如图所示:已知:某款Delphi控件;随便编译一个EXE;输出就会
水印大作战
症状1:全屏都是大水印;
症状2:偶尔弹框Thank you for evaluating the
求证:去掉限制;找到对应的控件相关文件一次给多个版本的所有文件打补丁。
水印大作战
水印大作战
再到这个EXE文件中用winhex修改1个字节,看是否被调用了?是的。变了吧?
接下来就可调试了。
第1 处的位置没难度,直接爆破JMP跳过就可以了。
注意看红线,默认本次是跳过的,但是有时则不会,所以安全起见jmp伺候
水印大作战
接下来水印限制就是考你基本功和经验值的问题了。
通常定位到该字符串下个硬件访问断点
水印大作战
注意看成功断下了,但是已经晚了八春了。
为啥会这样呢?
  • 因为产生此水印的文件有好多个(*.bpl ; *.dcu ; *.obj),会产生干扰因素
  • 时机晚了!为啥呢? 因为是动态渲染出来的
水印大作战
水印大作战
所以正确的解法是:
看到了吧? 水印就是这么来的。
Ctrl+A, Ctrl-
图中的代码很很长很长,只粘最有意义的部分:
[Asm] 纯文本查看 复制代码
007CE66B     | E8 F0BCE3FF          | call project6.60A360            |007CE670     | 85C0                 | test eax,eax                    |007CE672     | EB 5B                | jmp project6.7CE6CF             | 还得JMP007CE674     | 8B45 0C              | mov eax,dword ptr ss:[ebp+C]    |007CE677     | 8B55 EC              | mov edx,dword ptr ss:[ebp-14]   |007CE67A     | 48                   | dec eax                         |007CE67B     | 85D2                 | test edx,edx                    |007CE67D     | 74 05                | je project6.7CE684              |007CE67F     | 3B42 FC              | cmp eax,dword ptr ds:[edx-4]    |007CE682     | 72 05                | jb project6.7CE689              |007CE684     | E8 2799C3FF          | call <project6.sub_407FB0>      |007CE689     | 40                   | inc eax                         |007CE68A     | 8D4442 FE            | lea eax,dword ptr ds:[edx+eax*2 |007CE68E     | 8945 E8              | mov dword ptr ss:[ebp-18],eax   |007CE691     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE694     | 8B50 54              | mov edx,dword ptr ds:[eax+54]   |007CE697     | 8B52 04              | mov edx,dword ptr ds:[edx+4]    |007CE69A     | 52                   | push edx                        |007CE69B     | 8B55 E4              | mov edx,dword ptr ss:[ebp-1C]   |007CE69E     | 8B92 F0000000        | mov edx,dword ptr ds:[edx+F0]   |007CE6A4     | 8B52 04              | mov edx,dword ptr ds:[edx+4]    |007CE6A7     | 52                   | push edx                        |007CE6A8     | 8D55 F0              | lea edx,dword ptr ss:[ebp-10]   |007CE6AB     | 52                   | push edx                        |007CE6AC     | 8B40 50              | mov eax,dword ptr ds:[eax+50]   |007CE6AF     | 8B40 04              | mov eax,dword ptr ds:[eax+4]    |007CE6B2     | 50                   | push eax                        |007CE6B3     | 8B45 08              | mov eax,dword ptr ss:[ebp+8]    |007CE6B6     | 50                   | push eax                        |007CE6B7     | 8B45 E8              | mov eax,dword ptr ss:[ebp-18]   |007CE6BA     | 50                   | push eax                        |007CE6BB     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE6BE     | 8B80 E8000000        | mov eax,dword ptr ds:[eax+E8]   |007CE6C4     | 8B40 04              | mov eax,dword ptr ds:[eax+4]    |007CE6C7     | 50                   | push eax                        |007CE6C8     | E8 3B87FDFF          | call <JMP.&GdipDrawString>      |007CE6CD     | EB 07                | jmp project6.7CE6D6             |007CE6CF     | 55                   | push ebp                        |007CE6D0     | 90                   | nop                             | 从段首出来007CE6D1     | 90                   | nop                             |007CE6D2     | 90                   | nop                             |007CE6D3     | 90                   | nop                             |007CE6D4     | 90                   | nop                             |007CE6D5     | 59                   | pop ecx                         |007CE6D6     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE6D9     | F640 24 04           | test byte ptr ds:[eax+24],4     |007CE6DD     | 0F84 EB000000        | je project6.7CE7CE              |007CE6E3     | 33D2                 | xor edx,edx                     |007CE6E5     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE6E8     | 8B08                 | mov ecx,dword ptr ds:[eax]      |007CE6EA     | FF51 74              | call dword ptr ds:[ecx+74]      |007CE6ED     | 8B45 E0              | mov eax,dword ptr ss:[ebp-20]   |007CE6F0     | FF30                 | push dword ptr ds:[eax]         |007CE6F2     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE6F5     | D940 14              | fld st(0),dword ptr ds:[eax+14] |007CE6F8     | D9E1                 | fabs                            |007CE6FA     | D835 F4E77C00        | fdiv st(0),dword ptr ds:[7CE7F4 |007CE700     | 83C4 F4              | add esp,FFFFFFF4                |007CE703     | DB3C24               | fstp tword ptr ss:[esp],st(0)   |007CE706     | 9B                   | fwait                           |007CE707     | E8 C4A8C7FF          | call <project6.sub_448FD0>      |007CE70C     | 8945 D4              | mov dword ptr ss:[ebp-2C],eax   |007CE70F     | DB45 D4              | fild st(0),dword ptr ss:[ebp-2C |007CE712     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE715     | D840 14              | fadd st(0),dword ptr ds:[eax+14 |007CE718     | 83C4 F4              | add esp,FFFFFFF4                |007CE71B     | DB3C24               | fstp tword ptr ss:[esp],st(0)   |007CE71E     | 9B                   | fwait                           |007CE71F     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE722     | D940 14              | fld st(0),dword ptr ds:[eax+14] |007CE725     | D9E1                 | fabs                            |007CE727     | D835 F8E77C00        | fdiv st(0),dword ptr ds:[<sub_7 |007CE72D     | E8 2293C3FF          | call <project6.sub_407A54>      |007CE732     | 8945 D8              | mov dword ptr ss:[ebp-28],eax   |007CE735     | 8955 DC              | mov dword ptr ss:[ebp-24],edx   |007CE738     | DF6D D8              | fild st(0),qword ptr ss:[ebp-28 |007CE73B     | D835 FCE77C00        | fdiv st(0),dword ptr ds:[7CE7FC |007CE741     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE744     | D940 48              | fld st(0),dword ptr ds:[eax+48] |007CE747     | D835 FCE77C00        | fdiv st(0),dword ptr ds:[7CE7FC |007CE74D     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE750     | D840 44              | fadd st(0),dword ptr ds:[eax+44 |007CE753     | DEE1                 | fsubrp st(1),st(0)              |007CE755     | 83C4 F4              | add esp,FFFFFFF4                |007CE758     | DB3C24               | fstp tword ptr ss:[esp],st(0)   |007CE75B     | 9B                   | fwait                           |007CE75C     | E8 BFA9C7FF          | call <project6.sub_449120>      |007CE761     | D845 F4              | fadd st(0),dword ptr ss:[ebp-C] |007CE764     | D95D D4              | fstp dword ptr ss:[ebp-2C],st(0 |007CE767     | 9B                   | fwait                           |007CE768     | FF75 D4              | push dword ptr ss:[ebp-2C]      |007CE76B     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE76E     | E8 0D0E0000          | call <project6.sub_7CF580>      |007CE773     | 83C4 FC              | add esp,FFFFFFFC                |007CE776     | D91C24               | fstp dword ptr ss:[esp],st(0)   |007CE779     | 9B                   | fwait                           |007CE77A     | 8B45 E0              | mov eax,dword ptr ss:[ebp-20]   |007CE77D     | E8 5625E4FF          | call <project6.sub_610CD8>      |007CE782     | 83C4 FC              | add esp,FFFFFFFC                |007CE785     | D91C24               | fstp dword ptr ss:[esp],st(0)   |007CE788     | 9B                   | fwait                           |007CE789     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE78C     | D940 14              | fld st(0),dword ptr ds:[eax+14] |007CE78F     | D9E1                 | fabs                            |007CE791     | D835 F8E77C00        | fdiv st(0),dword ptr ds:[<sub_7 |007CE797     | 83C4 F4              | add esp,FFFFFFF4                |007CE79A     | DB3C24               | fstp tword ptr ss:[esp],st(0)   |007CE79D     | 9B                   | fwait                           |007CE79E     | E8 2DA8C7FF          | call <project6.sub_448FD0>      |007CE7A3     | 8945 D4              | mov dword ptr ss:[ebp-2C],eax   |007CE7A6     | DB45 D4              | fild st(0),dword ptr ss:[ebp-2C |007CE7A9     | D95D D0              | fstp dword ptr ss:[ebp-30],st(0 |007CE7AC     | 9B                   | fwait                           |007CE7AD     | FF75 D0              | push dword ptr ss:[ebp-30]      |007CE7B0     | 8B45 14              | mov eax,dword ptr ss:[ebp+14]   |007CE7B3     | 8B50 54              | mov edx,dword ptr ds:[eax+54]   |007CE7B6     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE7B9     | 8B80 E8000000        | mov eax,dword ptr ds:[eax+E8]   |007CE7BF     | E8 30D8FEFF          | call project6.7BBFF4            |007CE7C4     | B2 01                | mov dl,1                        |007CE7C6     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE7C9     | 8B08                 | mov ecx,dword ptr ds:[eax]      |007CE7CB     | FF51 74              | call dword ptr ds:[ecx+74]      |007CE7CE     | 80FB 01              | cmp bl,1                        |007CE7D1     | 75 10                | jne project6.7CE7E3             |007CE7D3     | 8B45 E4              | mov eax,dword ptr ss:[ebp-1C]   |007CE7D6     | 8B80 F0000000        | mov eax,dword ptr ds:[eax+F0]   |007CE7DC     | 33D2                 | xor edx,edx                     |007CE7DE     | E8 2D8AFEFF          | call <project6.sub_7B7210>      |007CE7E3     | 5F                   | pop edi                         |007CE7E4     | 5E                   | pop esi                         |007CE7E5     | 5B                   | pop ebx                         |007CE7E6     | 8BE5                 | mov esp,ebp                     |007CE7E8     | 5D                   | pop ebp                         |007CE7E9     | C2 1000              | ret 10                          |

为啥产生了水印呢? 因为下面的两个call
第1次:007CE6C8     | E8 3B87FDFF          | call <JMP.&GdipDrawString> 这个之后进入我们刚才上面分析的的那个代码不远处     
第2次 GdipSetStringFormatT
所以明白了原因 问题就简单了。
007CE672     | 75 5B                | jne project6.7CE6CF             如果不实现那么下面的jmp就会自己跳过
但当你这么做之后,发现修改之后程序还会再执行到,所以下面的那个call直接NOP掉
下面还有一个007CE7D1     | 75 10                | jne project6.7CE7E3            
程序自己会自己跳过GdipSetStringFormatT所以就没必要修改了。
然后再F8向下
发现
007CE672     | 75 5B                | jne project6.7CE6CF             | 这句又回来了。。。所以呢,此处还得JMP掉
007CE674     | 8B45 0C              | mov eax,dword ptr ss:[ebp+C]    |
007CE677     | 8B55 EC              | mov edx,dword ptr ss:[ebp-14]   | [ebp-14]:L"Trial version, please register"
水印大作战
这样就不会有水印产生了。
水印大作战接着TC搜索下字符串所在的插件目录;就会得到一大波相关的文件;然后用WinHEX把可疑的若干文件修改掉
水印大作战
批量打补丁与命令行一劳永逸制作:可以参考
:::Change display text
sfk replace -binary "/4500760061006C0075006100740069006F006E002000760065007200730069006F006E002E00200057006F0072006B00730020006F006E006C007900200069006E002000490044004500/43007200610063006B00650064002000760065007200730069006F006E002E002000200068007400740070003A002F002F00350031007800690061007A00610069002E0063006F006D00/" -dir "%cd%" -yes -file *.dcu
:::Disable RED message on splash screen
sfk replace -binary "/536A016840/536A006840/" -dir "%cd%" -yes -file Splash.dcu
:::Delete wateremark
:sfk replace -binary "/FFFFFFFF3E000000450068004C00690062002000/FFFFFFFF00000000450068004C00690062002000/" -dir "%cd%" -yes -file Gh.dcu
:sfk replace -binary "/FFFFFFFF3E00000045684C696220/FFFFFFFF0000000045684C696220/" -dir "%cd%" -yes -file Gh.dcu
:sfk replace -binary "/FFFFFFFF3F000000450068004C00690062002000/FFFFFFFF00000000450068004C00690062002000/" -dir "%cd%" -yes -file Gh.dcu
:sfk replace -binary "/FFFFFFFF3F00000045684C696220/FFFFFFFF0000000045684C696220/" -dir "%cd%" -yes -file Gh.dcu
sfk replace -binary "/3F00000045/0000000045/" -dir "%cd%" -yes -file Gh.dcu

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水印大作战

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