edx vs udemy

methods, here for the moment, the following is mainly to see how to locate these vtable. .text:10002A52　mov　edx,　[ecx+4] .text:10002A55　mov　eax,　[ebp+ICorJitInfo] .text:10002A58　mov　ecx,　[eax+4] .text:10002A5B　mov　eax,　[ecx+4] .text:10002A5E　mov　ecx,　[ebp+ICorJitInfo] .text:10002A61　lea　eax,　[ecx+eax+4] .text:10002A65　mov　ecx,　[ebp+ICorJitInfo] .text:10002A68　mov　edx,　[ecx+

on one side.An IDA Pro disassembly Hkdoordll.dll can find calls to the following functions: File Rename: . data:1000c618 Lea ECX, [Esp+438h+filename]. data:1000c61f Lea edx, [esp+438h+var_324]. data:1000c626 push ECX. data:1000c627 Push EdX. data:1000c628 Call Rename Copy file: .data:1000c66f lea edx, [esp+440h+var_32c] .data:1000c676 push 0 ; Bfailifexis

Image_import_descriptor structureIf there is a MessageBoxA function, the EAX contains the cell address (which holds the function entry); otherwise eax=0checkfunction procAssume Esi:ptr Image_import_descriptorMOV Edx,[esi]. Firstthunk to () the address of a cell (that holds a function entry)MOV Ebx,[esi]. OriginalfirstthunkAdd ebx,ecx ebx point to Image_thunk_data structure in memory blockCheck1:MOV EAX,[EBX]or Eax,eaxJZ Check3Add eax,ecx; eax point t

CPU provides a lot of registers, but in the process and function of Delphi, only EAX ECX EDX three registers are free to use; If you change the other registers, restore them before the procedure and function are finished. Remember the previous learning Delphi process and function The default calling convention is register, the first three parameters are passed through registers, and other parameters are stored and stack. The three registers it refe

reaches 00401051, observe the function stack as follows: We can see that the return address will be overwritten at the 13 offset of the TXT text. Step 3: (1) Compile the program code for the general pop-up calculator and extract the shellcode # Include "stdio. h "int main () {unsigned int KerdllAddress; // defines the address unsigned int GetProcessAddr of kernel32; // defines the function address unsigned int loadlibrarya; unsigned int WinExecAddress; // The address of the command executio

Dump of worker er code for function system_call: 0xc0103e04 : Push % eax 0xc0103e05 : Cld 0xc0103e06 : Push % es 0xc0103e07 : Push % ds 0xc0103e08 : Push % eax 0xc0103e09 : Push % ebp 0xc0103e0a : Push % edi 0xc0103e0b : Push % esi 0xc0103e0c : Push % edx

[Article Title]: cracking of a CrackMe that requires a run trace[Author]: bxm[Author mailbox]: bxm78@163.com[Protection method]: name, serial[Language]: Borland C ++[Tools]: peid, od[Operating platform]: winxp[Author's statement]: I am only interested and have no other purpose. For errors, please enlighten us!--------------------------------------------------------------------------------[Detailed process]Use peid for Shell check, no shell, run, input name and serial, No prompts, load with OD, s

]; |004012C8 |. 50 push eax; | Buffer004012C9 |. 68 EE030000 push 3EE; | ControlID = 3EE (1006 .)004012CE |. FF35 0C304000 push dword ptr [40300C]; | hWnd = 00190644 (B2C _2k5, class = DLGCLASS)004012D4 |. E8 15010000 call 004012D9 |. 83F8 08 cmp eax, 8; number of registration codes compared with 8004012DC |. 0F85 A2000000 jnz 00401384; The redirect fails if the registration code is not equal to 8 digits.We can learn from this:The registration name must be greater than 5 CharactersThe registrati

have any impact on the debugging program) after running, we press ALT + E or the E icon on the menu bar (this is to display the current module) after opening the program, we can select the process EXE of the program. Double-click 6 After double-clicking the program, I came to the Disassembly window and again looked for the ASCII character seek (after the program ran, the module checked the word seek to deal with the general shelling program very effective, you can try it yourself) this time we

, 2 stacks. Analysis Parameters:Move Ecx,14call 0069f7e0...mov Ebx,eax...mov eax,[ebx+98]mov ecx,008324e0push eaxpush 1FI thought that just using one of the above functions is enough, the front is initialized, and the result is--just add a nuke option, not ready, or countdown ...So the above a call 0069ccf0 is also necessary (altogether there are 4, one is the output debugging information, one is the above call 0069F7E0 get a parameter value, an increase option, not it is who? ), since the effec

; mov edx, Exchange; mov eax, comperand; Lock Cmpxchg [ecx], edx; }}ExchangeLong __stdcall Exchange (longvolatile* Target,long Value) { __asm { mov ecx, Target; mov edx, Value;label: lock Cmpxchg [ecx], edx; Add jnz short label; }}Self-reductionLon

pattern.8. Questions about how to track the program : Beginners often do not know how to follow the program when they start to learn how to track the code, how to find a place to compare the registry, when faced with a long heap of code when it seems overwhelmed. Usually the software inside the program using a subroutine (that is, call ********) to verify that we entered the correct registration code, for the registration code explicit existence of the program, generally will enter the registra

; End Aplib, data is solved in memory of 404120 applications004041c7 B9 FC070000 MOV ECX,7FC004041CC 8b1c08 MOV ebx,dword PTR DS:[EAX+ECX]004041CF 8999 00104000 MOV DWORD PTR ds:[ecx+401000],ebx004041d5 ^ E2 F5 loopd Short ahpack.004041cc; 404120 of the requested memory contains the extracted data, copy it to the Oep place004041d7-NOP; The following start to repair the IAT, hehe, 9090 will not be deliberately to a split it004041d8-NOP004041d9 BA 00004000 MOV

Software cracking-questions about how to track programs: When beginners start to learn decryption, they often don't know how to track the program, how to find a place where the registration code is compared, and how to feel overwhelmed when facing a long pile of program code. Generally, software programs use a sub-program called CALL ********* to verify whether the entered registration code is correct or not. For programs with an explicit registration code, generally, the entered registration co

] // Jump to ECx + 4 vtblreal1: F2 () Address // Void * ptemp = (void *) ( vtblreal1: F2 ); If (pvtbl! = NULL) 0096173b cmp dword ptr [ebp-14h], 0 0096173f je wmain + 128 H (9617b8h) { Pvtbl-> F1 (); 00961741 mov eax, dword ptr [ebp-14h] 00961744 mov edX, dword ptr [eax] 00961746 mov ESI, ESP 00961748 mov ECx, dword ptr [ebp-14h] 0096174b mov eax, dword ptr [edX] // The first fu