关于脱壳的一些笔记

最新推荐文章于 2023-12-25 14:52:27 发布

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本文详细解析了VB、Delphi、C++、VC++ 和MASM(汇编)等编程语言的入口点，包括具体指令和操作，旨在帮助开发者深入理解不同语言的执行流程。

常见语言的入口点：

VB：

004012D4 >  68 54474000     push QQ个性网.00404754
004012D9    E8 F0FFFFFF     call <jmp.&MSVBVM60.#100>
004012DE    0000            add byte ptr ds:[eax],al
004012E0    0000            add byte ptr ds:[eax],al
004012E2    0000            add byte ptr ds:[eax],al
004012E4    3000            xor byte ptr ds:[eax],al
004012E6    0000            add byte ptr ds:[eax],al
004012E8    48              dec eax

delphi:

004A5C54 >  55              push ebp
004A5C55    8BEC            mov ebp,esp
004A5C57    83C4 F0         add esp,-10
004A5C5A    B8 EC594A00     mov eax,openpro.004A59EC

BC++:

00401678 > /EB 10           jmp short btengine.0040168A
0040167A   |66:623A         bound di,dword ptr ds:[edx]
0040167D   |43              inc ebx
0040167E   |2B2B            sub ebp,dword ptr ds:[ebx]
00401680   |48              dec eax
00401681   |4F              dec edi
00401682   |4F              dec edi
00401683   |4B              dec ebx
00401684   |90              nop
00401685  -|E9 98005400     jmp 00941722
0040168A   \A1 8B005400     mov eax,dword ptr ds:[54008B]
0040168F    C1E0 02         shl eax,2
00401692    A3 8F005400     mov dword ptr ds:[54008F],eax
00401697    52              push edx
00401698    6A 00           push 0
0040169A    E8 99D01300     call <jmp.&KERNEL32.GetModuleHandleA>
0040169F    8BD0            mov edx,eax

VC++:

0040A41E >  55              push ebp
0040A41F    8BEC            mov ebp,esp
0040A421    6A FF           push -1
0040A423    68 C8CB4000     push 跑跑排行.0040CBC8
0040A428    68 A4A54000     push <jmp.&MSVCRT._except_handler3>
0040A42D    64:A1 00000000  mov eax,dword ptr fs:[0]
0040A433    50              push eax
0040A434    64:8925 0000000>mov dword ptr fs:[0],esp
0040A43B    83EC 68         sub esp,68
0040A43E    53              push ebx
0040A43F    56              push esi
0040A440    57              push edi

MASM(汇编):

004035C9 >  6A 00           push 0
004035CB    E8 A20A0000     call <jmp.&kernel32.GetModuleHandleA>
004035D0    A3 5B704000     mov dword ptr ds:[40705B],eax
004035D5    68 80000000     push 80
004035DA    68 2C754000     push 11.0040752C
004035DF    FF35 5B704000   push dword ptr ds:[40705B]
004035E5    E8 820A0000     call <jmp.&kernel32.GetModuleFileNameA>
004035EA    E8 87070000     call 11.00403D76
004035EF    6A 00           push 0
004035F1    68 0B364000     push 11.0040360B
004035F6    6A 00           push 0
004035F8    6A 64           push 64
004035FA    FF35 5B704000   push dword ptr ds:[40705B]