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From http://zerray.com/ Looking at the hooks in Win32 compilation, I was wondering how to write a whole-person program that changed the keyboard layout. Check the information and find that the underlying keyboard hook (wh_keyboard_ll) can be implemented. First, install and uninstall the HOOK: Installhook proc hins: DWORDInvoke setwindowshookex, wh_keyboard_ll, ADDR keyproc, hins, nullMoV hhook, eaxRETInstallhook endp Uninstallhook procInvoke unhookwindowshookex, hhookRETUninstallhook endp Like

: cannot resolve external symbol yyyyy". Second, the call syntax. Invoke obviously does not work, it will only press the parameter stack and then call it, but this is not the form of _ fastcall. it is also because it does not support _ fastcall, which makes assembly and other languages (such as C) mixed programming difficult once _ fastcall is involved. We all want to adopt some strategies to make MASM support the _ fastcall call method. In other words, it enables MASM to define and call functi

base2 class. The data is as follows:---- 00 00 00 00 04 00 00 08 00 00 00Int I;Int J; The following is the assembly code of the F (derived * pderived) function. 29: void F (derived * pderived)30 :{0040c230 push EBP0040c231 mov EBP, ESP0040c233 sub ESP, 60 h0040c236 push EBX0040c237 push ESI0040c238 push EDI0040c239 Lea EDI, [ebp-60h]0040c23c mov ECx, 18 h0040c241 mov eax, 0 cccccccch0040c246 rep STOs dword ptr [EDI]31: mostbase1 * pbase1 = pderived;0040c248 cmp dword ptr [EBP + 8], 0 [1]0040c2

; all reference text strings and click: Of course, it is more convenient to use the above super string reference + plug-in. However, our goal is to be familiar with some OllyDBG operations. I will try to use the built-in functions of OllyDBG with less plug-ins. Now, in another dialog box, right-click it, select the "Search Text" menu item, and enter "Wrong Serial, try again !" The start WORD "Wrong" (note that the search content is case-sensitive) to find one: Right-click the string we found,

; immediate count. A dialog box is displayed: Double-click the two addresses marked above, and we will go to the corresponding location: 00366f79 |. Ba 8c0000400 mov edX, crackme3.0044450c; ASCII "Wrong serial, try again! "00366f7e |. A1 442c4400 mov eax, dword ptr ds: [442c44]00366f83 |. 8b00 mov eax, dword ptr ds: [eax]00366f85 |. E8 dec0ffff call crackme3.0043d06800366f8a |. EB 18 JMP short crackme3.0020.fa4000000f8c |> 6a 00 push 00010000f8e

========================================================== ========================================================== ====004991B1 call rtcRandomNext004991B7 fmul dbl_403920004991BD call _ vbaFpI4004991C3 mov dword_4D1030, eax; random number R1004991C8 lea ecx, [ebp-98h]004991CE call _ vbaFreeVar004991D4 mov dword ptr [ebp-4], 0Eh004991DB mov dword ptr [ebp-90h], 80020004 h004991E5 mov dword ptr [ebp-98h], 0Ah004991EF lea ecx, [ebp-98h]004991F5 push ecx004991F6 call rtcRandomize004991FC lea ecx,

Codefunction Strtohex (Const str:ansistring): ansistring;AsmPush EBXPush ESIPush EDITest Eax,eaxJZ @ @ExitMOV Esi,edx//Save the EdX value, the address used to generate the new stringMOV edi,eax//Save original stringMOV edx,[eax-4]//Get string lengthTest Edx,edx//Check length

Virus program source code instance analysis-CIH virus [3] code, you need to refer to the jmp ExitRing0Init; exit Ring0 level 　　 ; Size of the merged code CodeSizeOfMergeVirusCodeSection = offset $ 　　 ; New IFSMgr_InstallFileSystemApiHook function call InstallFileSystemApiHook: Push ebx 　　 Call @ 4 　　 @ 4: Pop ebx; get the offset address of the current command Add ebx, FileSystemApiHook-@ 4; the offset difference is equal to the offset of FileSystemApiHook. 　　 Push ebx Int 20 h; call Vxd to remov

programming software is basically an English kernel. What is the English pass or pass? The four letters PASS! Right-click the string and choose "drop-down menu"> "Search"> "all reference text strings". Find the strings below: 004E7F29 ASCII "newunit"004E7F6B mov edx, 123.004E8270 ASCII "book. mdb" → this file is generated in the directory after being decompressed!004E8045 PUSH 123.004E82F4 ASCII "book. mdb"004E809E PUSH 123.004E8208 ASCII ". mdb"004E

Protection Mechanism [Statement]I write articles mainly for communication, and hope that you can maintain the integrity of the article during reprinting. [Preface]This time I focused on the protection mechanism and did not write any shell removal method. In fact, I have misled many kind audiences. The most important thing to know about a shell software is its protection mechanism, which I learned later. The following describes some protection mechanisms. This is only for everyone and me to lear

references-> immediate count. A dialog box is displayed: Double-click the two addresses marked above, and we will go to the corresponding location: 00366f79 |. Ba 8c0000400 mov edX, crackme3.0044450c; ASCII "Wrong serial, try again! "00366f7e |. A1 442c4400 mov eax, dword ptr ds: [442c44]00366f83 |. 8b00 mov eax, dword ptr ds: [eax]00366f85 |. E8 dec0ffff call crackme3.0043d06800366f8a |. EB 18 JMP short crackme3.0020.fa4000000f8c |> 6a 00 push 00

class address instead of the Child class address? This involves implementing restrictions within compilation and a comprehensive understanding of a system problem. It is difficult to find the answer by analyzing the phenomenon. We call it again through pointers.C150 * PT = OBJ;Pt-> Foo ();The Assembly command corresponding to the second line of code is:01 00423f8b mov eax, dword ptr [EBP + fffff73ch]02 00423f91 mov ECx, dword ptr [eax]03 00423f93 mov edX