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Pus H 283e917ad 83c208 Add edx,883e917b0 9d popfd83e917b1 804c240102 or byte ptr [esp+1 ],283e917b6 6a1b push 1bh83e917b8 ff350403dfff push DWORD ptr ds:[0ffdf0304h]83e917be 6a00 Push 083e917c0 ebp83e917c1 ebx83e917c2 push esi83e91 7C3 edi83e917c4 push 648b1d1c000000 mov ebx,dword ptr fs:[1ch]//Important Get KPCR yourself 83E917CB 6a 3b Push 3BH83E917CD 8bb324010000 mov esi,dword ptr [ebx+124h]//Important Get current execution thread ethread83e917d3 ff33 push DWORD ptr [EBX]83E917D
0013b8820013b882 "uuu" Rasmans + 0xcc3c:7e51cc3c 59 pop ecx012cd128 7e51cc3c 02f1be72 0013b88a0013b88a "ppp" You can use OD to look at the relevant code near the return address above. 7E51CB81/$ mov edi, edi7E51CB83 |. push ebp7E51CB84 |. mov ebp, esp7E51CB86 |. push ebx7E51CB87 |. push esi7E51CB88 |. mov esi, dword ptr [ebp + 8]7E51CB8B |. xor ebx, ebx7E51CB8D |. push edi7E51CB8E |. mov dword ptr [ebp + 8], ebx7E51CB91 |. jmp 7E51CC927E51CB96 |>/
createfilemapping or eax, eax je error_filemap mov hmap, eax push 0 push 0 push 0 push 6 push eax call mapviewoffile; file ing to memory or eax, eax je Error_map mov pfile, eax mov EDI, eax mov ESI, offset gdtflag mov ECx, dwfilesize:; search for the descriptor Inc EDI push ESI push EDI push ECx mov ECx in ntldr, 10 h repz cmpsb pop ECx pop
locations are typically on the stack, but may also be in registers; this is specified by calling conventions. Program Execution jumps to the address of the called function. Inside the function, registers ESI, EDI, EBX, and EBP are saved on the stack. The part of code that performs these operations is calledFunction PROLOGAnd usually is generated by the compiler. The function-specific code is executed, and the return value is placed into the eax re
or server of the recipient, and stores it in the corresponding mailbox; the recipient can open his or her own mailbox through the network workstation at any time, Review the messages that you receive. Advanced e-mail systems can provide "text box", "voice mail," Graphic image box "and other types of electronic postage functions, supporting data, text, voice, graphics, images and other multimedia messages, and can be a variety of programs, data files as attachments to e-mail messages sent. Ther
"Copyright Notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet, the article only for learning Exchange, do not use for commercial purposes"in high-level languages, we often manipulate strings, such as string copies, comparisons, lookups, and so on. There are also commands for implementing these operations in assembly language. This section describes the string transfer related Operations command in assembly language. The Movs instruction can transfer a s
This article describes the C language embedded API memory search engine method, shared for everyone to reference. The implementation methods are as follows: Copy Code code as follows: ApisearchEngine.cpp:Defines the entry point for the console application. // #include "stdafx.h" #include DWORD __stdcall Getstrlengtha (char* szName) { _asm { Push EDI Push EBX mov eax, szName mov edi
are eax,ebx,ecx,edx,edi,esi. These registers can be used arbitrarily in most directives. However, some instructions restrict the use of some of these registers for some purpose, such as the Division directive IDIVL the dividend in the EAX register, the edx register must be 0, and the divisor can be any register. The quotient of the calculated result is stored in the EAX register (covering the divisor), and the remainder is stored in the edx register.
First hang up the code,The original function author for the unknown Foreigner, the source for the MASM32 development package, here to express thanks. Chinese comments Modified added by Lao Liu: 486 model flat, stdcall option Casemap:none. codeopt ION prologue:none OPTION epilogue:none align 4StrLen proc item:dword mov eax, [esp+4]; Gets the parameter item, which is the string pointer Lea edx, [eax+3]; edx= pointer +3 push EBP; back up EBP EDI push
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
shellcodeShellCodeB: mov eax, fs: 30 h; PEB address mov eax, [eax + 0ch]; LDR address mov esi, [eax + 1ch] lodsd mov edi, [eax + 08 h]; if Windows xp is unavailable, you can get the kernel32 address/* xor ecx, ecxnext_module: mov e Bp, [esi + 0x8] mov edi, [esi + 0x20] mov esi, [esi] cmp [edi + 12*2], cx jne next_module mov
A repeated instruction is a set of instructions for operating the data buffer. The data buffer is usually a byte array, which can be a single word or double word. (Intel 'calls these commands string commands) The most common data buffer operation commands are movsx, CMPs, stosx, and scasx. X can be B or W, and D represents byte, word, and dual-word, respectively. These commands are valid for any form of data. In these operations, the ESI and EDI reg
Let's first look at the static compilation result of a simple code: #include "stdafx.h"int _tmain(int argc, _TCHAR* argv[]){01041380 55 push ebp 01041381 8B EC mov ebp,esp 01041383 81 EC C0 00 00 00 sub esp,0C0h 01041389 53 push ebx 0104138A 56 push esi 0104138B 57 push edi 0104138C 8D BD 40 FF FF FF lea
Since the initial value of the dynamic array in Delphi is not always 0, setlength is used before each use of a one-dimensional array, and then fillchar is generally used for clearing, however, if the array is more than dozens of MB, the efficiency of fillchar is very low. For this reason, I specifically wrote some optimization code for clearing the array or memory. Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->1. Use the MMX command to optimiz
Cracking Device Monitor Author: rockhwndTime: 2004.8.10Web: http://blog.csdn.net/rockhwnd When device Monitor starts, it reads a file named license. DM in its directory and determines whether the file has been registered based on the content. The code for reading the file and analyzing the file content isC:/program files/common files/HHD software/device Monitor/silk. dll fileSo the createfile breakpoint : 67f917af ff15d041f967 call dword ptr [67f941d0] // createfile open the file: 67f917b5 8bf8
INT3 017f:1003d211 7c24 JL 1003d237 (NO JUMP) 017f:1003d213 0801 OR [ecx],al 017f:1003d215 0f8581010000 jnz NEAR 1003d39c 017f:1003d21b Pusha 017f:1003d21c be00a00210 MOV esi,1002a000 "R eip eip-1", "D EIP", the 017f:1003d210 place to 80H: 017f:1003d210 807c240801 CMP BYTE [esp+08],01 017f:1003d215 0f8581010000 jnz NEAR 1003d39c 017f:1003d21b Pusha 017f:1003d21c be00a00210 MOV esi,1002a000 017f:1003d221 8DBE0070FDFF LEA edi,[esi+fffd7000]
*hebing = [componentsjoinedbystring:@ ":"];NSLog (@ "----%@", hebing);/*2014-12-16 09:10:07.101 basicoc[837:12532] ==opp2014-12-16 09:10:07.102 basicoc[837:12532] ==ack2014-12-16 09:10:07.102 basicoc[837:12532] ==dwdew2014-12-16 09:10:07.103 basicoc[837:12532] ==oooo2014-12-16 09:10:07.103 basicoc[
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 [
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