从轻松试卷 v4.03 的破解看 r fl z 的妙用
日期：2003年6月8日 作者：PaulYoung 人气： 338
★从轻松试卷 v4.03 的破解看 r fl z 的妙用★
作者:PaulYoung
E-mail:paulyoung@yeah.net
软件简介：顾名思义啦。
URL:http://easypaper.yeah.net （最新版本是 v4.04 ，相信也差不了多少）
破解工具：SOFT-ICE V4.0.5
二○○一年三月二十四日凌晨
首先感谢★小牧童★大师的指点，才能使我能用 W32DASM V8.93 反汇编轻松试卷。虽然我是用动态跟踪破解的，但要写破解心得，首选还是 w32DASM 。
好了，首先自我介绍一番，我是名初学者，学了个把两个月破解吧，因此，汇编知识自然是鸟之又鸟的了，但熟能生巧嘛，而且我又是看雪破解论坛的常客，一来二往，真的学了不少东西。
最近我学了一招 r fl z ，功能大概跟 a 指令差不多吧，不过我觉得它按起来顺手多了。TRW2000 和 SOFT-ICE 均可使用，灵活运用，对破解能起到事半功倍的作用。
下面，我就以轻松试卷为例，看看 r fl z 有何妙处吧。
1、运行轻松试卷，在注册框的学校/单位、用户名、注册号处填写，随你便啦。
2、Ctrl+D 激活SOFT-ICE，下 BPX HMEMCPY。F5 退出，点击确定，被拦截。
3、下 BD * ，中断所有断点。
4、按12次 F12 （因为13次出错），开始看：
:004019A5 8D4DF8 lea ecx, dword ptr [ebp-08] //程序入口
:004019A8 51 push ecx
:004019A9 8BD7 mov edx, edi
:004019AB 8D45F4 lea eax, dword ptr [ebp-0C]
:004019AE E8D5721200 call 00528C88
:004019B3 FF431C inc [ebx+1C]
:004019B6 8D55F4 lea edx, dword ptr [ebp-0C]
:004019B9 58 pop eax
:004019BA E80D751200 call 00528ECC
:004019BF 50 push eax
:004019C0 FF4B1C dec [ebx+1C]
:004019C3 8D45F4 lea eax, dword ptr [ebp-0C]
:004019C6 BA02000000 mov edx, 00000002
:004019CB E818741200 call 00528DE8
:004019D0 FF4B1C dec [ebx+1C]
:004019D3 8D45F8 lea eax, dword ptr [ebp-08]
:004019D6 BA02000000 mov edx, 00000002
:004019DB E808741200 call 00528DE8 //学校名、单位名不能为空（我掉头就溜……）
:004019E0 59 pop ecx
:004019E1 84C9 test cl, cl
:004019E3 745F je 00401A44 //下 r fl z ,F5退出，可看到上面提示
:004019E5 66C743101400 mov [ebx+10], 0014
:004019EB 8D5701 lea edx, dword ptr [edi+01]
:004019EE 8D45F0 lea eax, dword ptr [ebp-10]
:004019F1 E892721200 call 00528C88
:004019F6 FF431C inc [ebx+1C]
:004019F9 8D45F0 lea eax, dword ptr [ebp-10]
:004019FC 33D2 xor edx, edx
:004019FE 8955EC mov dword ptr [ebp-14], edx
:00401A01 8D55EC lea edx, dword ptr [ebp-14]
:00401A04 FF431C inc [ebx+1C]
:00401A07 E8E8A90100 call 0041C3F4
:00401A0C 8D45EC lea eax, dword ptr [ebp-14]
:00401A0F 8B00 mov eax, dword ptr [eax]
:00401A11 E886420100 call 00415C9C
:00401A16 FF4B1C dec [ebx+1C]
:00401A19 8D45EC lea eax, dword ptr [ebp-14]
:00401A1C BA02000000 mov edx, 00000002
:00401A21 E8C2731200 call 00528DE8
:00401A26 FF4B1C dec [ebx+1C]
:00401A29 8D45F0 lea eax, dword ptr [ebp-10]
:00401A2C BA02000000 mov edx, 00000002
:00401A31 E8B2731200 call 00528DE8
:00401A36 8B0B mov ecx, dword ptr [ebx]
:00401A38 64890D00000000 mov dword ptr fs:[00000000], ecx
:00401A3F E972030000 jmp 00401DB6
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004019E3(C)
|
:00401A44 66C743102000 mov [ebx+10], 0020
:00401A4A 33C0 xor eax, eax
:00401A4C 8945E8 mov dword ptr [ebp-18], eax
:00401A4F 8D55E8 lea edx, dword ptr [ebp-18]
:00401A52 FF431C inc [ebx+1C]
:00401A55 8B86DC020000 mov eax, dword ptr [esi+000002DC]
:00401A5B E8F8A60D00 call 004DC158
:00401A60 8D55E8 lea edx, dword ptr [ebp-18]
:00401A63 52 push edx
:00401A64 8D5711 lea edx, dword ptr [edi+11]
:00401A67 8D45E4 lea eax, dword ptr [ebp-1C]
:00401A6A E819721200 call 00528C88
:00401A6F FF431C inc [ebx+1C]
:00401A72 8D55E4 lea edx, dword ptr [ebp-1C]
:00401A75 58 pop eax
:00401A76 E851741200 call 00528ECC
:00401A7B 50 push eax
:00401A7C FF4B1C dec [ebx+1C]
:00401A7F 8D45E4 lea eax, dword ptr [ebp-1C]
:00401A82 BA02000000 mov edx, 00000002
:00401A87 E85C731200 call 00528DE8
:00401A8C FF4B1C dec [ebx+1C]
:00401A8F 8D45E8 lea eax, dword ptr [ebp-18]
:00401A92 BA02000000 mov edx, 00000002
:00401A97 E84C731200 call 00528DE8 //用户名不能为空（傻子才会跟进去）
:00401A9C 59 pop ecx
:00401A9D 84C9 test cl, cl
:00401A9F 745F je 00401B00 //下 r fl z ,F5退出，可看到上面提示
:00401AA1 66C743102C00 mov [ebx+10], 002C
:00401AA7 8D5712 lea edx, dword ptr [edi+12]
:00401AAA 8D45E0 lea eax, dword ptr [ebp-20]
:00401AAD E8D6711200 call 00528C88
:00401AB2 FF431C inc [ebx+1C]
:00401AB5 8D45E0 lea eax, dword ptr [ebp-20]
:00401AB8 33D2 xor edx, edx
:00401ABA 8955DC mov dword ptr [ebp-24], edx
:00401ABD 8D55DC lea edx, dword ptr [ebp-24]
:00401AC0 FF431C inc [ebx+1C]
:00401AC3 E82CA90100 call 0041C3F4
:00401AC8 8D45DC lea eax, dword ptr [ebp-24]
:00401ACB 8B00 mov eax, dword ptr [eax]
:00401ACD E8CA410100 call 00415C9C
:00401AD2 FF4B1C dec [ebx+1C]
:00401AD5 8D45DC lea eax, dword ptr [ebp-24]
:00401AD8 BA02000000 mov edx, 00000002
:00401ADD E806731200 call 00528DE8
:00401AE2 FF4B1C dec [ebx+1C]
:00401AE5 8D45E0 lea eax, dword ptr [ebp-20]
:00401AE8 BA02000000 mov edx, 00000002
:00401AED E8F6721200 call 00528DE8
:00401AF2 8B0B mov ecx, dword ptr [ebx]
:00401AF4 64890D00000000 mov dword ptr fs:[00000000], ecx
:00401AFB E9B6020000 jmp 00401DB6
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00401A9F(C)
|
:00401B00 66C743103800 mov [ebx+10], 0038
:00401B06 33C0 xor eax, eax
:00401B08 8945D8 mov dword ptr [ebp-28], eax
:00401B0B 8D55D8 lea edx, dword ptr [ebp-28]
:00401B0E FF431C inc [ebx+1C]
:00401B11 8B86E0020000 mov eax, dword ptr [esi+000002E0]
:00401B17 E83CA60D00 call 004DC158
:00401B1C 8D55D8 lea edx, dword ptr [ebp-28]
:00401B1F 52 push edx
:00401B20 8D5724 lea edx, dword ptr [edi+24]
:00401B23 8D45D4 lea eax, dword ptr [ebp-2C]
:00401B26 E85D711200 call 00528C88
:00401B2B FF431C inc [ebx+1C]
:00401B2E 8D55D4 lea edx, dword ptr [ebp-2C]
:00401B31 58 pop eax
:00401B32 E895731200 call 00528ECC
:00401B37 50 push eax
:00401B38 FF4B1C dec [ebx+1C]
:00401B3B 8D45D4 lea eax, dword ptr [ebp-2C]
:00401B3E BA02000000 mov edx, 00000002
:00401B43 E8A0721200 call 00528DE8
:00401B48 FF4B1C dec [ebx+1C]
:00401B4B 8D45D8 lea eax, dword ptr [ebp-28]
:00401B4E BA02000000 mov edx, 00000002
:00401B53 E890721200 call 00528DE8 //注册号不能为空（快点走吧……）
:00401B58 59 pop ecx
:00401B59 84C9 test cl, cl
:00401B5B 745F je 00401BBC //下 r fl z ,F5退出，可看到上面提示
:00401B5D 66C743104400 mov [ebx+10], 0044
:00401B63 8D5725 lea edx, dword ptr [edi+25]
:00401B66 8D45D0 lea eax, dword ptr [ebp-30]
:00401B69 E81A711200 call 00528C88
:00401B6E FF431C inc [ebx+1C]
:00401B71 8D45D0 lea eax, dword ptr [ebp-30]
:00401B74 33D2 xor edx, edx
:00401B76 8955CC mov dword ptr [ebp-34], edx
:00401B79 8D55CC lea edx, dword ptr [ebp-34]
:00401B7C FF431C inc [ebx+1C]
:00401B7F E870A80100 call 0041C3F4
:00401B84 8D45CC lea eax, dword ptr [ebp-34]
:00401B87 8B00 mov eax, dword ptr [eax]
:00401B89 E80E410100 call 00415C9C
:00401B8E FF4B1C dec [ebx+1C]
:00401B91 8D45CC lea eax, dword ptr [ebp-34]
:00401B94 BA02000000 mov edx, 00000002
:00401B99 E84A721200 call 00528DE8
:00401B9E FF4B1C dec [ebx+1C]
:00401BA1 8D45D0 lea eax, dword ptr [ebp-30]
:00401BA4 BA02000000 mov edx, 00000002
:00401BA9 E83A721200 call 00528DE8
:00401BAE 8B0B mov ecx, dword ptr [ebx]
:00401BB0 64890D00000000 mov dword ptr fs:[00000000], ecx
:00401BB7 E9FA010000 jmp 00401DB6
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00401B5B(C)
|
:00401BBC 66C743105C00 mov [ebx+10], 005C
:00401BC2 33C0 xor eax, eax
:00401BC4 8945C4 mov dword ptr [ebp-3C], eax
:00401BC7 8D55C4 lea edx, dword ptr [ebp-3C]
:00401BCA FF431C inc [ebx+1C]
:00401BCD 8B86D8020000 mov eax, dword ptr [esi+000002D8]
:00401BD3 E880A50D00 call 004DC158
:00401BD8 8D55C4 lea edx, dword ptr [ebp-3C]
:00401BDB 33C0 xor eax, eax
:00401BDD 8B0A mov ecx, dword ptr [edx]
:00401BDF 8D55C8 lea edx, dword ptr [ebp-38]
:00401BE2 51 push ecx
:00401BE3 8945C8 mov dword ptr [ebp-38], eax
:00401BE6 FF431C inc [ebx+1C]
:00401BE9 8B86DC020000 mov eax, dword ptr [esi+000002DC]
:00401BEF E864A50D00 call 004DC158
:00401BF4 8D45C8 lea eax, dword ptr [ebp-38]
:00401BF7 8B00 mov eax, dword ptr [eax]
:00401BF9 33D2 xor edx, edx
:00401BFB 8955FC mov dword ptr [ebp-04], edx
:00401BFE 8D4DFC lea ecx, dword ptr [ebp-04]
:00401C01 FF431C inc [ebx+1C]
:00401C04 5A pop edx
:00401C05 E8762C0100 call 00414880
:00401C0A FF4B1C dec [ebx+1C]
:00401C0D 8D45C4 lea eax, dword ptr [ebp-3C]
:00401C10 BA02000000 mov edx, 00000002
:00401C15 E8CE711200 call 00528DE8
:00401C1A FF4B1C dec [ebx+1C]
:00401C1D 8D45C8 lea eax, dword ptr [ebp-38]
:00401C20 BA02000000 mov edx, 00000002
:00401C25 E8BE711200 call 00528DE8
:00401C2A 66C743105000 mov [ebx+10], 0050
:00401C30 66C743106800 mov [ebx+10], 0068
:00401C36 33C0 xor eax, eax
:00401C38 8945C0 mov dword ptr [ebp-40], eax
:00401C3B 8D55C0 lea edx, dword ptr [ebp-40]
:00401C3E FF431C inc [ebx+1C]
:00401C41 8B86E0020000 mov eax, dword ptr [esi+000002E0]
:00401C47 E80CA50D00 call 004DC158
:00401C4C 8D55C0 lea edx, dword ptr [ebp-40]
:00401C4F 8D45FC lea eax, dword ptr [ebp-04]
:00401C52 E875721200 call 00528ECC
:00401C57 50 push eax
:00401C58 FF4B1C dec [ebx+1C]
:00401C5B 8D45C0 lea eax, dword ptr [ebp-40]
:00401C5E BA02000000 mov edx, 00000002
:00401C63 E880711200 call 00528DE8 //恭喜你，你已成功注册（哈……哈……，快成功了！）
:00401C68 59 pop ecx
:00401C69 84C9 test cl, cl
:00401C6B 0F84C0000000 je 00401D31 //下 r fl z ,F5退出，可看到上面提示
:00401C71 66C743107400 mov [ebx+10], 0074
:00401C77 33C0 xor eax, eax
:00401C79 8945BC mov dword ptr [ebp-44], eax
:00401C7C 8D55BC lea edx, dword ptr [ebp-44]
:00401C7F FF431C inc [ebx+1C]
:00401C82 8B86D8020000 mov eax, dword ptr [esi+000002D8]
:00401C88 E8CBA40D00 call 004DC158
:00401C8D 8D55BC lea edx, dword ptr [ebp-44]
:00401C90 33C0 xor eax, eax
:00401C92 8B0A mov ecx, dword ptr [edx]
:00401C94 8D55B8 lea edx, dword ptr [ebp-48]
:00401C97 51 push ecx
:00401C98 8945B8 mov dword ptr [ebp-48], eax
:00401C9B FF431C inc [ebx+1C]
:00401C9E 8B86DC020000 mov eax, dword ptr [esi+000002DC]
:00401CA4 E8AFA40D00 call 004DC158
:00401CA9 8D55B8 lea edx, dword ptr [ebp-48]
:00401CAC 8B0A mov ecx, dword ptr [edx]
:00401CAE 51 push ecx
:00401CAF E818340100 call 004150CC
:00401CB4 83C408 add esp, 00000008
:00401CB7 FF4B1C dec [ebx+1C]
:00401CBA 8D45B8 lea eax, dword ptr [ebp-48]
:00401CBD BA02000000 mov edx, 00000002 //D EDX ,ALT+↑可看到注册码
:00401CC2 E821711200 call 00528DE8
:00401CC7 FF4B1C dec [ebx+1C]
:00401CCA 8D45BC lea eax, dword ptr [ebp-44]
:00401CCD BA02000000 mov edx, 00000002
:00401CD2 E811711200 call 00528DE8
:00401CD7 66C743108000 mov [ebx+10], 0080
:00401CDD 8D573D lea edx, dword ptr [edi+3D]
:00401CE0 8D45B4 lea eax, dword ptr [ebp-4C]
:00401CE3 E8A06F1200 call 00528C88
:00401CE8 FF431C inc [ebx+1C]
:00401CEB 8D45B4 lea eax, dword ptr [ebp-4C]
:00401CEE 33D2 xor edx, edx
:00401CF0 8955B0 mov dword ptr [ebp-50], edx
:00401CF3 8D55B0 lea edx, dword ptr [ebp-50]
:00401CF6 FF431C inc [ebx+1C]
:00401CF9 E8F6A60100 call 0041C3F4
:00401CFE 8D45B0 lea eax, dword ptr [ebp-50]
:00401D01 8B00 mov eax, dword ptr [eax]
:00401D03 E8B03E0100 call 00415BB8 //弹出“恭喜你，你已成功注册”窗口
**************************************************************************************************************
大家明白了吗？r fl z 并不会真的修改程序，只是起到模拟的作用，用它来验证某些 CALL 的功能非常好用，象我这种不太懂汇编的初学者来说，看到可疑的 CALL 与 jne,je 时，在jne/je 处下 r fl z ，再 F5 退出，看一看提示，就毋须象以前那样乱 D or ？一通，甚至 F8 跟入，徒劳无功了。如象 00401C63 处，在 00401C6B je 00401D31 处下 r fl z,弹出成功窗口，说明这个call有问题，虽然跟进这个 call 只能看到正确注册码的前三位，但很多软件还是用这种办法直接找到注册码或 F8 跟入再找到注册码的。
注：1、各位验证某个 call 时最好先 BD * 中断之前的所有断点，再在这个 call 设断，下 r fl z ，F5 退出后，如果发现不是验证注册码的 call ，按确定一般都可以被 TRW2000,SOFT-ICE 拦截，以便继续验证。（因为验证可能不止一次，如上例，以免重复作无谓的劳动。）
2、00401C6B je 00401D31 处必须下 r fl z，否则你是不可能来到00401CBD mov edx, 00000002的，切记，切记！