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[Author mailbox]: a474528738@163.com[Software name]: XXX email promotion[Tools]: OD, exeinfoPE[Operating platform]: XP SP3[Author's statement]: I am only interested and have no other purpose. For errors, please enlighten us!--------------------------------------------------------------------------------[Detailed process]The Zp shelling instance information is relatively small in our forum. I saw a ZP shelling software on my computer, so I took it off and wrote it to me.. Mistakes and omissions a

, this problem is not representative. Uncle Bill's staff missed the widechar length, released the variables on the stack as a heap, and added the address content to the user, the only difference is that we don't have to confuse hexadecimal with hexadecimal. However, since the organizer writes it like this, let's take a look. In fact, after reverse partitioning, You can overwrite ret as a template, and then find jmp esp in the code page. Then, it's eas

QQ: 1151639935 Today, when I was studying the process of virus infection with PE executable files, I occasionally found that programs compiled by the VB6.0 compiler have a feature, that is, it can prevent the infection of some viruses (note that it can only prevent the infection of some viruses ). So what exactly is this? See the following analysis: After learning the principles of virus infection PE files, I tried to manually infect another PE program to verify the accuracy of my knowledge. The

tag: blog OS Ar data 2014 Div art log on /*************************************** * ************ Name: the 4byte platform for the standard redfa remote control receiver is: the sn8p2511 mode is set to 100u *************************** **************************/; register definition sts1 DS 1f_irecok equ sts1. 0; receive a pair of Data t_irsta DS 1t_irnumposi DS 1; High level counter r_irdat1 DS 1; Receive Buffer r_irdat2 DS 1r_irdat3 DS 1r_irdat4 DS limit DS 1; the data received successfully; th

program: Int iarray [8]; Below are the values of iArray and its elements obtained in C and Assembly expressions: _ AsmCSizeLENGTH iArraySizeof (iArray)/sizeof (iArray [0])8SIZE iArraySizeof (iArray)32TYPE iArraySizeof (iArray [0])4 8. Notes The comments in the assembly language can be used in inline assembly, that is, ";". For example: _ Asm mov eax, OFFSET pbBuff; Load address of pbBuff The C/C ++ Macro will be moved to a logic line. To avoid confusion caused by the use of assembly langu

Vbprogram anti-virus features and Virus Infection Author: Fu Bo Lanzhou University of Technology International Trade Major QQ: 1151639935 Today, when I was studying the process of virus infection with PE executable files, I occasionally found that programs compiled by the VB6.0 compiler have a feature, that is, it can prevent the infection of some viruses (note that it can only prevent the infection of some viruses ). So what exactly is this? See the following analysis: After learning the princi

programmers to directly operate on it.We use the CS register as an example. The same is true for other registers:In realIn mode, when we execute a command to load the CS register (JMP, call, RET, etc.), the relevant values will be loaded into the visible part of the CS register, however, the CPUSee the content in the section to set the invisible part. For example, Run "ljmp x1234, $ go"Then, the visible part of the CS register is 1234 h, and the invi

should execute kernel.This is easy to implement in assembly language. Isn't it okay to use a JMP command?However, you must pay attention to some details when using JMP. MoV ax, 0x500; jump command to 0x500: 0000, and change es and DS to 0x500, but note that CS cannot be changed before JMP commandMoV es, axMoV ds, axJMP 0x0500: 0x0000 The red above is the code fo

Introduction: API Interception is not a new technology. Many commercial software use this technology. There are two methods to intercept Windows API functions. The first one is Mr. jeffrey Richter's module input section for modifying the EXE file. This method is safe, but complicated. In addition, some EXE files do not have a list of DLL input symbols, blocking may fail. The second method is the commonly used jmp xxx method. Although it is very old,

principle of word extraction.First, let me explain the hook problem. The hook is indeed used in the word overlord, and he uses two types of hooks, one of which is the Windows Standard hook. He uses setjavaswhook to install a callback function, which installs a mouse hook, it is used to respond to the mouse message in a timely manner and does not have much to do with word retrieval.Another type of Hook is API hook, which is the core technology of word retrieval. He wrote a

determined that the content of the hidden part is consistent with the content of the segment descriptor (see the format of the segment description ), however, the format may be different. But the format is not important for us to understand this, because it is impossible for programmers to directly operate on it. We use the CS register as an example. The same is true for other registers: In real mode, when we execute a command to load the CS register (JMP