加密方式：注册码
使用工具：TRW2000;W32Dasm 10.0
作者申明：纯技术交流，无任何商业目的,转贴请保持完整。
/////////////////////////////////////////////////////////////////////////////////////////////
开始TRW2000加载输入注册码，下BPX HMEMCPY，点“注册”，程序被拦断，
BC *，PMODULE后停在这里
:004419B0 3BC3 cmp eax, ebx
:004419B2 DBE2 fclex
:004419B4 7D12 jge 004419C8
:004419B6 68A0000000 push 000000A0
:004419BB 68FCE24000 push 0040E2FC
:004419C0 57 push edi
:004419C1 50 push eax
F10跟踪 经过********!!!!!!%%%%%%（好累！）到PART1
/////////////////////////////////////PART1////////////////////////////////////////////////
:00441C6C FF1510114000 Call dword ptr [00401110]
:00441C72 8BF8 mov edi, eax
:00441C74 8D55E4 lea edx, dword ptr [ebp-1C]
:00441C77 F7DF neg edi
:00441C79 1BFF sbb edi, edi
:00441C7B 52 push edx
:00441C7C 47 inc edi
:00441C7D F7DF neg edi
:00441C7F E86C220000 call 00443EF0 /关键CALL 跟进 见 PART2
:00441C84 6648 dec ax
:00441C86 8D4DE4 lea ecx, dword ptr [ebp-1C]
:00441C89 66F7D8 neg ax
:00441C8C 1BC0 sbb eax, eax
:00441C8E 40 inc eax
:00441C8F F7D8 neg eax
:00441C91 0BF8 or edi, eax
:00441C93 8D45E0 lea eax, dword ptr [ebp-20]
:00441C96 50 push eax
:00441C97 51 push ecx
:00441C98 6A02 push 00000002
/////////////////////////////////////PART2////////////////////////////////////////////////
:00443EF0 55 push ebp
:00443EF1 8BEC mov ebp, esp
:00443EF3 83EC08 sub esp, 00000008
:00443EF6 68662A4000 push 00402A66
:00443EFB 64A100000000 mov eax, dword ptr fs:[00000000]
:00443F01 50 push eax
:00443F02 64892500000000 mov dword ptr fs:[00000000], esp
:00443F09 81ECB4000000 sub esp, 000000B4
:00443F0F 53 push ebx
:00443F10 56 push esi
:00443F11 57 push edi
:00443F12 8965F8 mov dword ptr [ebp-08], esp
:00443F15 C745FC80254000 mov [ebp-04], 00402580
:00443F1C 8B4508 mov eax, dword ptr [ebp+08]
:00443F1F 33F6 xor esi, esi
:00443F21 8975E0 mov dword ptr [ebp-20], esi
:00443F24 8975DC mov dword ptr [ebp-24], esi
:00443F27 8B08 mov ecx, dword ptr [eax]
:00443F29 8975D0 mov dword ptr [ebp-30], esi
:00443F2C 51 push ecx
:00443F2D 8975CC mov dword ptr [ebp-34], esi
:00443F30 8975C8 mov dword ptr [ebp-38], esi
:00443F33 8975C4 mov dword ptr [ebp-3C], esi
:00443F36 8975C0 mov dword ptr [ebp-40], esi
:00443F39 8975B0 mov dword ptr [ebp-50], esi
:00443F3C 8975A0 mov dword ptr [ebp-60], esi
:00443F3F 897590 mov dword ptr [ebp-70], esi
:00443F42 897580 mov dword ptr [ebp-80], esi
:00443F45 89B57CFFFFFF mov dword ptr [ebp+FFFFFF7C], esi
:00443F4B 89B578FFFFFF mov dword ptr [ebp+FFFFFF78], esi
:00443F51 89B564FFFFFF mov dword ptr [ebp+FFFFFF64], esi
:00443F57 89B554FFFFFF mov dword ptr [ebp+FFFFFF54], esi
* Reference To: MSVBVM60.__vbaLenBstr, Ord:0000h
|
:00443F5D FF1528104000 Call dword ptr [00401028]
:00443F63 83F80E cmp eax, 0000000E /eax返回注册码位数，判断是否为14位，否则失败
:00443F66 740E je 00443F76
:00443F68 8975D8 mov dword ptr [ebp-28], esi
:00443F6B 6861424400 push 00444261
:00443F70 9B wait
:00443F71 E9C8020000 jmp 0044423E
.................
............
:00443FCC 85C0 test eax, eax /循环求前12位注册码中的数字和
:00443FCE 0F848D000000 je 00444061
:00443FD4 8D55B0 lea edx, dword ptr [ebp-50]
:00443FD7 8D45E0 lea eax, dword ptr [ebp-20]
:00443FDA 52 push edx
:00443FDB 50 push eax
:00443FDC C745B801000000 mov [ebp-48], 00000001
:00443FE3 C745B002000000 mov [ebp-50], 00000002
* Reference To: MSVBVM60.__vbaI4Var, Ord:0000h
|
:00443FEA FF1520124000 Call dword ptr [00401220]
:00443FF0 8B4D08 mov ecx, dword ptr [ebp+08]
:00443FF3 50 push eax
:00443FF4 8B11 mov edx, dword ptr [ecx]
:00443FF6 52 push edx
* Reference To: MSVBVM60.rtcMidCharBstr, Ord:0277h
|
:00443FF7 FF15E8104000 Call dword ptr [004010E8]
:00443FFD 8BD0 mov edx, eax
:00443FFF 8D4DD0 lea ecx, dword ptr [ebp-30]
:00444002 FFD7 call edi
:00444004 50 push eax
* Reference To: MSVBVM60.rtcR8ValFromBstr, Ord:0245h
|
:00444005 FF15A4124000 Call dword ptr [004012A4]
:0044400B 0FBF45DC movsx eax, word ptr [ebp-24]
:0044400F 898544FFFFFF mov dword ptr [ebp+FFFFFF44], eax
:00444015 DB8544FFFFFF fild dword ptr [ebp+FFFFFF44]
:0044401B DD9D3CFFFFFF fstp qword ptr [ebp+FFFFFF3C]
:00444021 DC853CFFFFFF fadd qword ptr [ebp+FFFFFF3C]
:00444027 DFE0 fstsw ax
:00444029 A80D test al, 0D
:0044402B 0F8547020000 jne 00444278
:00444031 FFD6 call esi
:00444033 8D4DD0 lea ecx, dword ptr [ebp-30]
:00444036 8945DC mov dword ptr [ebp-24], eax /存注册码中数字的累加和
* Reference To: MSVBVM60.__vbaFreeStr, Ord:0000h
|
:00444039 FF15A0124000 Call dword ptr [004012A0]
:0044403F 8D4DB0 lea ecx, dword ptr [ebp-50]
:00444042 FFD3 call ebx
:00444044 8D8D54FFFFFF lea ecx, dword ptr [ebp+FFFFFF54]
:0044404A 8D9564FFFFFF lea edx, dword ptr [ebp+FFFFFF64]
:00444050 51 push ecx
:00444051 8D45E0 lea eax, dword ptr [ebp-20]
:00444054 52 push edx
:00444055 50 push eax
* Reference To: MSVBVM60.__vbaVarForNext, Ord:0000h
|
:00444056 FF1594124000 Call dword ptr [00401294]
:0044405C E96BFFFFFF jmp 00443FCC
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00443FCE(C)
|
:00444061 8B0D34D04400 mov ecx, dword ptr [0044D034] /取机器码后两位
:00444067 6A02 push 00000002
:00444069 51 push ecx
* Reference To: MSVBVM60.rtcRightCharBstr, Ord:026Ah
|
:0044406A FF1570124000 Call dword ptr [00401270]
:00444070 8BD0 mov edx, eax
:00444072 8D4DD0 lea ecx, dword ptr [ebp-30]
:00444075 FFD7 call edi
:00444077 50 push eax
* Reference To: MSVBVM60.rtcR8ValFromBstr, Ord:0245h
|
:00444078 FF15A4124000 Call dword ptr [004012A4]
:0044407E FFD6 call esi
:00444080 8D4DD0 lea ecx, dword ptr [ebp-30]
:00444083 8BF0 mov esi, eax /机器码后两位字符串转成数字后存入esi，以下为生成机器码后两位变码
* Reference To: MSVBVM60.__vbaFreeStr, Ord:0000h
|
:00444085 FF15A0124000 Call dword ptr [004012A0]
:0044408B 6683FE0A cmp si, 000A /比较数字是否大于等于10
:0044408F 7D0A jge 0044409B
:00444091 6683C60A add si, 000A /小于10则该数字加10
:00444095 0F80E2010000 jo 0044427D
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0044408F(C)
|
:0044409B 668BC6 mov ax, si
:0044409E 66B90A00 mov cx, 000A
:004440A2 6699 cwd
:004440A4 66F7F9 idiv cx /数字除10并判断余数
:004440A7 6685D2 test dx, dx
:004440AA 750A jne 004440B6
:004440AC 6683C609 add si, 0009 /除尽则原数字加9再乘3；除不尽原数字乘3
:004440B0 0F80C7010000 jo 0044427D
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004440AA(C)
|
:004440B6 666BF603 imul si, 0003
:004440BA 0F80BD010000 jo 0044427D
:004440C0 660375DC add si, word ptr [ebp-24] /得到的机器码变码加注册码前12位中数字的和。
:004440C4 8D45A0 lea eax, dword ptr [ebp-60]
:004440C7 8D4DB0 lea ecx, dword ptr [ebp-50]
:004440CA 8D55DC lea edx, dword ptr [ebp-24]
:004440CD 50 push eax
:004440CE 51 push ecx
:004440CF 0F80A8010000 jo 0044427D
:004440D5 8975DC mov dword ptr [ebp-24], esi /结果存入 [ebp-24]
:004440D8 8955A8 mov dword ptr [ebp-58], edx
:004440DB C745A002400000 mov [ebp-60], 00004002
* Reference To: MSVBVM60.rtcVarStrFromVar, Ord:0265h
|
:004440E2 FF153C124000 Call dword ptr [0040123C]
:004440E8 8D55B0 lea edx, dword ptr [ebp-50]
:004440EB 8D45D0 lea eax, dword ptr [ebp-30]
:004440EE 52 push edx
:004440EF 50 push eax
* Reference To: MSVBVM60.__vbaStrVarVal, Ord:0000h
|
:004440F0 FF15B8114000 Call dword ptr [004011B8]
:004440F6 50 push eax
* Reference To: MSVBVM60.rtcTrimBstr, Ord:0207h
|
:004440F7 FF1558104000 Call dword ptr [00401058]
:004440FD 8BD0 mov edx, eax /前面计算结果转化成十进制数后再生成最终变码。
:004440FF 8D4DC0 lea ecx, dword ptr [ebp-40]
:00444102 FFD7 call edi
:00444104 8B4D08 mov ecx, dword ptr [ebp+08]
:00444107 8B75C0 mov esi, dword ptr [ebp-40]
:0044410A 6A02 push 00000002
:0044410C C745C000000000 mov [ebp-40], 00000000
:00444113 8B11 mov edx, dword ptr [ecx] /取注册码得到最后两位
:00444115 52 push edx
* Reference To: MSVBVM60.rtcRightCharBstr, Ord:026Ah
|
:00444116 FF1570124000 Call dword ptr [00401270]
:0044411C 8BD0 mov edx, eax
:0044411E 8D4DC8 lea ecx, dword ptr [ebp-38]
:00444121 FFD7 call edi
:00444123 50 push eax
:00444124 6A02 push 00000002
:00444126 8BD6 mov edx, esi
:00444128 8D4DCC lea ecx, dword ptr [ebp-34]
:0044412B FFD7 call edi
:0044412D 50 push eax /取出最终变码的后两位
* Reference To: MSVBVM60.rtcRightCharBstr, Ord:026Ah
|
:0044412E FF1570124000 Call dword ptr [00401270]
:00444134 8BD0 mov edx, eax
:00444136 8D4DC4 lea ecx, dword ptr [ebp-3C]
:00444139 FFD7 call edi
:0044413B 50 push eax
* Reference To: MSVBVM60.__vbaStrCmp, Ord:0000h
|
:0044413C FF1510114000 Call dword ptr [00401110] /比较变码的后两位与注册码后两位相同则成功。
//////////////////////////////////////////////////////////////////////////////
算法总结：
1、注册码必为14位。将注册码前12位中数字累加。
2、将机器码后两位数字变化得到变码，再用变码与前累加和相加，转化成十进制数，取最后两位并与注册码最后两位比较相同则成功。
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