gxs edi

-4] 00401273 call @ ILT + 0 (Manager ::~ Manager) (00401005) 00401278 pop EDI 00401279 pop ESI 004020.a pop EBX 004010000b add ESP, 44 h 0040da-e cmp ebp, ESP 00401280 call _ chkesp (00408760) 00401285 mov ESP, EBP 00401287 pop EBP We found that the manager structure and analysis structure are also simple. A constructor is constructed when a variable appears. When will the structure be analyzed? The function is analyzed at

. In this example, replace _ cdecl with _ stdcall: Int _ stdcall add (int A, int B) { Return (A + B ); } Disassembly code of function call: ; Add (1, 2 ); Push 2; the parameter is pushed from right to left to 2 first Push 1; press 1 Call @ ILT + 10 (ADD) (0040100f); call function implementation Disassembly code for function implementation: ; Int _ stdcall add (int A, int B) Push EBP MoV EBP, ESP Sub ESP, 40 h Push EBX Push ESI Push

Reading Tips: 《Delphi Image ProcessingThe series focuses on efficiency. The general code is Pascal, and the core code is BaSm. The C ++ image processing series focuses on code clarity and readability, all using C ++ code. Make sure that the two items are consistent and can be compared with each other. The code in this article must include the imagedata. Pas unit in "Delphi Image Processing-data type and public process. Set the Key Color of the image to make the color of an image or within a ce

Label: Ar SP Div BS as Har relation ca nbspThree registers are involved: ECx, Al, EDI, and ZF bit and DF bit of the Mark register.Repne first checks whether ECx is 0, and if it is not 0, the loop is performed.Scasb is equivalent to SCAs byte ptr ds: [EDI] That is, sub Al, byte ptr ds: [EDI]. in addition, if the flag register df = 0, after scasb is executed,

methods) : 71a21af5 8bec mov EBP, esp // machine code to be hooked (2nd methods) : 71a21af7 83ec10 sub ESP, 00000010 : 71a21afa 56 push ESI : 71a21afb 57 push EDI : 71a21afc 33ff xor edi, EDI : 71a21afe 813d1c20a371931ca271 cmp dword ptr [71a3201c], 71a21c93 // machine code to be hooked (4th methods) : 71a21b08 0f84853d0000 je 71a25893 : 71a21b0e 8d45f8 Lea eax,

I hope you can come up with some ideas ~ Check whether there is any shell... Microsoft Visual C ++ 6.0, indicating no shell ~ Let's enter an account and password for trial run ~ The error message "incorrect registration name or registration code!" is displayed !" Okay. Let's load it with OD ~~ Search for asii, find the error message, and double-click it to go to the code ~ 00401d00/0f85 df1_00 jnz ultradic.00401de500401d06. | 68 01100000 push 100100401d0b. | 68 f4704300 push ultradic.004370f4; A

, because the parameter needs to be seen before createfont is called, to determine which call corresponds to the song name, use "BC" to clear the breakpoint and set the breakpoint in the last return statement of the kernel, then press "F5" until Winamp starts running and closes it."Load" again, press "F5", this time it stops on the Return Statement in the kernel, and then press "F10" to return to the code area where Winamp is located, and look up, you can see the following code:

"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"the CMPS directive is used to compare string values, and the CMPS directive has three formats: CMPSB, CMPSW, CMPSL. The implied source operand and target operand locations are stored in the ESI and EDI registers, and each time the cmps instruction is executed, the ESI and

). So the different compilers of different platforms have to be treated differently. The above is the last insufficient supplement. Here's a look at the array: test.c Example: Copy Code code as follows: void Hello1 () { int a[3]={1,2,3}; int b=a[1]; } void Hello2 () { int a[3]={1,2,3}; int b=* (a+1); } void Hello3 () { int a[3]={1,2,3}; int B=1[a]; Is that right? } If you look carefully, the difference between the three functions is that of the

.sin_addr.s_addr = 0;S_in3.sin_family = AF_INET;S_in3.sin_port = htons (port );S_in3.sin_addr.s_addr = d_ip;Bind (fd, (const struct sockaddr FAR *) s_in2, sizeof (struct sockaddr_in ));Printf ("nuke ip: % s port % d", inet_ntoa (s_in3.sin_addr), htons (s_in3.sin_port ));Memset (buff, NOPCODE, BUFFSIZE );Memcpy (buff, buff1, 37 );_ Asm {Mov ESI, ESPCmp ESI, ESP}_ Chkesp ();Chkespadd = _ chkesp;Temp = * chkespadd;If (temp = 0xe9 ){++ Chkespadd;// (Int *) I = (int *) * chkespadd;_ Asm {Mov

[Debugging environment]: WinXP, Ollydbg1.10C, WinHex, LordPE, UPXAngela, ImportREC ---------------------------------[Shelling Process ]: In fact, this article is just an Ollydbg version of UPX in "encryption and decryption" 2nd.It is very convenient for Ollydbg1.10C and UPXAngela to remove the upx dll.---------------------------------1. Get the relocated table RVA and OEP Code :--------------------------------------------------------------------------------003B8100 807C24 08 01 cmp byte ptr ss:

, dword ptr ds: [403236]; the first address of the user name is to esi00401627 8D3D 58324000 lea edi, dword ptr ds: [403258]; place the calculated User Name0040162D B9 0A000000 mov ecx, 0A; ecx = 1000401632 0FBE041E movsx eax, byte ptr ds: [ESI + EBX]; eax = the first character of the user name00401636 99 CDQ00401637 F7F9 idiv ecx; division operation, eax = 122/10 = 12 = ch, edx (remainder) 122% 10 = 200401639 33D3 xor edx, EBX; abnormal or operate ed

0x73727363FindProcess:Mov edi, espLea esi, dword ptr [ebx + 0x1fc]Push 0x4Pop ecxRepe cmpsbJecxz go2Mov ebx, dword ptr [ebx + 0xa0]Sub ebx, 0xa0Jmp FindProcessGo2:Pop edxMov edx, dword ptr [ebx + 0x50]FindThread:Movzx ecx, byte ptr [edx-0x86]Dec ecxJecxz go3Mov edx, dword ptr [edx]Jmp FindThreadGo3:Mov eax, dword ptr [ebx + 0x18]Mov ebp, espSub esp, 0x40Push edxMov 3, eax Push 0x10Pop ecxXor eax, eaxLea edi