jmp boston

{ 0x1093a10 ebfe JMP main.deadloop(SB) 0x1093a12 cc INT $0x3 0x1093a13 cc INT $0x3 0x1093a14 cc INT $0x3 0x1093a15 cc INT $0x3 ... ... 0x1093a1f cc INT $0x3 We see that the call to add in Deadloop also disappears. This is obviously the result of Go c

::onbnclickedsub () {ASSERT (hinst); mysub = (m_sub):: GetProcAddress (hinst, "sub"); int a = n, b = 6;int Res = MySub (A, b); CString Str;str. Format (_t ("a-b=%d"), res); AfxMessageBox (str);} void Cmathtestdlg::onbnclickedmod () {ASSERT (hinst); mymod = (m_mod):: GetProcAddress (hinst, "mod"); int a = n, b = 6;int Res = Mymod (A, b); CString Str;str. Format (_t ("A for remainder b=%d"), res); AfxMessageBox (str);}Second, Mfc-dll1. Mfc-dll will call code in InitInstance when loading, exit loa

the specified memory address, instead it must use instructions that change the instruction pointer to change the next instruction of the pre-access cache, which is called the branch instruction. The branch instruction can change the value of the EIP register, either unconditionally or by conditional change. when a program encounters a jump, call, or interrupt, the instruction pointer automatically jumps to another location. Jump Instructions The jump instruction uses a single ins

table entry 0000:0634-Dec CX. # entries left 0000:0635 jz short Loc_tabok, all entries look OK 0000:0637 2C CMP [Si],ch; Other entries = 0? 0000:0639 F6 JE Loc_nextrpe; Yes, this one is OK 0000:063b Loc_bad:; Found a invalid entry: ; A). From 0624:boot ID!=0 and!=80h ; B. From 0639:multi entries with id=80h 0000:063b. is 0710 mov si,offset msg1+1; ' Invalid partition ' 0000:063e loc_halt:; show msg then halt 0000:063e 4E Dec si 0000:063f loc_msg:; xref 064B, 06BA 0000:063f AC LODSB

ds:[40574c] 004032EF 8903 MOV DWORD PTR ds:[ebx],eax 004032F1 33c0 XOR Eax,eax 004032F3 PUSH EBP 004032F4 50334000 PUSH ntgodmod.00403350 004032f9 64:ff30 PUSH DWORD PTR Fs:[eax] 004032FC 64:8920 MOV DWORD PTR fs:[eax],esp 004032FF 8b03 MOV eax,dword PTR ds:[ebx]//msv1_0.dll base site 00403301 8038 8B CMP BYTE PTR ds:[eax],8b 00403304 1C jnz Short ntgodmod.00403322 00403306 8b03 MOV eax,dword PTR DS:[EBX] 00403308 Inc. EAX 00403309 8038 4D CMP BYTE PTR ds:[eax],4d 0040330C JNZ Short ntgodmod.00

entering the sub-call (used for the stack balance of the sub-call), after exiting, the original ebp value will be restored according to * pop EBP. Taking this sentence as a breakthrough means that as long as we can break through the "top-Layer Program", we can observe the ESP value of EBP when the shell is between JMP and OEP. 3. Practice Let's take a look at the pespin1.1 shell. In the pespin1.0 shell, we can easily find the place of stolen code usi

enlighten us! [Cracking tool]: Modified TRW2000 doll version, Ollydbg1.09, PEiD, LordPE, ImportREC, W32Dasm 9.0 platinum Edition ---------------------------------[Process ]:This is the first easy-to-use language written in my opinion. ^ O ^ all the operations and comparisons are completed in the easy-to-run library. This version was obtained a long time ago and has been available for trial recently.---------------------------------I. shelling Chaoshi.exe is the ASPack 2.12 shell, which can be d

pixel. --------------------------------------------------------------------------- Example: [cpp] # This program draws a straight line in graphics mode. #2012-12-24 # guzhoudiaoke@126.com. section. text. global _ start. code16 _ start: jmp main clear_screen: # clear screen function movb $0x06, % ah # function no. 0x06 movb $0, % al # Roll up all rows, movb $0, % ch # movb $0 in the upper left corner of the screen, % ch # movb $24 in the upper left co

unconditional transfer commands, JMP, and so on, that can be used to judge the condition of if, for, and while in a high-level language. Some directives that change status flags, such as CMP, are usually used before these instructions.Among them, what can be learned in this experiment is. The student variable is defined in the data segment and contains 100-byte elements. This is the same as the concept of arrays in high-level languages. In fact, reca

the size of the first virus code block Lea EAX, [ebp+edi-04h] mov [EAX], ebx 　　 ; Set the first block of viruses Push ebx; The size of the first block of the virus code 　　 Add edx, EDI push edx; file pointer Lea EDI, (myvirusstart-@9) [esi] Push EDI; buffer address 　　 Modify the entrance of the addressofentrypoint for the virus entrance MOV (NEWADDRESSOFENTRYPOINT-@9) [esi], edx; Save a new program entry (virus text) 　　 ; Set Initial data Lea edx, [esi-sizeofscetiontable]; EdX first min

al, AL100742C1> AE SCAS BYTE PTR ES: [EDI]100742C2. ^ 75 fd jnz short 1291SS. 100742C1100742C4. 4F DEC EDI100742C5. 29CF sub edi, ECX100742C7. 87F9 xchg ecx, EDI100742C9. 8B43 3C mov eax, dword ptr ds: [EBX + 3C]100742CC. 8B7403 78 mov esi, dword ptr ds: [EBX + EAX + 78]100742D0. 8D741E 18 lea esi, dword ptr ds: [ESI + EBX + 18]100742D4. ad lods dword ptr ds: [ESI]100742D5. 92 xchg eax, EDX100742D6. ad lods dword ptr ds: [ESI]100742D7. 50 PUSH EAX100742D8. ad lods dword ptr ds: [ESI]100742D9. 9

Shelling software: MultiTranse 4.1.1: Http://www.tialsoft.com/download/Software Description: MultiTranse is a software that employs free online resources to translate to/from 13 different ages.Shelling method: Execryptor 2.xAuthor's statement: I am only interested. If you make mistakes, please correct them. 1. Use HidaOD to hide the OLLYDBG_Execryptor (for debugging the OD of Execryptor, see the link below). After stopping the system breakpoint, run the BypassAnti script and there will be some e

Ad removal principle: Here, of course, the middlebeer method MoveWindow (hwndChild, true) is used );The advertisement bar class is TGradualPanel. Ad Analysis1. peidcheck main program: thunder.exe, no shell, Borland Delphi 6.0-7.0 compilation. 2. Use ollydbg to load Thunder.exe and then run the breakpoint bpx ShowWindow 00495474. 50 push eax00495475. 8B45 FC mov eax, dword ptr ss: [ebp-4]00495478. E8 F38DFEFF call Thunder1.0047E2700049547D. 50 push eax; | hWnd is disconnected under this0049547E.

Instructions:Push ebpMov ebp, espInc ecxPush edxNopPop edxDec ecxPop ebpInc ecxOriginal jmp entry 1. Disguised vc The entry code of the VC ++ program:PUSH EBPMov ebp, ESPPUSH-1Push 415448 -\___PUSH 4021A8-/in this Code, operations similar to this can be left blankMov eax, dword ptr fs: [0]PUSH EAXMov dword ptr fs: [0], ESPAdd esp,-6CPUSH EBXPUSH ESIPUSH EDIAdd byte ptr ds: [EAX], AL/this command can be left blank!