VB Pcode破解方法及实例

破解工具：exdec.exe（vb pcode反编译工具） http://guodong.home.sohu.com/exdec.zip

破解对象：风飘雪crackme001 （下载http://duba.126.com)

exdec反编译

Email josephco_@hotmail.com with any errors or problems

This program doesn't have executable code right after it loads

Proc: 402870

40276C: f5 LitI4: 0x0 0 (....)

402771: 71 FStR4 local_0098

402774: f5 LitI4: 0x0 0 (....)

402779: 71 FStR4 local_009C

40277C: 04 FLdRfVar local_00A4

40277F: 21 FLdPrThis

402780: 0f VCallAd 7b3fc360

402783: 19 FStAdFunc local_00A0

402786: 08 FLdPr local_00A0

402789: 0d VCallHresult 7b3fbe88

40278E: 3e FLdZeroAd local_00A4

402791: 31 FStStr local_0090

402794: 1a FFree1Ad local_00A0

402797: 04 FLdRfVar local_00A4

40279A: 21 FLdPrThis

40279B: 0f VCallAd 7b3fc358

40279E: 19 FStAdFunc local_00A0

4027A1: 08 FLdPr local_00A0

4027A4: 0d VCallHresult 7b3fbe88

4027A9: 3e FLdZeroAd local_00A4

4027AC: 31 FStStr local_0094

4027AF: 1a FFree1Ad local_00A0

4027B2: 6c ILdRf local_0090

4027B5: 4a FnLenStr ====取输入姓名长度（0090）

4027B6: f5 LitI4: 0x9 9 (....)

4027BB: d1 LtI4

4027BC: 6c ILdRf local_0090

4027BF: 4a FnLenStr

4027C0: f5 LitI4: 0xb 11 (....)

4027C5: db GtI4

4027C6: c4 AndI4 =====姓名长度要求9-11

4027C7: 6c ILdRf local_0094

4027CA: 4a FnLenStr ====取输入注册码长度（0094）

4027CB: f5 LitI4: 0x9 9 (....)

4027D0: d1 LtI4

4027D1: c5 OrI4 =====注册码长度要求大于等于9

4027D2: 1c BranchF: 4027DA

4027D5: 10 ThisVCallHresult 0

4027DA: f4 LitI2_Byte: 0x1 1 (.) ===步长1（I2）

4027DC: 04 FLdRfVar local_008A

4027DF: 6c ILdRf local_0090 ====读入姓名（0090）

4027E2: 4a FnLenStr

4027E3: e4 CI2I4

4027E4: Lead3/63 ForI2: (when done) 402829

4027EA: 27 LitVar_Missing ==============循环

4027ED: 6b FLdI2 local_008A

4027F0: e7 CI4UI1

4027F1: 6c ILdRf local_0090

4027F4: 0b ImpAdCallI2 

4027F9: 23 FStStrNoPop local_00A4

4027FC: 0b ImpAdCallI2 

402801: e7 CI4UI1

402802: 71 FStR4 local_0088

402805: 2f FFree1Str local_00A4

402808: 35 FFree1Var local_00C8

40280B: 6c ILdRf local_0098

40280E: 6c ILdRf local_0088

402811: f5 LitI4: 0x4 4 (....)

402816: b2 MulI4 =====ascii码值乘4

402817: aa AddI4

402818: f5 LitI4: 0x12 18 (....)

40281D: aa AddI4 ======加18

40281E: 71 FStR4 local_0098

402821: 04 FLdRfVar local_008A

402824: 64 NextI2: (continue) 4027EA==========循环（I2）

402829: 6c ILdRf local_0098

40282C: f5 LitI4: 0x817fdb0 135790000 (....)

402831: aa AddI4 ======加135790000

402832: 71 FStR4 local_0098

402835: 6c ILdRf local_0094 =====读入注册码

402838: 0a ImpAdCallFPR4: 

40283D: f4 LitI2_Byte: 0x18 24 (.)

40283F: eb CR8I2

402840: ab AddR8 =======加24

402841: e8 CI4R8

402842: 71 FStR4 local_009C

402845: 6c ILdRf local_0098

402848: 6c ILdRf local_009C

40284B: c7 EqI4 ====相等则真

40284C: 1c BranchF: 402867

40284F: 1b LitStr: http://duba.126.com ====正确注册结果

402852: 21 FLdPrThis

402853: 0f VCallAd 7b3fc348

402856: 19 FStAdFunc local_00A0

402859: 08 FLdPr local_00A0

40285C: 0d VCallHresult 7b3fbdf0

402861: 1a FFree1Ad local_00A0

402864: 1e Branch: 40286c

402867: 10 ThisVCallHresult 0

40286C: 13 ExitProcHresult

Proc: 40272c

402700: 27 LitVar_Missing

402703: 27 LitVar_Missing

402706: 27 LitVar_Missing

402709: f5 LitI4: 0x0 0 (....)

40270E: 3a LitVarStr: ( local_0094 )

402713: 4e FStVarCopyObj local_00A4

402716: 04 FLdRfVar local_00A4

402719: 0a ImpAdCallFPR4: 

40271E: 36 FFreeVar

402729: Lead1/c8 End

40272B: 13 ExitProcHresult

Successfully went through the program!

Now it's up to you to decipher it hehe!

Email josephco_@hotmail.com with any problems or errors

（出处：赢政天下整理收藏）

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