160个crackme 008 Andrénalin.1

Posted 2020-07-22

打开，伪码检验:

弹出框不知道是哪国的语言...怪怪的

peid:

VB的，无壳，看起来应该很简单
OD，查找字符串:

看到了Successful字符串，应该是一个成功，一个失败的注册吧，ok，双机进入它的领空:
大概看了一下代码，额，很简单:

00401D73   .  51            push ecx;用户输入的key
00401D74   .  68 541A4000   push Andréna.00401A54                          ;  UNICODE "SynTaX 2oo1"
00401D79   .  FF15 08314000 call dword ptr ds:[<&MSVBVM50.__vbaStrCmp>]    ;  msvbvm50.__vbaStrCmp
00401D7F   .  8BF8          mov edi,eax
00401D81   .  8D4D D8       lea ecx,dword ptr ss:[ebp-0x28]
00401D84   .  F7DF          neg edi
00401D86   .  1BFF          sbb edi,edi
00401D88   .  47            inc edi
00401D89   .  F7DF          neg edi
00401D8B   .  FF15 5C314000 call dword ptr ds:[<&MSVBVM50.__vbaFreeStr>]   ;  msvbvm50.__vbaFreeStr
00401D91   .  8D4D D4       lea ecx,dword ptr ss:[ebp-0x2C]
00401D94   .  FF15 60314000 call dword ptr ds:[<&MSVBVM50.__vbaFreeObj>]   ;  msvbvm50.__vbaFreeObj
00401D9A   .  66:3BFE       cmp di,si
00401D9D   .  0F84 A0000000 je Andréna.00401E43                            ;  ;跳转到错误代码的位置

Vbastrcmp比较输入的key和字符串SynTaX 2oo1，好吧，正确的key应该是它

没什么可说的...