蓝帆打支票 V5.0 算法分析

00401F88 . E8 FFF90B00 CALL dfcg.004C198C《＝入此CALL

============================================================================================

004C198C /$ 55 PUSH EBP

004C198D |. 8BEC MOV EBP,ESP

004C198F |. 83C4 CC ADD ESP,-34

004C1992 |. 53 PUSH EBX《＝EBX=01122B66=17967974这个就是注册码（EBX是怎么来的呢？我没看出来！请熊哥指教！！它的机器码还在后面才出现，怪！！）

004C1993 |. 894D F8 MOV DWORD PTR SS:[EBP-8],ECX

004C1996 |. 8955 D0 MOV DWORD PTR SS:[EBP-30],EDX

004C1999 |. 8BD8 MOV EBX,EAX

004C199B |. B8 7CA34E00 MOV EAX,dfcg.004EA37C

004C19A0 |. E8 5B54FFFF CALL dfcg.004B6E00

004C19A5 |. 66:C745 E4 080>MOV WORD PTR SS:[EBP-1C],8

004C19AB |. 8D45 FC LEA EAX,DWORD PTR SS:[EBP-4]

004C19AE |. 8BD3 MOV EDX,EBX

004C19B0 |. E8 43FCFFFF CALL dfcg.004C15F8

004C19B5 |. FF45 F0 INC DWORD PTR SS:[EBP-10]

004C19B8 |. 66:C745 E4 140>MOV WORD PTR SS:[EBP-1C],14

004C19BE |. 8D4D FC LEA ECX,DWORD PTR SS:[EBP-4]

004C19C1 |. 894D CC MOV DWORD PTR SS:[EBP-34],ECX

004C19C4 |. 8B45 CC MOV EAX,DWORD PTR SS:[EBP-34]

004C19C7 |. 8B55 D0 MOV EDX,DWORD PTR SS:[EBP-30]

004C19CA |. 8B12 MOV EDX,DWORD PTR DS:[EDX]《＝Stack DS:[0012ff7c]=010b278c,ASCII 为机器码2040821

004C19CC |. E8 F724FFFF CALL dfcg.004B3EC8

004C19D1 |. 66:C745 E4 200>MOV WORD PTR SS:[EBP-1C],20

004C19D7 |. 8D55 FC LEA EDX,DWORD PTR SS:[EBP-4]

004C19DA |. 8B45 F8 MOV EAX,DWORD PTR SS:[EBP-8]

004C19DD |. E8 5AFDFFFF CALL dfcg.004C173C

004C19E2 |. 8B45 F8 MOV EAX,DWORD PTR SS:[EBP-8]

004C19E5 |. 66:C745 E4 2C0>MOV WORD PTR SS:[EBP-1C],2C

004C19EB |. 50 PUSH EAX

004C19EC |. FF4D F0 DEC DWORD PTR SS:[EBP-10]

004C19EF |. 8D45 FC LEA EAX,DWORD PTR SS:[EBP-4]

004C19F2 |. BA 02000000 MOV EDX,2

004C19F7 |. E8 10FDFFFF CALL dfcg.004C170C

004C19FC |. 58 POP EAX

004C19FD |. 66:C745 E4 200>MOV WORD PTR SS:[EBP-1C],20

004C1A03 |. FF45 F0 INC DWORD PTR SS:[EBP-10]

004C1A06 |. 8B55 D4 MOV EDX,DWORD PTR SS:[EBP-2C]

004C1A09 |. 64:67:8916 000>MOV DWORD PTR FS:[0],EDX

004C1A0F |. 5B POP EBX

004C1A10 |. 8BE5 MOV ESP,EBP

004C1A12 |. 5D POP EBP

004C1A13 \. C3 RETN

===========================================================================================

00401F8D . 8D85 7CFFFFFF LEA EAX,DWORD PTR SS:[EBP-84]

00401F93 . 50 PUSH EAX

00401F94 . BA 0D614D00 MOV EDX,dfcg.004D610D ; ASCII " "

00401F99 . 8D85 78FFFFFF LEA EAX,DWORD PTR SS:[EBP-88]

00401F9F . E8 54F60B00 CALL dfcg.004C15F8

00401FA4 . FF85 34FFFFFF INC DWORD PTR SS:[EBP-CC]

00401FAA . 33C9 XOR ECX,ECX

00401FAC . 898D 74FFFFFF MOV DWORD PTR SS:[EBP-8C],ECX

00401FB2 . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]

00401FB8 . FF85 34FFFFFF INC DWORD PTR SS:[EBP-CC]

00401FBE . 8D95 78FFFFFF LEA EDX,DWORD PTR SS:[EBP-88]

00401FC4 . 58 POP EAX

00401FC5 . E8 86F70B00 CALL dfcg.004C1750

00401FCA . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]

00401FD0 . 8B02 MOV EAX,DWORD PTR DS:[EDX]

00401FD2 . 50 PUSH EAX

00401FD3 . BA 13614D00 MOV EDX,dfcg.004D6113

00401FD8 . 8D85 70FFFFFF LEA EAX,DWORD PTR SS:[EBP-90]

00401FDE . E8 15F60B00 CALL dfcg.004C15F8

00401FE3 . FF85 34FFFFFF INC DWORD PTR SS:[EBP-CC]

00401FE9 . 8B10 MOV EDX,DWORD PTR DS:[EAX]

00401FEB . 52 PUSH EDX

00401FEC . BA EC604D00 MOV EDX,dfcg.004D60EC

00401FF1 . 8D45 80 LEA EAX,DWORD PTR SS:[EBP-80]

00401FF4 . E8 FFF50B00 CALL dfcg.004C15F8

00401FF9 . FF85 34FFFFFF INC DWORD PTR SS:[EBP-CC] ; |

00401FFF . 8B00 MOV EAX,DWORD PTR DS:[EAX] ; |

00402001 . 59 POP ECX ; |

00402002 . 5A POP EDX ; |

00402003 . E8 4C4B0600 CALL dfcg.00466B54《＝出现注册对话框 \dfcg.00466B54 00402008 . 8D85 6CFFFFFF LEA EAX,DWORD PTR SS:[EBP-94]

0040200E . 8B00 MOV EAX,DWORD PTR DS:[EAX]《＝假码入EAX

00402010 . E8 AF030A00 CALL dfcg.004A23C4《＝逐位取假码并转换为16进制放EAX

00402015 . 8BF8 MOV EDI,EAX《＝EAX＝76ADF1=7777777(假码)

00402017 . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC]

0040201D . 8D85 6CFFFFFF LEA EAX,DWORD PTR SS:[EBP-94]

00402023 . BA 02000000 MOV EDX,2

00402028 . E8 DFF60B00 CALL dfcg.004C170C＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

0040202D . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC] 我看不出这些CALL在做什么！

00402033 . 8D85 70FFFFFF LEA EAX,DWORD PTR SS:[EBP-90]

00402039 . BA 02000000 MOV EDX,2

0040203E . E8 C9F60B00 CALL dfcg.004C170C

00402043 . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC]

00402049 . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]

0040204F . BA 02000000 MOV EDX,2

00402054 . E8 B3F60B00 CALL dfcg.004C170C

00402059 . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC]

0040205F . 8D85 78FFFFFF LEA EAX,DWORD PTR SS:[EBP-88]

00402065 . BA 02000000 MOV EDX,2

0040206A . E8 9DF60B00 CALL dfcg.004C170C

0040206F . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC]

00402075 . 8D85 7CFFFFFF LEA EAX,DWORD PTR SS:[EBP-84]

0040207B . BA 02000000 MOV EDX,2

00402080 . E8 87F60B00 CALL dfcg.004C170C

00402085 . FF8D 34FFFFFF DEC DWORD PTR SS:[EBP-CC]

0040208B . 8D45 80 LEA EAX,DWORD PTR SS:[EBP-80]

0040208E . BA 02000000 MOV EDX,2

00402093 . E8 74F60B00 CALL dfcg.004C170C＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

00402098 . 66:C785 28FFFF>MOV WORD PTR SS:[EBP-D8],128

004020A1 . 3BDF CMP EBX,EDI《＝比较真假码，EDI=76ADF1=7777777(假码),EBX=01122B66=17967974(真码)

004020A3 . 0F85 F2000000 JNZ dfcg.0040219B

内存注册机

中断地址 4020A1

中断次数 1

第一字节 3B

指令长度 2

寄存器方式》EBX》十进制

ID=压力锅2

（出处：赢政天下整理收藏）

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