加密狗技术网 加密狗破解 某图标软件破解分析手记

某图标软件破解分析手记

* Referenced by a (U)nconditional or (C)onditional Jump…

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0041CA71(C)
|
:0041CA8C E89E080000              call 0041D32F
:0041CA91 85C0                    test eax, eax
:0041CA93 7423                    jnz 0041CAB8      //改为  jmp 0041CAB8
:0041CA95 6830200000              push 00002030

* Possible Reference to String Resource ID=00041: “This trial version of SmartDraw has now expired. You may dow”
                                  |
:0041CA9A 6A29                    push 00000029
:0041CA9C E8E0B2FEFF              call 00407D81
:0041CAA1 83C408                  add esp, 00000008

* Possible Ref to Menu: MDMENU, Item: “Object”
                                  |
:0041CAA4 C705A00D590001000000    mov dword ptr [00590DA0], 00000001

* Possible Ref to Menu: MDMENU, Item: “Object”
                                  |
:0041CAAE C705A80D590001000000    mov dword ptr [00590DA8], 00000001  //设过期标志

l    Referenced by a (U)nconditional or (C)onditional Jump at Address:

查:”This Trial Version License HAS EXPIRED!”
找到判断过期标志的依据如下:
Name:            CANTSAVE, # of Controls=010, Caption:”SmartDraw Trial Edition License Expired!”, ClassName:””  // 注意这个CANTSAVE
    001 – ControlID:0006, Control Class:”BUTTON” Control Text:”No”
    002 – ControlID:0009, Control Class:”BUTTON” Control Text:”&Purchase”
    003 – ControlID:0007, Control Class:”BUTTON” Control Text:”&Continue”
    004 – ControlID:FFFF, Control Class:”STATIC” Control Text:””
    005 – ControlID:FFFF, Control Class:”STATIC” Control Text:”This Trial Version License HAS EXPIRED!”
    006 – ControlID:FFFF, Control Class:”BUTTON” Control Text:””
    007 – ControlID:FFFF, Control Class:”STATIC” Control Text:”YOU ARE NO LONGER ABLE TO SAVE DOCUMENTS”
    008 – ControlID:1389, Control Class:”STATIC” Control Text:”15″
    009 – ControlID:040C, Control Class:”BUTTON” Control Text:”Dummy”
    010 – ControlID:FFFF, Control Class:”STATIC” Control Text:”To purchase SmartDraw, press the Purchase button.”
以下是由CANTSAVE所查到
/////不能另存为提示

* Referenced by a CALL at Address:
|:004099EE 
|
:005356E4 55                      push ebp
:005356E5 8BEC                    mov ebp, esp
:005356E7 81EC48020000            sub esp, 00000248
:005356ED C785C0FDFFFF00000000    mov dword ptr [ebp+FFFFFDC0], 00000000
:005356F7 C785E8FEFFFF00000000    mov dword ptr [ebp+FFFFFEE8], 00000000
:00535701 C745F400000000          mov [ebp-0C], 00000000
:00535708 833DA80D590000          cmp dword ptr [00590DA8], 00000000      //比较
:0053570F 741A                    je 0053572B

* Possible Reference to String Resource ID=00002: “There is no active printer selected. Choose Page Setup from “
                                  |
:00535711 6A02                    push 00000002

* Possible StringData Ref from Data Obj ->”CANTSAVE”    //不能另存为提示
                                  |
:00535713 6800F25800              push 0058F200
:00535718 A1201D5900              mov eax, dword ptr [00591D20]
:0053571D 50                      push eax
:0053571E E8F28F0000              call 0053E715
:00535723 83C40C                  add esp, 0000000C
:00535726 E94F030000              jmp 00535A7A


////不能存为模板提示

* Referenced by a CALL at Address:
|:004099F8 
|
:00535BF4 55                      push ebp
:00535BF5 8BEC                    mov ebp, esp
:00535BF7 81EC38020000            sub esp, 00000238
:00535BFD C785C8FDFFFF00000000    mov dword ptr [ebp+FFFFFDC8], 00000000
:00535C07 833DA80D590000          cmp dword ptr [00590DA8], 00000000    //比较
:00535C0E 741A                    je 00535C2A

* Possible Reference to String Resource ID=00002: “There is no active printer selected. Choose Page Setup from “
                                  |
:00535C10 6A02                    push 00000002

* Possible StringData Ref from Data Obj ->”CANTSAVE”      //不能保存为模板提示
                                  |
:00535C12 6814F25800              push 0058F214
:00535C17 A1201D5900              mov eax, dword ptr [00591D20]
:00535C1C 50                      push eax
:00535C1D E8F38A0000              call 0053E715
:00535C22 83C40C                  add esp, 0000000C
:00535C25 E9DE010000              jmp 00535E08


////不能保存文件提示
* Referenced by a CALL at Addresses:
|:004099E1  , :005362C8  , :0053647E  , :00546B5B 
|
:00535E0C 55                      push ebp
:00535E0D 8BEC                    mov ebp, esp
:00535E0F 81EC20010000            sub esp, 00000120
:00535E15 C785E8FEFFFF00000000    mov dword ptr [ebp+FFFFFEE8], 00000000
:00535E1F 833DA80D590000          cmp dword ptr [00590DA8], 00000000  //比较
:00535E26 741C                    je 00535E44

* Possible Reference to String Resource ID=00002: “There is no active printer selected. Choose Page Setup from “
                                  |
:00535E28 6A02                    push 00000002

* Possible StringData Ref from Data Obj ->”CANTSAVE”  //不能保存文件提示

                                  |
:00535E2A 6820F25800              push 0058F220
:00535E2F A1201D5900              mov eax, dword ptr [00591D20]
:00535E34 50                      push eax

由上可知[00590DA8]为过期标志

修改方法:
查e8 9e 08 00 00 85 c0 74 23  改为:e8 9e 08 00 00 85 c0 eb 23

查c7 05 a8 0d 59 00 01 00 00 00 替换为:c7 05 a8 0d 59 00 00 00 00 00  (共6处)

实际还有其它方法可解决问题,在此不列出了。

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