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EAX register to the memory location specified by value. Use the memory location of the variable address. as follows, multi-memory specifies multiple values in one command:values:. int 10,20,30,40,50,60,70this creates a series of data values that are contiguous in memory (similar to an array of high-level languages). When referencing data in an array, you must use the system to determine which memory location you want to access. The memory location is determined by the following expression:base_
If you returned a struct object, what would the return statement do? Here is the test code #include using namespace Std;struct BIG{Char buf[100];int i;Long D;}B,B2;Big Bigfun (Big B){b.i=100;return b;}int main (){B2=bigfun (B);return 0;}To set a breakpoint at the beginning and end of main8:int Main ()19: {004012A0 Push EBP004012A1 mov Ebp,esp004012a3 Sub esp,118hPuzzled at first, and analyzed for a long timeThe original (118h-40h) remaining memory block holds two big variablesLow address put bi
+ 00000128] In this case, EAX = NextThread (ETHREAD structure) 0008: 80467E17 sub esp, 0C0008: 80467E1A MOV [ESP + 08], ESI0008: 80467E1E MOV [ESP + 04], EDI0008: 80467E22 MOV [ESP], EBP0008: 80467E25 mov esi, EAX0008: 80467E27 mov edi, [EBX + 00000124] Note: CurrentThread (ETHREAD structure)0008: 80467E2D mov dword ptr [EBX + 00000128], 000000000008: 80467E37 MOV [EBX + 00000124], ESI0008: 80467E3D mov ecx, EDI0008: 80467E3F CALL 8042F944 Note: KiRe
Author: bzhkl Time: 2008-12-11,12: 01 Chain: http://bbs.pediy.com/showthread.php? T = 78464 Previously, I tried to detect a hidden process and then solved it with the method of brute force enumeration. But the hook swapcontext didn't see complete code. So I collected some useful modules on the Internet and integrated them to implement support. xp3, xp2 should be supported even if it is not tested. Complete project code Difficulty: there are still some details about obtaining the swapcontext ad
esi, [edx + 0x3c]; Lea ESI, [edx + esi]; mov esi, [esi + 0x78]; Lea ESI, [edx + esi]; mov edi, [esi + 0x1c]; Lea EDI, [edx + edi]; MOV[EBP-0X04], EDI; mov
Everyone knows that to use COM components in a program, you must first call coinitialize. This function is mainly used to initialize the com runtime environment. But does the function scope take the thread as the unit or the process as the unit? Maybe you have figured out the answer through the test program. That's right, it's a thread. Today, we will go into a bit more detail and confirm our ideas by analyzing the specific implementation of coinitialize. Let's take a look at coinitialize compil
]; Lea ESI, [edx + esi]; mov esi, [esi + 0x78]; Lea ESI, [edx + esi]; mov edi, [esi + 0x1c]; Lea EDI, [edx + edi]; MOV[EBP-0X04], EDI; mov edi
"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
is filled, the cmp [Addr] And 0xff will be used to determine whether to check the encryption option for processing. There is Magic JUMP, but the Shell API address has been redirected, and the Patch code needs to be restored.>The code is not optimized, and there is no time to optimize it. There are too many records to analyze the main program.The Patch code is as follows:Code:00B60000 60 pushad00B60001 9C pushfd00B60002 BE 00104000 mov esi, 0x401000 Code segment Addr00B60007 BF 00404000 mov
at the various flags. Let's take a look at the key points in rtlfreeheap. Key Aspect 1001b: 77fcc829 8a4605 mov Al, [ESI + 05] // ESI points to the start address of the buf2 8-byte management structure, namely, the Al flag001b: 77fcc82c a801 test Al, 01 // whether the flag value contains heap_entry_busy001b: 77fcc82e 0f84a40e0000 JZ 77fcd6d8 // skip if not included. Skip here001b: 77fcc834 f6c207 test DL, 07001b: 77fcc837 0f859b0e0000 jnz 77fcd6d8001b: 77fcc83d 807e0440 CMP byte PTR [ESI + 04],
returned.XOR eax, eaxMoV ESI, LPXMoV ECx, n@@:MoV edX, [ESI + eax * 4]Test edX, EDXJnz exitINC eaxCMP eax, ECxJl @ BMoV eax, 1RETExit:XOR eax, eaxRET_ Iszero endp;-----------------------------------------------------------_ Add proc N: DWORD, LPX: DWORD, lpy: DWORD; X + = yMoV EDI, LPXMoV ESI, lpyXOR ECx, ECx; carryMoV eax, nDec eax; n-1 subscript@@:MoV edX, [ESI + eax * 4]Add edX, ECxAdd edX, [EDI + eax *
Lucifer.; #########################################################################. 386. Model flat, stdcall; -bit memory model option Casemap:none; Case sensitive include \masm32\include\kernel32.inc; ------------------------------------ ; Please read the final usage of the text; ------------------------------------ARGCL PROTO:D Word,:D Word. Code; ######################################################################## #ArgCl proc Argnum:dword, ItemBuffer:D Word local cmdline:D word local c
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]
1-2 solutions 1. For previous servers, you can "migrate" them to a VM of VMware gsx server or VMware ESX Server. VMware gsx server or VMware ESX Server can run multiple "virtual" servers simultaneously on one server, and the "virtual" server provides the same external services as the physical host, this can save money, reduce space occupation, reduce management burden and operation costs. 2. for NetWare
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