本帖最后由 Jian丶ylt 于 2015-11-17 01:17 编辑
声明：
1.只为纪录自己成长历程，高手勿喷
2.您的热心是新手持续发帖的动力
首先需要说的是，这个壳是ximo大神视频教程里的<ACProtect之补区段>，感兴趣的朋友可以自行搜索ximo大神的视频区看。针对这个壳的脱法没有增加任何个人意见，因为中间的很多操作我也不明了，但记录下来的目的是为了以后有类似情况的时候可以作为参考，毕竟百度不是万能的。
1.PEID载入
ACProtect V1.4X -> risco
2.载入OD，同时忽略所有异常
[Asm] 纯文本查看 复制代码 0041F000 > 60 pushad ; //程序入口点
0041F001 E8 01000000 call NgaMy.0041F007
0041F006 E8 83042406 call 0665F48E
0041F00B C3 retn
0041F00C 43 inc ebx
0041F00D D3DA rcr edx,cl
0041F00F BE 75FC1F8F mov esi,8F1FFC75
3.打开内存界面，在".rdata"处下段，然后shift+F9运行，有些程序可能没有".rdata"，那么就找".IDAta"，之所以会有不同，应该是因为程序的编程语言不同导致。
[Asm] 纯文本查看 复制代码 Memory map, 项目 19
地址=0040A000
大小=00002000 (8192.)
属主=NgaMy 00400000
区段=.rdata
包含=代码,数据
类型=映像 01001002
访问=R
初始访问=RWE
4.落脚点应该是这个位置，首先看下这段代码，据说这段代码fly大神曾经解读过，可惜我没有找到，如果有朋友找到了可以分享一下，感激不尽。在这里我们需要做的是看我写的注释位置，有两行代码要nop掉(右键单击需要nop掉的那一行---二进制---使用nop填充)，还有一行代码改成jmp跳(je改为jmp)。
[Asm] 纯文本查看 复制代码 0043383D 8B46 0C mov eax,dword ptr ds:[esi+C] ; //落脚点
00433840 0BC0 or eax,eax
00433842 0F84 25020000 je NgaMy.00433A6D
00433848 8366 0C 00 and dword ptr ds:[esi+C],0
0043384C 03C2 add eax,edx
0043384E 8BD8 mov ebx,eax
00433850 56 push esi
00433851 57 push edi
00433852 50 push eax
00433853 8BF3 mov esi,ebx
00433855 8BFB mov edi,ebx
00433857 AC lods byte ptr ds:[esi]
00433858 C0C0 03 rol al,3
0043385B AA stos byte ptr es:[edi]
0043385C 803F 00 cmp byte ptr ds:[edi],0
0043385F ^ 75 F6 jnz short NgaMy.00433857
00433861 58 pop eax
00433862 5F pop edi
00433863 5E pop esi
00433864 50 push eax
00433865 FF95 90E24100 call dword ptr ss:[ebp+41E290]
0043386B 0BC0 or eax,eax
0043386D 75 43 jnz short NgaMy.004338B2
0043386F 90 nop
00433870 90 nop
00433871 90 nop
00433872 90 nop
00433873 53 push ebx
00433874 FF95 94E24100 call dword ptr ss:[ebp+41E294]
0043387A 0BC0 or eax,eax
0043387C 75 34 jnz short NgaMy.004338B2
0043387E 90 nop
0043387F 90 nop
00433880 90 nop
00433881 90 nop
00433882 8B95 1FFC4000 mov edx,dword ptr ss:[ebp+40FC1F]
00433888 0195 1D1F4000 add dword ptr ss:[ebp+401F1D],edx
0043388E 0195 211F4000 add dword ptr ss:[ebp+401F21],edx
00433894 6A 00 push 0
00433896 FFB5 1D1F4000 push dword ptr ss:[ebp+401F1D]
0043389C FFB5 211F4000 push dword ptr ss:[ebp+401F21]
004338A2 6A 00 push 0
004338A4 FF95 9CE24100 call dword ptr ss:[ebp+41E29C]
004338AA 6A 00 push 0
004338AC FF95 98E24100 call dword ptr ss:[ebp+41E298]
004338B2 60 pushad
004338B3 2BC0 sub eax,eax
004338B5 8803 mov byte ptr ds:[ebx],al
004338B7 43 inc ebx
004338B8 3803 cmp byte ptr ds:[ebx],al
004338BA ^ 75 F9 jnz short NgaMy.004338B5
004338BC 61 popad
004338BD 8985 17FC4000 mov dword ptr ss:[ebp+40FC17],eax
004338C3 C785 1BFC4000 0>mov dword ptr ss:[ebp+40FC1B],0
004338CD 8B95 1FFC4000 mov edx,dword ptr ss:[ebp+40FC1F]
004338D3 8B06 mov eax,dword ptr ds:[esi]
004338D5 0BC0 or eax,eax
004338D7 75 07 jnz short NgaMy.004338E0
004338D9 90 nop
004338DA 90 nop
004338DB 90 nop
004338DC 90 nop
004338DD 8B46 10 mov eax,dword ptr ds:[esi+10]
004338E0 03C2 add eax,edx
004338E2 0385 1BFC4000 add eax,dword ptr ss:[ebp+40FC1B]
004338E8 8B18 mov ebx,dword ptr ds:[eax]
004338EA 8B7E 10 mov edi,dword ptr ds:[esi+10]
004338ED 03FA add edi,edx
004338EF 03BD 1BFC4000 add edi,dword ptr ss:[ebp+40FC1B]
004338F5 85DB test ebx,ebx
004338F7 0F84 62010000 je NgaMy.00433A5F
004338FD F7C3 00000080 test ebx,80000000
00433903 75 1D jnz short NgaMy.00433922
00433905 90 nop
00433906 90 nop
00433907 90 nop
00433908 90 nop
00433909 03DA add ebx,edx
0043390B 83C3 02 add ebx,2
0043390E 56 push esi
0043390F 57 push edi
00433910 50 push eax
00433911 8BF3 mov esi,ebx
00433913 8BFB mov edi,ebx
00433915 AC lods byte ptr ds:[esi]
00433916 C0C0 03 rol al,3
00433919 AA stos byte ptr es:[edi]
0043391A 803F 00 cmp byte ptr ds:[edi],0
0043391D ^ 75 F6 jnz short NgaMy.00433915
0043391F 58 pop eax
00433920 5F pop edi
00433921 5E pop esi
00433922 3B9D 1FFC4000 cmp ebx,dword ptr ss:[ebp+40FC1F]
00433928 7C 11 jl short NgaMy.0043393B
0043392A 90 nop
0043392B 90 nop
0043392C 90 nop
0043392D 90 nop
0043392E 83BD 02244000 0>cmp dword ptr ss:[ebp+402402],0
00433935 75 0A jnz short NgaMy.00433941
00433937 90 nop
00433938 90 nop
00433939 90 nop
0043393A 90 nop
0043393B 81E3 FFFFFF0F and ebx,0FFFFFFF
00433941 53 push ebx
00433942 FFB5 17FC4000 push dword ptr ss:[ebp+40FC17]
00433948 FF95 8CE24100 call dword ptr ss:[ebp+41E28C]
0043394E 3B9D 1FFC4000 cmp ebx,dword ptr ss:[ebp+40FC1F]
00433954 7C 0F jl short NgaMy.00433965
00433956 90 nop
00433957 90 nop
00433958 90 nop
00433959 90 nop
0043395A 60 pushad
0043395B 2BC0 sub eax,eax
0043395D 8803 mov byte ptr ds:[ebx],al
0043395F 43 inc ebx
00433960 3803 cmp byte ptr ds:[ebx],al
00433962 ^ 75 F9 jnz short NgaMy.0043395D
00433964 61 popad
00433965 0BC0 or eax,eax
00433967 ^ 0F84 15FFFFFF je NgaMy.00433882
0043396D 3B85 9CE24100 cmp eax,dword ptr ss:[ebp+41E29C] ; //比较是否是MessageBoxA
00433973 74 20 je short NgaMy.00433995 ; //这里要nop掉
00433975 90 nop
00433976 90 nop
00433977 90 nop
00433978 90 nop
00433979 3B85 9D014100 cmp eax,dword ptr ss:[ebp+41019D] ; //比较是否是RegisterHotKey
0043397F 74 09 je short NgaMy.0043398A ; //这里要nop掉
00433981 90 nop
00433982 90 nop
00433983 90 nop
00433984 90 nop
00433985 EB 14 jmp short NgaMy.0043399B
00433987 90 nop
00433988 90 nop
00433989 90 nop
0043398A 8D85 0A024100 lea eax,dword ptr ss:[ebp+41020A]
00433990 EB 09 jmp short NgaMy.0043399B
00433992 90 nop
00433993 90 nop
00433994 90 nop
00433995 8D85 24024100 lea eax,dword ptr ss:[ebp+410224]
0043399B 56 push esi
0043399C FFB5 17FC4000 push dword ptr ss:[ebp+40FC17]
004339A2 5E pop esi
004339A3 39B5 FA234000 cmp dword ptr ss:[ebp+4023FA],esi
004339A9 74 15 je short NgaMy.004339C0
004339AB 90 nop
004339AC 90 nop
004339AD 90 nop
004339AE 90 nop
004339AF 39B5 FE234000 cmp dword ptr ss:[ebp+4023FE],esi
004339B5 74 09 je short NgaMy.004339C0
004339B7 90 nop
004339B8 90 nop
004339B9 90 nop
004339BA 90 nop
004339BB EB 63 jmp short NgaMy.00433A20
004339BD 90 nop
004339BE 90 nop
004339BF 90 nop
004339C0 80BD D2594100 0>cmp byte ptr ss:[ebp+4159D2],0
004339C7 74 57 je short NgaMy.00433A20 ; //magic跳，je改jmp
004339C9 90 nop
004339CA 90 nop
004339CB 90 nop
004339CC 90 nop
004339CD EB 07 jmp short NgaMy.004339D6
004339CF 90 nop
004339D0 90 nop
004339D1 90 nop
004339D2 0100 add dword ptr ds:[eax],eax
004339D4 0000 add byte ptr ds:[eax],al
004339D6 8BB5 E4FC4000 mov esi,dword ptr ss:[ebp+40FCE4]
004339DC 83C6 0D add esi,0D
004339DF 81EE EA1B4000 sub esi,NgaMy.00401BEA
004339E5 2BF5 sub esi,ebp
004339E7 83FE 00 cmp esi,0
004339EA 7F 34 jg short NgaMy.00433A20
004339EC 90 nop
004339ED 90 nop
004339EE 90 nop
004339EF 90 nop
5.步骤4执行完毕后再次打开内存界面，在00401000处内存访问断点，SHIFT+F9一次，下面是他的落脚点，落脚后先清除内存访问断点然后在下面最近的retn处F4，然后F8一次
[Asm] 纯文本查看 复制代码 00405560 3D 00100000 cmp eax,1000 //落脚点
00405565 73 0E jnb short NgaMy.00405575
00405567 F7D8 neg eax
00405569 03C4 add eax,esp
0040556B 83C0 04 add eax,4
0040556E 8500 test dword ptr ds:[eax],eax
00405570 94 xchg eax,esp
00405571 8B00 mov eax,dword ptr ds:[eax]
00405573 50 push eax
00405574 C3 retn //F4，然后F8
6.然后再次来到内存界面，在00401000处下内存访问断点，shift+F9运行一次，下面是落脚点，落脚后先清除内存访问断点，然后在retn处F4，F8一次
[Asm] 纯文本查看 复制代码 00405560 3D 00100000 cmp eax,1000 //落脚点
00405565 73 0E jnb short NgaMy.00405575
00405567 F7D8 neg eax
00405569 03C4 add eax,esp
0040556B 83C0 04 add eax,4
0040556E 8500 test dword ptr ds:[eax],eax
00405570 94 xchg eax,esp
00405571 8B00 mov eax,dword ptr ds:[eax]
00405573 50 push eax
00405574 C3 retn //F4，然后F8
7.然后再次来到内存界面在00401000处下内存访问断点，shift+F9运行一次，来到假的OEP
[Asm] 纯文本查看 复制代码 0040305C 83F9 02 cmp ecx,2 //这里就是假OEP
0040305F 74 0C je short NgaMy.0040306D
00403061 81CE 00800000 or esi,8000
00403067 8935 B0DE4000 mov dword ptr ds:[40DEB0],esi
0040306D C1E0 08 shl eax,8
00403070 03C2 add eax,edx
00403072 A3 B4DE4000 mov dword ptr ds:[40DEB4],eax
00403077 33F6 xor esi,esi
00403079 56 push esi
0040307A 8B3D B0A04000 mov edi,dword ptr ds:[40A0B0]
00403080 FFD7 call edi
00403082 66:8138 4D5A cmp word ptr ds:[eax],5A4D
8.至此可以先脱壳了，脱壳的时候需要手动查找IAT，这个比较简单，起始位置是A000，结尾位置是A171
9.重新载入原程序(Ctrl+F2),程序的入口点是一个pushad，F8到下一行使用ESP定律，下硬件访问断点然后shift+F9运行到最后一次异常
[Asm] 纯文本查看 复制代码 0041F000 > 60 pushad ; //入口点
0041F001 E8 01000000 call NgaMy.0041F007 ; //ESP
0041F006 E8 83042406 call 0665F48E
0041F00B C3 retn
0041F00C 43 inc ebx
0041F00D D3DA rcr edx,cl
0041F00F BE 75FC1F8F mov esi,0x8F1FFC75
10.最后一次异常法的落脚点，pushad 上面的就是Stolen Code（NOP可以不复制），二进制复制一下，然后F4运行到注释中的位置(记得清除硬件断点)，也就是pushad下一行再次使用ESP定律，下硬件断点然后shift+F9一次
[Asm] 纯文本查看 复制代码 004365F4 8915 F5FD4100 mov dword ptr ds:[41FDF5],edx ; //落脚点
004365FA FF35 F5FD4100 push dword ptr ds:[41FDF5]
00436600 8F05 2DFE4100 pop dword ptr ds:[41FE2D]
00436606 FF35 2DFE4100 push dword ptr ds:[41FE2D]
0043660C C70424 60000000 mov dword ptr ss:[esp],60
00436613 56 push esi
00436614 890C24 mov dword ptr ss:[esp],ecx
00436617 68 8DFD4100 push NgaMy.0041FD8D
0043661C 59 pop ecx
0043661D 8919 mov dword ptr ds:[ecx],ebx
0043661F 8B0C24 mov ecx,dword ptr ss:[esp]
00436622 8F05 ADFE4100 pop dword ptr ds:[41FEAD]
00436628 FF35 8DFD4100 push dword ptr ds:[41FD8D]
0043662E C70424 48A24000 mov dword ptr ss:[esp],NgaMy.0040A248
00436635 8905 B9FD4100 mov dword ptr ds:[41FDB9],eax
0043663B FF35 B9FD4100 push dword ptr ds:[41FDB9]
00436641 90 nop
00436642 90 nop
00436643 60 pushad
00436644 E8 01000000 call NgaMy.0043664A //F4到这里，然后用ESP
[Asm] 纯文本查看 复制代码 89 15 F5 FD 41 00 FF 35 F5 FD 41 00 8F 05 2D FE 41 00 FF 35 2D FE 41 00 C7 04 24 60 00 00 00 56
89 0C 24 68 8D FD 41 00 59 89 19 8B 0C 24 8F 05 AD FE 41 00 FF 35 8D FD 41 00 C7 04 24 48 A2 40
00 89 05 B9 FD 41 00 FF 35 B9 FD 41 00
11.落脚点到这个位置，还是一样二进制复制pushad上面的代码(记得清除硬件断点)，然后F4运行到pushad下面一行使用ESP定律，下硬件访问断点，shift+F9一次
[Asm] 纯文本查看 复制代码 00436F16 68 1DFD4100 push NgaMy.0041FD1D ;//落脚点
00436F1B 58 pop eax
00436F1C 8930 mov dword ptr ds:[eax],esi
00436F1E 8F05 79FC4100 pop dword ptr ds:[41FC79]
00436F24 8B05 79FC4100 mov eax,dword ptr ds:[41FC79]
00436F2A FF35 1DFD4100 push dword ptr ds:[41FD1D]
00436F30 56 push esi
00436F31 891C24 mov dword ptr ss:[esp],ebx
00436F34 C70424 383D4000 mov dword ptr ss:[esp],NgaMy.00403D38
00436F3B 8B3424 mov esi,dword ptr ss:[esp]
00436F3E 8F05 A5FE4100 pop dword ptr ds:[41FEA5]
00436F44 8905 01FF4100 mov dword ptr ds:[41FF01],eax
00436F4A FF35 01FF4100 push dword ptr ds:[41FF01]
00436F50 891C24 mov dword ptr ss:[esp],ebx
00436F53 56 push esi
00436F54 C70424 45FE4100 mov dword ptr ss:[esp],NgaMy.0041FE45
00436F5B 8F05 31FE4100 pop dword ptr ds:[41FE31]
00436F61 90 nop
00436F62 90 nop
00436F63 60 pushad
00436F64 E8 01000000 call NgaMy.00436F6A ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 68 1D FD 41 00 58 89 30 8F 05 79 FC 41 00 8B 05 79 FC 41 00 FF 35 1D FD 41 00 56 89 1C 24 C7 04
24 38 3D 40 00 8B 34 24 8F 05 A5 FE 41 00 89 05 01 FF 41 00 FF 35 01 FF 41 00 89 1C 24 56 C7 04
24 45 FE 41 00 8F 05 31 FE 41 00
12.同步骤10和步骤11一样的操作，再来一次ESP，shift+F9运行一次
[Asm] 纯文本查看 复制代码 0043783F 8B1D 31FE4100 mov ebx,dword ptr ds:[41FE31] ; //落脚点
00437845 8933 mov dword ptr ds:[ebx],esi
00437847 8F05 39FC4100 pop dword ptr ds:[41FC39]
0043784D FF35 39FC4100 push dword ptr ds:[41FC39]
00437853 5B pop ebx
00437854 8F05 09FE4100 pop dword ptr ds:[41FE09]
0043785A 891D 21FC4100 mov dword ptr ds:[41FC21],ebx
00437860 FF35 21FC4100 push dword ptr ds:[41FC21]
00437866 C705 19FC4100 09FE4>mov dword ptr ds:[41FC19],NgaMy.0041FE09
00437870 8B1D 19FC4100 mov ebx,dword ptr ds:[41FC19]
00437876 8B33 mov esi,dword ptr ds:[ebx]
00437878 8F05 FDFB4100 pop dword ptr ds:[41FBFD]
0043787E 8B1D FDFB4100 mov ebx,dword ptr ds:[41FBFD]
00437884 FF15 45FE4100 call dword ptr ds:[41FE45]
0043788A 90 nop
0043788B 90 nop
0043788C 60 pushad
0043788D E8 01000000 call NgaMy.00437893 ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 8B 1D 31 FE 41 00 89 33 8F 05 39 FC 41 00 FF 35 39 FC 41 00 5B 8F 05 09 FE 41 00 89 1D 21 FC 41
00 FF 35 21 FC 41 00 C7 05 19 FC 41 00 09 FE 41 00 8B 1D 19 FC 41 00 8B 33 8F 05 FD FB 41 00 8B
1D FD FB 41 00 FF 15 45 FE 41 00
13.落脚后，还是二进制复制pushad上面的代码(记得清除硬件断点)，然后F4运行到pushad下一行，然后shift+F9，不过这次要多运行几次，找到和我们需要的代码长得差不多的。
[Asm] 纯文本查看 复制代码 0043813D 890D B1FD4100 mov dword ptr ds:[41FDB1],ecx ;//落脚点
00438143 FF35 B1FD4100 push dword ptr ds:[41FDB1]
00438149 8F05 B5FC4100 pop dword ptr ds:[41FCB5]
0043814F FF35 B5FC4100 push dword ptr ds:[41FCB5]
00438155 56 push esi
00438156 BE FDFC4100 mov esi,NgaMy.0041FCFD
0043815B 893E mov dword ptr ds:[esi],edi
0043815D 5E pop esi
0043815E FF35 FDFC4100 push dword ptr ds:[41FCFD]
00438164 68 94000000 push 94
00438169 8F05 E5FC4100 pop dword ptr ds:[41FCE5]
0043816F FF35 E5FC4100 push dword ptr ds:[41FCE5]
00438175 5F pop edi
00438176 893D 3DFE4100 mov dword ptr ds:[41FE3D],edi
0043817C FF35 3DFE4100 push dword ptr ds:[41FE3D]
00438182 8B0C24 mov ecx,dword ptr ss:[esp]
00438185 8F05 7DFE4100 pop dword ptr ds:[41FE7D]
0043818B 90 nop
0043818C 90 nop
0043818D 60 pushad
0043818E 50 push eax ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 89 0D B1 FD 41 00 FF 35 B1 FD 41 00 8F 05 B5 FC 41 00 FF 35 B5 FC 41 00 56 BE FD FC 41 00 89 3E
5E FF 35 FD FC 41 00 68 94 00 00 00 8F 05 E5 FC 41 00 FF 35 E5 FC 41 00 5F 89 3D 3D FE 41 00 FF
35 3D FE 41 00 8B 0C 24 8F 05 7D FE 41 00
14.同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，还是多运行几次
[Asm] 纯文本查看 复制代码 00438ACD 8B3C24 mov edi,dword ptr ss:[esp] ; //落脚点
00438AD0 8F05 79FD4100 pop dword ptr ds:[41FD79]
00438AD6 8935 25FC4100 mov dword ptr ds:[41FC25],esi
00438ADC FF35 25FC4100 push dword ptr ds:[41FC25]
00438AE2 890C24 mov dword ptr ss:[esp],ecx
00438AE5 8B3C24 mov edi,dword ptr ss:[esp]
00438AE8 8F05 B9FC4100 pop dword ptr ds:[41FCB9]
00438AEE 8F05 19FE4100 pop dword ptr ds:[41FE19]
00438AF4 8905 89FD4100 mov dword ptr ds:[41FD89],eax
00438AFA FF35 89FD4100 push dword ptr ds:[41FD89]
00438B00 57 push edi
00438B01 BF 19FE4100 mov edi,NgaMy.0041FE19
00438B06 8BC7 mov eax,edi
00438B08 5F pop edi
00438B09 8B08 mov ecx,dword ptr ds:[eax]
00438B0B 8F05 95FC4100 pop dword ptr ds:[41FC95]
00438B11 8B05 95FC4100 mov eax,dword ptr ds:[41FC95]
00438B17 53 push ebx
00438B18 90 nop
00438B19 90 nop
00438B1A 60 pushad
00438B1B 50 push eax ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 8B 3C 24 8F 05 79 FD 41 00 89 35 25 FC 41 00 FF 35 25 FC 41 00 89 0C 24 8B 3C 24 8F 05 B9 FC 41
00 8F 05 19 FE 41 00 89 05 89 FD 41 00 FF 35 89 FD 41 00 57 BF 19 FE 41 00 8B C7 5F 8B 08 8F 05
95 FC 41 00 8B 05 95 FC 41 00 53
15.同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，还是多运行几次
[Asm] 纯文本查看 复制代码 004393FF 8F05 5DFE4100 pop dword ptr ds:[41FE5D] ; //落脚点
00439405 FF35 5DFE4100 push dword ptr ds:[41FE5D]
0043940B 890C24 mov dword ptr ss:[esp],ecx
0043940E 893D 91FE4100 mov dword ptr ds:[41FE91],edi
00439414 FF35 91FE4100 push dword ptr ds:[41FE91]
0043941A 8F05 81FC4100 pop dword ptr ds:[41FC81]
00439420 891D 89FE4100 mov dword ptr ds:[41FE89],ebx
00439426 FF35 89FE4100 push dword ptr ds:[41FE89]
0043942C 68 81FC4100 push NgaMy.0041FC81
00439431 5B pop ebx
00439432 8B0B mov ecx,dword ptr ds:[ebx]
00439434 8F05 C9FC4100 pop dword ptr ds:[41FCC9]
0043943A 8B1D C9FC4100 mov ebx,dword ptr ds:[41FCC9]
00439440 57 push edi
00439441 890424 mov dword ptr ss:[esp],eax
00439444 890C24 mov dword ptr ss:[esp],ecx
00439447 8B0424 mov eax,dword ptr ss:[esp]
0043944A 90 nop
0043944B 90 nop
0043944C 60 pushad
0043944D 76 03 jbe short NgaMy.00439452 ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 8F 05 5D FE 41 00 FF 35 5D FE 41 00 89 0C 24 89 3D 91 FE 41 00 FF 35 91 FE 41 00 8F 05 81 FC 41
00 89 1D 89 FE 41 00 FF 35 89 FE 41 00 68 81 FC 41 00 5B 8B 0B 8F 05 C9 FC 41 00 8B 1D C9 FC 41
00 57 89 04 24 89 0C 24 8B 04 24
16.同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，还是多运行几次
[Asm] 纯文本查看 复制代码 00439D39 8F05 D5FD4100 pop dword ptr ds:[41FDD5] ; //落脚点
00439D3F 8B0C24 mov ecx,dword ptr ss:[esp]
00439D42 8F05 4DFC4100 pop dword ptr ds:[41FC4D]
00439D48 50 push eax
00439D49 891424 mov dword ptr ss:[esp],edx
00439D4C 8F05 BDFE4100 pop dword ptr ds:[41FEBD]
00439D52 FF35 BDFE4100 push dword ptr ds:[41FEBD]
00439D58 51 push ecx
00439D59 B9 DDFD4100 mov ecx,NgaMy.0041FDDD
00439D5E 8939 mov dword ptr ds:[ecx],edi
00439D60 59 pop ecx
00439D61 FF35 DDFD4100 push dword ptr ds:[41FDDD]
00439D67 C705 A9FE4100 60554>mov dword ptr ds:[41FEA9],NgaMy.00405560
00439D71 FF35 A9FE4100 push dword ptr ds:[41FEA9]
00439D77 8B3C24 mov edi,dword ptr ss:[esp]
00439D7A 8F05 95FD4100 pop dword ptr ds:[41FD95]
00439D80 891D 29FD4100 mov dword ptr ds:[41FD29],ebx
00439D86 90 nop
00439D87 90 nop
00439D88 60 pushad
00439D89 E8 01000000 call NgaMy.00439D8F ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 8F 05 D5 FD 41 00 8B 0C 24 8F 05 4D FC 41 00 50 89 14 24 8F 05 BD FE 41 00 FF 35 BD FE 41 00 51
B9 DD FD 41 00 89 39 59 FF 35 DD FD 41 00 C7 05 A9 FE 41 00 60 55 40 00 FF 35 A9 FE 41 00 8B 3C
24 8F 05 95 FD 41 00 89 1D 29 FD 41 00
17.我已经想吐了，同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，还是多运行几次
[Asm] 纯文本查看 复制代码 0043A6FB FF35 29FD4100 push dword ptr ds:[41FD29] ; //落脚点
0043A701 8BDF mov ebx,edi
0043A703 8BD3 mov edx,ebx
0043A705 5B pop ebx
0043A706 8F05 E9FE4100 pop dword ptr ds:[41FEE9]
0043A70C 8B3D E9FE4100 mov edi,dword ptr ds:[41FEE9]
0043A712 52 push edx
0043A713 891C24 mov dword ptr ss:[esp],ebx
0043A716 68 9DFE4100 push NgaMy.0041FE9D
0043A71B 5B pop ebx
0043A71C 8913 mov dword ptr ds:[ebx],edx
0043A71E 8B1C24 mov ebx,dword ptr ss:[esp]
0043A721 8F05 49FE4100 pop dword ptr ds:[41FE49]
0043A727 8B1424 mov edx,dword ptr ss:[esp]
0043A72A 8F05 69FD4100 pop dword ptr ds:[41FD69]
0043A730 FF15 9DFE4100 call dword ptr ds:[41FE9D]
0043A736 8965 E8 mov dword ptr ss:[ebp-18],esp
0043A739 8925 C5FD4100 mov dword ptr ds:[41FDC5],esp
0043A73F 891D 21FD4100 mov dword ptr ds:[41FD21],ebx
0043A745 FF35 21FD4100 push dword ptr ds:[41FD21]
0043A74B 60 pushad
0043A74C 74 03 je short NgaMy.0043A751 ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 FF 35 29 FD 41 00 8B DF 8B D3 5B 8F 05 E9 FE 41 00 8B 3D E9 FE 41 00 52 89 1C 24 68 9D FE 41 00
5B 89 13 8B 1C 24 8F 05 49 FE 41 00 8B 14 24 8F 05 69 FD 41 00 FF 15 9D FE 41 00 89 65 E8 89 25
C5 FD 41 00 89 1D 21 FD 41 00 FF 35 21 FD 41 00
18.同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，还是多运行几次
[Asm] 纯文本查看 复制代码 0043B097 68 C5FD4100 push NgaMy.0041FDC5 ; //落脚点
0043B09C 5B pop ebx
0043B09D 8B33 mov esi,dword ptr ds:[ebx]
0043B09F 8B1C24 mov ebx,dword ptr ss:[esp]
0043B0A2 8F05 A9FC4100 pop dword ptr ds:[41FCA9]
0043B0A8 893E mov dword ptr ds:[esi],edi
0043B0AA 57 push edi
0043B0AB 8F05 F5FE4100 pop dword ptr ds:[41FEF5]
0043B0B1 FF35 F5FE4100 push dword ptr ds:[41FEF5]
0043B0B7 893424 mov dword ptr ss:[esp],esi
0043B0BA FF15 BCA04000 call dword ptr ds:[40A0BC]
0043B0C0 8B4E 10 mov ecx,dword ptr ds:[esi+10]
0043B0C3 50 push eax
0043B0C4 B8 F9FB4100 mov eax,NgaMy.0041FBF9
0043B0C9 8910 mov dword ptr ds:[eax],edx
0043B0CB 58 pop eax
0043B0CC FF35 F9FB4100 push dword ptr ds:[41FBF9]
0043B0D2 56 push esi
0043B0D3 C70424 ACDE4000 mov dword ptr ss:[esp],NgaMy.0040DEAC
0043B0DA 8B1424 mov edx,dword ptr ss:[esp]
0043B0DD 8F05 ADFD4100 pop dword ptr ds:[41FDAD]
0043B0E3 890A mov dword ptr ds:[edx],ecx
0043B0E5 90 nop
0043B0E6 90 nop
0043B0E7 60 pushad
0043B0E8 E8 01000000 call NgaMy.0043B0EE ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 68 C5 FD 41 00 5B 8B 33 8B 1C 24 8F 05 A9 FC 41 00 89 3E 57 8F 05 F5 FE 41 00 FF 35 F5 FE 41 00
89 34 24 FF 15 BC A0 40 00 8B 4E 10 50 B8 F9 FB 41 00 89 10 58 FF 35 F9 FB 41 00 56 C7 04 24 AC
DE 40 00 8B 14 24 8F 05 AD FD 41 00 89 0A
19.同样复制pushad上面的代码，清除硬件断点，F4运行到pushad下一面一行ESP定律，这次只要运行一次就好了
[Asm] 纯文本查看 复制代码 0043B9DA 8F05 29FE4100 pop dword ptr ds:[41FE29] ; //落脚点
0043B9E0 FF35 29FE4100 push dword ptr ds:[41FE29]
0043B9E6 5A pop edx
0043B9E7 8B46 04 mov eax,dword ptr ds:[esi+4]
0043B9EA A3 B8DE4000 mov dword ptr ds:[40DEB8],eax
0043B9EF 8B56 08 mov edx,dword ptr ds:[esi+8]
0043B9F2 52 push edx
0043B9F3 8F05 3DFD4100 pop dword ptr ds:[41FD3D]
0043B9F9 FF35 3DFD4100 push dword ptr ds:[41FD3D]
0043B9FF 8F05 BCDE4000 pop dword ptr ds:[40DEBC]
0043BA05 8B76 0C mov esi,dword ptr ds:[esi+C]
0043BA08 81E6 FF7F0000 and esi,7FFF
0043BA0E 53 push ebx
0043BA0F BB 35FE4100 mov ebx,NgaMy.0041FE35
0043BA14 8933 mov dword ptr ds:[ebx],esi
0043BA16 5B pop ebx
0043BA17 FF35 35FE4100 push dword ptr ds:[41FE35]
0043BA1D 8F05 B0DE4000 pop dword ptr ds:[40DEB0]
0043BA23 90 nop
0043BA24 90 nop
0043BA25 60 pushad
0043BA26 E8 01000000 call NgaMy.0043BA2C ;//F4到这里，然后ESP
[Asm] 纯文本查看 复制代码 8F 05 29 FE 41 00 FF 35 29 FE 41 00 5A 8B 46 04 A3 B8 DE 40 00 8B 56 08 52 8F 05 3D FD 41 00 FF
35 3D FD 41 00 8F 05 BC DE 40 00 8B 76 0C 81 E6 FF 7F 00 00 53 BB 35 FE 41 00 89 33 5B FF 35 35
FE 41 00 8F 05 B0 DE 40 00
20.落脚点是一个大跳转，F8单步跟一次
[Asm] 纯文本查看 复制代码 0043BE77 /EB 01 jmp short NgaMy.0043BE7A ;//落脚点
0043BE79 |E8 FF25BCBE call BEFFE47D
0043BE7E 43 inc ebx
0043BE7F 0060 E8 add byte ptr ds:[eax-18],ah
0043BE82 0000 add byte ptr ds:[eax],al
0043BE84 0000 add byte ptr ds:[eax],al
0043BE86 5E pop esi
0043BE87 83EE 06 sub esi,6
0043BE8A B9 66000000 mov ecx,66
0043BE8F 29CE sub esi,ecx
0043BE91 BA 8A261D6A mov edx,6A1D268A
0043BE96 C1E9 02 shr ecx,2
0043BE99 83E9 02 sub ecx,2
0043BE9C 83F9 00 cmp ecx,0
21.程序来到这里，这就是跳向假的OEP的地方了
[Asm] 纯文本查看 复制代码 0043BE7A - FF25 BCBE4300 jmp dword ptr ds:[43BEBC] ; //跳到假的OEP
22.把被抽取的代码整合一下
[Asm] 纯文本查看 复制代码 89 15 F5 FD 41 00 FF 35 F5 FD 41 00 8F 05 2D FE 41 00 FF 35 2D FE 41 00 C7 04 24 60 00 00 00 56
89 0C 24 68 8D FD 41 00 59 89 19 8B 0C 24 8F 05 AD FE 41 00 FF 35 8D FD 41 00 C7 04 24 48 A2 40
00 89 05 B9 FD 41 00 FF 35 B9 FD 41 00 68 1D FD 41 00 58 89 30 8F 05 79 FC 41 00 8B 05 79 FC 41
00 FF 35 1D FD 41 00 56 89 1C 24 C7 04 24 38 3D 40 00 8B 34 24 8F 05 A5 FE 41 00 89 05 01 FF 41
00 FF 35 01 FF 41 00 89 1C 24 56 C7 04 24 45 FE 41 00 8F 05 31 FE 41 00 8B 1D 31 FE 41 00 89 33
8F 05 39 FC 41 00 FF 35 39 FC 41 00 5B 8F 05 09 FE 41 00 89 1D 21 FC 41 00 FF 35 21 FC 41 00 C7
05 19 FC 41 00 09 FE 41 00 8B 1D 19 FC 41 00 8B 33 8F 05 FD FB 41 00 8B 1D FD FB 41 00 FF 15 45
FE 41 00 89 0D B1 FD 41 00 FF 35 B1 FD 41 00 8F 05 B5 FC 41 00 FF 35 B5 FC 41 00 56 BE FD FC 41
00 89 3E 5E FF 35 FD FC 41 00 68 94 00 00 00 8F 05 E5 FC 41 00 FF 35 E5 FC 41 00 5F 89 3D 3D FE
41 00 FF 35 3D FE 41 00 8B 0C 24 8F 05 7D FE 41 00 8B 3C 24 8F 05 79 FD 41 00 89 35 25 FC 41 00
FF 35 25 FC 41 00 89 0C 24 8B 3C 24 8F 05 B9 FC 41 00 8F 05 19 FE 41 00 89 05 89 FD 41 00 FF 35
89 FD 41 00 57 BF 19 FE 41 00 8B C7 5F 8B 08 8F 05 95 FC 41 00 8B 05 95 FC 41 00 53 8F 05 5D FE
41 00 FF 35 5D FE 41 00 89 0C 24 89 3D 91 FE 41 00 FF 35 91 FE 41 00 8F 05 81 FC 41 00 89 1D 89
FE 41 00 FF 35 89 FE 41 00 68 81 FC 41 00 5B 8B 0B 8F 05 C9 FC 41 00 8B 1D C9 FC 41 00 57 89 04
24 89 0C 24 8B 04 24 8F 05 D5 FD 41 00 8B 0C 24 8F 05 4D FC 41 00 50 89 14 24 8F 05 BD FE 41 00
FF 35 BD FE 41 00 51 B9 DD FD 41 00 89 39 59 FF 35 DD FD 41 00 C7 05 A9 FE 41 00 60 55 40 00 FF
35 A9 FE 41 00 8B 3C 24 8F 05 95 FD 41 00 89 1D 29 FD 41 00 FF 35 29 FD 41 00 8B DF 8B D3 5B 8F
05 E9 FE 41 00 8B 3D E9 FE 41 00 52 89 1C 24 68 9D FE 41 00 5B 89 13 8B 1C 24 8F 05 49 FE 41 00
8B 14 24 8F 05 69 FD 41 00 FF 15 9D FE 41 00 89 65 E8 89 25 C5 FD 41 00 89 1D 21 FD 41 00 FF 35
21 FD 41 00 68 C5 FD 41 00 5B 8B 33 8B 1C 24 8F 05 A9 FC 41 00 89 3E 57 8F 05 F5 FE 41 00 FF 35
F5 FE 41 00 89 34 24 FF 15 BC A0 40 00 8B 4E 10 50 B8 F9 FB 41 00 89 10 58 FF 35 F9 FB 41 00 56
C7 04 24 AC DE 40 00 8B 14 24 8F 05 AD FD 41 00 89 0A 8F 05 29 FE 41 00 FF 35 29 FE 41 00 5A 8B
46 04 A3 B8 DE 40 00 8B 56 08 52 8F 05 3D FD 41 00 FF 35 3D FD 41 00 8F 05 BC DE 40 00 8B 76 0C
81 E6 FF 7F 00 00 53 BB 35 FE 41 00 89 33 5B FF 35 35 FE 41 00 8F 05 B0 DE 40 00
23.使用工具新建一个区段，ximo教程中使用的是topo.exe，打开该工具，浏览选中刚刚脱壳后的程序，然后数一下整合好的字节数，将字节数填入工具中(最好自己估摸着输入一个大于整合好代码字节数的数字)，单击执行，执行完之后记录下工具中显示的内存地址，这个地址就是新增区段的起始地址
[Asm] 纯文本查看 复制代码 记录下的地址：0043E000
24.OD载入新topo处理过的程序，载入后跟随表达式，地址填写记录下的地址，也就是"0043E000".跟随过去之后将整合好的代码粘贴到OD中nop的位置上去。
25.然后在粘贴好的代码下面一行输入汇编命令"jmp 0040305C"，这个地址也就是假的OEP地址。这些操作都做完之后保存文件(选中这些新增代码右键----复制到可执行文件--选择部分---右键--保存文件)
26.文件保存好后还需要进行最后一步，就是用loadPE打开保存好的文件，把入口点改为0043E000-00400000也就是3E000，为什么减00400000这个大家应该懂得，就不在解释了，改完后记得保存一下。至此这个壳就算脱掉了。虽然使用peid查壳查不出来，但是确确实实是脱掉了。
| 
发表于 2015-11-17 01:07
|
发表于 2015-11-17 09:40
