calculates the square of a word number.;;Assume Cs: Code Code segmentStart:; Copy the code to a non-system management areaMoV ax, CSMoV ds, axMoV Si, offset sqr; copy from sqr of CS segment to 0: 200 MoV ax, 0MoV es, axMoV Di, 200

talk about some personal opinions. Next, we will conduct some small tests and explain them in assembly language. You can do it together. (1) char name [] and char * name 1: 2: void process () 3 :{ 00401020 push ebp 00401021 mov ebp, esp 00401023 sub esp, 4Ch 00401026 push ebx 00401027 push esi 00401028 push edi 00401029 lea edi, [ebp-4Ch] 0040102C mov ecx, 13 h 00401031

In Windows 7x86, the implementation of the kernel module NT (that is, the ntkrpamp module: Offset machine code command nt! Memset: 83c8ce40 8b54240c mov edX, dword ptr [esp + 0ch] 83c8ce44 8b4c2404 mov ECx, dword ptr [esp + 4] 83c8ce48 85d2 test edX, edx83c8ce4a 744f je nt! Memset + 0x5b (83c8ce9b) 83c8ce4c 33c0 XOR eax, eax83c8ce4e 8a442408 mov Al, byte PTR [esp

model. Of course, this security model consists of multiple periods. Sometimes user-State jobs cannot be completed without the core-level functions, which is why native APIs are introduced. Native APIs are non-documented internal function sets and run in kernel mode. Native APIS exist to provide some ways to securely call kernel-mode services in user mode. A user application can call the native API exported by NTDLL. dll. A large number of functions exported by NTDLL. dll are used to en

critical module Base address mov esi, DWORD ptr fs: [0x30]; mov esi, [esi + 0x0c]; mov esi, [esi + 0x1c]; mov esi, [esi]; mov edx, [esi + 0x08]; Gets the function address of

push EAX; block table size push edx; edx is the offset of the Virus code block table push esi; buffer address 　　 Combined virus code block and Virus code block table must be less than or equal to the amount of space not used Inc ECX push ecx; Save numberofsections+1 　　 SHL ecx, 03h; multiply 8 push ecx; reserved virus block table space 　　 Add ecx, eax add ecx, edx; offset of the body of the ecx+ file 　　 Sub ecx, (sizeofheaders-@9) [esi] Not ECX Inc ECX; ecx for file header size-offset of

Share notesFilter function (called by __except (filtered expression) after an exception occurs) DWORD Filters (DWORD code, Pexception_pointers exceptioninfo) {/* This is just a test that captures what type of exception (depending on the situation) is determined by the condition, except for the 0 exception. Switch (Code) {//Memory access exception case Exception_access_violation:break; Except for 0 exception case Status_integer_divide_by_zero: {int a = 10; 012C44E1

1. Simple Man-Machine Interaction Stacka segment DB 100 DUP (?) Stacka ends Data Segment Mess1 dB 'What is your name? ',' $' Mess2 dB 'How old are you? ',' $' Buf1 dB 20 DB? DB 20 DUP (?) Buf2 dB 15 DB? DB 15 DUP (?) Data ends Code segment Assume Cs: code, DS: data, SS: stacka Main proc far Start: PUSH DS MoV ax, 0 PUSH AX MoV ax, Data MoV ds, ax

will break down the BPX shell_policyicona breakpoint and use F12 to check if the software is called and the parameters are used! First come to the following: Here is where the software is called at startup: * Possible reference to string resource id = 00114: "CCProxy"|: 00408770 6a72 push 00000072: 00408772 51 push ECx: 00408773 c681_f0000000005 mov byte PTR [esp + 000024f4], 05: 0040877b e8c0890100 call 00421140: 00408780 83c408 add ESP, 00000008: 0

be viewed through the linux system, but the stack frame Implementation of centos7 seems to be somewhat different, and the same code cannot run on centos7. The following is a Disassembly 1 int main() 2 { 3 00A118E0 push ebp 4 00A118E1 mov ebp,esp 5 00A118E3 sub esp,0D8h 6 00A118E9 push ebx 7 00A118EA push esi 8 00A118EB push edi 9 00A118EC lea edi,[ebp-0D8h] 10 00A118F2

__stdcall __cdecl __fastcall vc6.0:int __stdcall/__cdecl/__fastcall Add (int x, int y){return x+y;}void Main (){Add (2,3);}1.__stdcall:1:int __stdcall Add (int x, int y)2: {00401020 Push EBP00401021 mov Ebp,esp00401023 Sub esp,40h00401026 push EBX00401027 push ESI00401028 Push EDI00401029 Lea edi,[ebp-40h]0040102C mov ecx,10h00401031 mov eax,0ccccccc

is not running in the compiler environment and does not include to declare functions, there is no function table for the application. Therefore, shellcode needs to find its own API function address and then forcibly call it.(1) Find the kernel32.dll base address:The APIs used in the shellcode are generally unrelated to the user interface, because it is used in kernel32.dll to do bad things. Therefore, we must first find the base address of kernel32 to further find the specific address of each A

: 0040823co. Text: 00408284. Text: 00408284 m_l_table = dword ptr-58 h. Text: 00408284 m_ B = DWORD PTR-18 h. Text: 00408284 M_a = dword ptr-14 h. Text: 00408284 m_k = dword ptr-10 h. Text: 00408284 m_j = dword ptr-0ch. Text: 00408284 m_ I = DWORD PTR-8. Text: 00408284 l_key = dword ptr-4. Text: 00408284. Text: 00408284 push EBP. Text: 00408285 mov EBP, ESP. Text: 00408287 add ESP, 0ffffffa8h. Text: 0040828a mov