Cracking Microsoft FrontPage 3.0.1.726
and
Microsoft Image Composer 1.5
(Let's crack Micro$oft to the bones!)

by +Sync


(19 August 1997)

Courtesy of Reverser's page of reverse engineering

Well, another outstanding essay from +Sync! There is a lot of code, here, but everything is clear and you just need to peruse this essay slowly, tasting quietly Micro$oft's stupidity... gee! I love this section as much as +Sync does!

Cracking Microsoft FrontPage 3.0.1.726 and Image Composer 1.5 By +Sync
Well, I saw this and I had to jump on it. I can't say how happy I am to be contributing to the destruction of Micro$oft. They are offering FrontPage 98 for download on their website. If you would rather go straight to downloading and skip registering yourself with Micro$oft then go to: http://www.microsoft.com/frontpage/download/pick_default.htm You'll notice very quickly that it is over 20 MB in size. We are beginning to expect this sort of thing from them. This crack is very straightforward. I offer this crack simply so that nobody out there pays a dime to Micro$oft to use this program, they have enough already. I did not tear out the insides of the protection, as it was not necessary. Here is how I did it. First run the program as usual and see how it behaves. Next set your system date ahead past the end of the evaluation period. You'll get a nasty screen telling you that you are out of the evalutation period and that they would be happy to give you the location of the nearest reseller of the full version. Then it kicks you out. Okay, so set your system date back and run again, it still says you're a bad guy. So it saves the fact that your eval period is over somewhere, probably in the registry. At this point I fully intended to trace the registry calls and figure out what this target was doing there, but it turned out to be unnecessary. I followed the BMSG approach outlined in +Orc's Lesson 9, with WinIce. I quickly discovered that the nag window is opened by FP30CUTIL.DLL which is found in the /BIN directory. So next, I break out WDASM 8.9 and search for 'expired'. Bingo, found along with all the rest of the text from the nag window. Look up from here in the dead listing, and you'll find a conditional jmp, at 67B2CEC9, which is referenced in two places, 67B2CD1F and 67B2CD28. So let's look at that code, it's shown below. Note that the references to 'Expired_FLag' refer to some indicator that you are beyond your eval period unrelated to the sytem date (but probably in the registry). * Reference To: MFC42.MFC42:NoName0197, Ord:0DC1h | :67B2CD05 E890430200 Call 67B5109A ;sets AX=1 if Expired_Flag is set :67B2CD0A 51 push ecx :67B2CD0B 8B4DEC mov ecx, dword ptr [ebp-14] :67B2CD0E 8945C4 mov dword ptr [ebp-3C], eax ;Store Expired_Flag in [ebp-3c] :67B2CD11 8BC4 mov eax, esp :67B2CD13 8908 mov dword ptr [eax], ecx :67B2CD15 8D4DD8 lea ecx, dword ptr [ebp-28] :67B2CD18 E8E9020000 call 67B2D006 ;returns AX=1 if system clock is past 1997 :67B2CD1D 3BC3 cmp eax,ebx ;Is Ax=0 ? :67B2CD1F 0F85A4010000 jne 67B2CEC9 ;No Jump to Bad Guy Code :67B2CD25 395DC4 cmp dword ptr [ebp-3C], ebx ;Is Expired_Flag Set ? :67B2CD28 0F859B010000 jne 67B2CEC9 ;Yes, Jump to Bad Guy Code :67B2CD2E 51 push ecx :67B2CD2F 8B4DDC mov ecx, dword ptr [ebp-24] :67B2CD32 8BC4 mov eax, esp :67B2CD34 8908 mov dword ptr [eax], ecx :67B2CD36 8D4DD8 lea ecx, dword ptr [ebp-28] :67B2CD39 E8C8020000 call 67B2D006 ;Returns AX=1 if system clock is past 1997 :67B2CD3E 3BC3 cmp eax, ebx ;System Date OK? (again) :67B2CD40 0F846E010000 je 67B2CEB4 ;Yes, jump over bad code :67B2CD46 8D4DF4 lea ecx, dword ptr [ebp-0C] ;no, let's nag luser :67B2CD49 E8DE3E0200 Call 67B50C2C ;->MFC42:NoName000 :67B2CD4E 53 push ebx :67B2CD4F 8D4DEC lea ecx, dword ptr [ebp-14] :67B2CD52 66895DC8 mov word ptr [ebp-38], bx :67B2CD56 66895DCA mov word ptr [ebp-36], bx :67B2CD5A 66895DCC mov word ptr [ebp-34], bx :67B2CD5E 66895DCE mov word ptr [ebp-32], bx :67B2CD62 66895DD0 mov word ptr [ebp-30], bx :67B2CD66 66895DD2 mov word ptr [ebp-2E], bx :67B2CD6A 66895DD4 mov word ptr [ebp-2C], bx :67B2CD6E 66895DD6 mov word ptr [ebp-2A], bx :67B2CD72 E81D430200 Call 67B51094 ;-> MFC42:NoName0196 :67B2CD77 8B4014 mov eax, dword ptr [eax+14] :67B2CD7A 53 push ebx :67B2CD7B 056C070000 add eax, 0000076C :67B2CD80 8D4DEC lea ecx, dword ptr [ebp-14] :67B2CD83 668945C8 mov word ptr [ebp-38], ax :67B2CD87 E808430200 Call 67B51094 ;->MFC42:NoName0196 :67B2CD8C 8B4010 mov eax, dword ptr [eax+10] :67B2CD8F 53 push ebx :67B2CD90 40 inc eax :67B2CD91 8D4DEC lea ecx, dword ptr [ebp-14] :67B2CD94 668945CA mov word ptr [ebp-36], ax :67B2CD98 E8F7420200 Call 67B51094 ;->MFC42:NoName0196 :67B2CD9D 8B400C mov eax, dword ptr [eax+0C] :67B2CDA0 6A7F push 0000007F :67B2CDA2 6880000000 push 00000080 :67B2CDA7 8D4DF4 lea ecx, dword ptr [ebp-0C] :67B2CDAA 668945CE mov word ptr [ebp-32], ax :67B2CDAE E845420200 Call 67B50FF8 ;->MFC42:NoName017 :67B2CDB3 50 push eax :67B2CDB4 8D45C8 lea eax, dword ptr [ebp-38] :67B2CDB7 53 push ebx :67B2CDB8 50 push eax :67B2CDB9 6A02 push 00000002 :67B2CDBB 6800040000 push 00000400 :67B2CDC0 FF15A811B267 Call dword ptr [67B211A8] ;->KERNEL32.GetDateFormatA, :67B2CDC6 6AFF push FFFFFFFF :67B2CDC8 8D4DF4 lea ecx, dword ptr [ebp-0C] :67B2CDCB E88C3E0200 Call 67B50C5C ;->MFC42:NoName0013 :67B2CDD0 53 push ebx :67B2CDD1 8D8DB0FEFFFF lea ecx, dword ptr [ebp+FFFFFEB0] :67B2CDD7 E8B3C70100 call 67B4958F :67B2CDDC 381D7054B567 cmp byte ptr [67B55470], bl :67B2CDE2 743D je 67B2CE21 :67B2CDE4 8D4DFC lea ecx, dword ptr [ebp-04] :67B2CDE7 E8403E0200 Call 67B50C2C ;->MFC42:NoName0005 * Reference to "Your beta version of %1 is going to expire on %2. Now is the" | :67B2CDEC 6838080000 push 00000838 :67B2CDF1 8D4DFC lea ecx, dword ptr [ebp-04] :67B2CDF4 E875220100 call 67B3F06E ;-> fp30cutl.ExpFn0251 :67B2CDF9 8B45F4 mov eax, dword ptr [ebp-0C] :67B2CDFC 6A02 push 00000002 :67B2CDFE 8945E4 mov dword ptr [ebp-1C], eax :67B2CE01 8D45E0 lea eax, dword ptr [ebp-20] :67B2CE04 50 push eax :67B2CE05 8D8560FFFFFF lea eax, dword ptr [ebp+FFFFFF60] :67B2CE0B FF75FC push [ebp-04] :67B2CE0E BE7454B567 mov esi, 67B55474 ;StringData ->"FrontPage 98" :67B2CE13 8975E0 mov dword ptr [ebp-20], esi :67B2CE16 50 push eax :67B2CE17 E872420200 Call 67B5108E ;->MFC42:NoName0195 :67B2CE1C 8D4DFC lea ecx, dword ptr [ebp-04] :67B2CE1F EB3B jmp 67B2CE5C * Referenced by a Jump at Address:67B2CDE2(C) | :67B2CE21 8D4DFC lea ecx, dword ptr [ebp-04] :67B2CE24 E8033E0200 Call 67B50C2C ;->MFC42:NoName0005 * Reference "Your evaluation copy of %1 is going to expire on %2. Now is " | :67B2CE29 683D080000 push 0000083D :67B2CE2E 8D4DFC lea ecx, dword ptr [ebp-04] :67B2CE31 E838220100 call 67B3F06E ;->fp30cutl.ExpFn025 :67B2CE36 8B45F4 mov eax, dword ptr [ebp-0C] :67B2CE39 6A02 push 00000002 :67B2CE3B 8945E4 mov dword ptr [ebp-1C], eax :67B2CE3E 8D45E0 lea eax, dword ptr [ebp-20] :67B2CE41 50 push eax :67B2CE42 8D8560FFFFFF lea eax, dword ptr [ebp+FFFFFF60] :67B2CE48 FF75FC push [ebp-04] :67B2CE4B BE7454B567 mov esi, 67B55474 ;StringData ->"FrontPage 98" :67B2CE50 8975E0 mov dword ptr [ebp-20], esi :67B2CE53 50 push eax :67B2CE54 E835420200 Call 67B5108E ;->MFC42:NoName019 :67B2CE59 8D4DFC lea ecx, dword ptr [ebp-04] * Referenced by a Jump at Address:67B2CE1F(U) :67B2CE5C E8073E0200 Call 67B50C68 ;->MFC42:NoName0015 :67B2CE61 8D4DF8 lea ecx, dword ptr [ebp-08] :67B2CE64 E8C33D0200 Call 67B50C2C ;->MFC42:NoName0005 * Reference "If you would like to find out about resellers in your area, " | :67B2CE69 6837080000 push 00000837 :67B2CE6E 8D4DF8 lea ecx, dword ptr [ebp-08] :67B2CE71 E8F8210100 call 67B3F06E ;->fp30cutl.ExpFn0251() :67B2CE76 8D45E0 lea eax, dword ptr [ebp-20] :67B2CE79 6A01 push 00000001 :67B2CE7B 50 push eax :67B2CE7C 8D8564FFFFFF lea eax, dword ptr [ebp+FFFFFF64] :67B2CE82 FF75F8 push [ebp-08] :67B2CE85 8975E0 mov dword ptr [ebp-20], esi :67B2CE88 50 push eax :67B2CE89 E800420200 Call 67B5108E ;->MFC42:NoName0195 :67B2CE8E 8D8DB0FEFFFF lea ecx, dword ptr [ebp+FFFFFEB0] :67B2CE94 E814C90100 call 67B497AD :67B2CE99 8D4DF8 lea ecx, dword ptr [ebp-08] :67B2CE9C E8C73D0200 Call 67B50C68 ;->MFC42:NoName0015 :67B2CEA1 8D8DB0FEFFFF lea ecx, dword ptr [ebp+FFFFFEB0] :67B2CEA7 E868010000 call 67B2D014 :67B2CEAC 8D4DF4 lea ecx, dword ptr [ebp-0C] :67B2CEAF E8B43D0200 Call 67B50C68 ;->MFC42:NoName0015 * Referenced by a Jump at Address:67B2CD40(C) | :67B2CEB4 8D4DF0 lea ecx, dword ptr [ebp-10] :67B2CEB7 891D6054B567 mov dword ptr [67B55460], ebx :67B2CEBD E8A63D0200 Call 67B50C68 ;->MFC42:NoName0015 * Referenced by a Jump at Address:67B2CC7C(U) | :67B2CEC2 33C0 xor eax, eax ;Good guy lands here :67B2CEC4 E92D010000 jmp 67B2CFF6 ;and jmps again over bad stuff * Referenced by a Jump at Addresses:67B2CD1F(C), :67B2CD28(C) | :67B2CEC9 53 push ebx ;You don't want to be here! :67B2CECA 8D8DB0FEFFFF lea ecx, dword ptr [ebp+FFFFFEB0] :67B2CED0 E8BAC60100 call 67B4958F So, patching it is simple, we just force to jumps to always indicate the system dat is ok and Expired_Flag is false. Here is what I did. Change: :67B2CD18 E8E9020000 call 67B2D006 ; AX=1 if system clock past 1997 :67B2CD1D 3BC3 cmp eax,ebx ;Is Ax=0 :67B2CD1F 0F85A4010000 jne 67B2CEC9 ;No Jump to Bad Guy Code To: :67B2CD18 E8E9020000 call 67B2D006 ; AX=1 if system clock past 1997 :67B2CD1D 3BC3 cmp eax,ebx ;Is Ax=0 :67B2CD1F EB0D jmp 67B2CD2E ;Just Jmp over the crap Of course there are a million ways you could have patched it, I just prefer to patch only 1 place in possible. But this is very nice. Micro$oft was kind enough to put the check into a dll, so all three executables will run perfectly, now and for forever, and we did not need to fish out the insides of many of the calls to do it. That's it, quick and dirty. Enjoy, and Crack Micro$oft to the bones. But wait, why stop at just this program. Go ahead and download Micro$oft Image Composer as well. It's just as easy, maybe even a little easier. This time let's use WinIce a little more. Load up the file IMGCOMP.EXE into Symbol Loader and do a BPX GetSystemTime (make sure you have loaded the appropriate exports in Winice.Dat). Then hit F5 and run. When it breaks into SoftIce do a few P Ret's (F12) until you return to IMGCOMP code. You will be just under the call shown below. * Referenced by a Jump at Addresses:00416A2E(C), :00416A4C(C), :00416A55(C) | :0044ADB1 8B9424E0000000 mov edx, dword ptr [esp+000000E0] :0044ADB8 6AFF push FFFFFFFF :0044ADBA 6A00 push 00000000 :0044ADBC 52 push edx :0044ADBD E889280300 Call 0047D64B ;->MFC42:NoName0316 :0044ADC2 83FE03 cmp esi, 00000003 ;You land Here :0044ADC5 7D13 jge 0044ADDA :0044ADC7 6A03 push 00000003 Well, we obviously don't want this call to be made. Looking up, we see it is referenced by jumps at 3 locations. So let's fix those three spots so that they do not jump here. Location 1 :00416A21 E88BE5FEFF Call 00404FB1 ;MFC42:NoName0112 :00416A26 8BF0 mov esi, eax :00416A28 8B442414 mov eax, dword ptr [esp+14] :00416A2C 85C0 test eax, eax :00416A2E 0F857D430300 jne 0044ADB1 Location 2 :00416A45 E89B000000 call 00416AE5 :00416A4A 85C0 test eax, eax :00416A4C 0F855F430300 jne 0044ADB1 Location 3 :00416A55 0F8D56430300 jnl 0044ADB1 So Let's patch 'em up. Location 1 Change: :00416A2E 0F857D430300 jne 0044ADB1 To: 404040484848 inc ax ,inc ax, inc ax, dec ax, dec ax,dec ax Location 2 Change: :00416A4C 0F855F430300 jne 0044ADB1 To: 404040484848 same as location 1 Location 3 Change: :00416A55 0F8D56430300 jnl 0044ADB1 To: 404040484848 same as above Okay, now run it. You get a nag telling you you have 1 day left of evaluation. Well, the program is cracked, but we don't like the nag. Do the same as above, BMSG on the window handle and P RET back to IMGCOMP code. You end up at 44AD82 shown below. * Referenced by only one Jump at Address:00416A6F(C) | :0044AD02 8D4C2410 lea ecx, dword ptr [esp+10] :0044AD06 E8D565FBFF Call 004012E0 ;->MFC42:NoName0089 :0044AD0B 8D4C2424 lea ecx, dword ptr [esp+24] :0044AD0F C78424CC00000000000000 mov dword ptr [esp+000000CC], 00000000 :0044AD1A E8C165FBFF Call 004012E0 ;->MFC42:NoName0089 :0044AD1F 8B4C242C mov ecx, dword ptr [esp+2C] :0044AD23 8B44241C mov eax, dword ptr [esp+1C] :0044AD27 2BC8 sub ecx, eax :0044AD29 B807452EC2 mov eax, C22E4507 :0044AD2E 81C17F510100 add ecx, 0001517F :0044AD34 C68424CC00000001 mov byte ptr [esp+000000CC], 01 :0044AD3C F7E9 imul ecx :0044AD3E 03D1 add edx, ecx :0044AD40 C1FA10 sar edx, 10 :0044AD43 8BC2 mov eax, edx :0044AD45 C1E81F shr eax, 1F :0044AD48 03D0 add edx, eax :0044AD4A 8BF2 mov esi, edx :0044AD4C 85F6 test esi, esi :0044AD4E 7F05 jg 0044AD55 :0044AD50 BE01000000 mov esi, 00000001 * Referenced by a Jump at Address:0044AD4E(C) | :0044AD55 8B8C24F0000000 mov ecx, dword ptr [esp+000000F0] :0044AD5C 51 push ecx :0044AD5D 8D4C2414 lea ecx, dword ptr [esp+14] :0044AD61 E88665FBFF call 004012EC :0044AD66 8B542410 mov edx, dword ptr [esp+10] :0044AD6A 56 push esi :0044AD6B 8D442428 lea eax, dword ptr [esp+28] :0044AD6F 52 push edx :0044AD70 50 push eax :0044AD71 E8D97CFBFF Call 00402A4F ;->MFC42:NoName0087 :0044AD76 8B4C2430 mov ecx, dword ptr [esp+30] :0044AD7A 83C40C add esp, 0000000C :0044AD7D 6A00 push 00000000 :0044AD7F 6A00 push 00000000 :0044AD81 51 push ecx * Reference To: MFC42.MFC42:NoName0212, Ord:04B0h | :0044AD82 E816280300 Call 0047D59D ;This call puts up NAG :0044AD87 8D4C2424 lea ecx, dword ptr [esp+24] ;You land HERE This code is referenced 1 time at 416a6f, as shown below, with the patch. Change: :00416A68 E878000000 call 00416AE5 :00416A6D 85C0 test eax, eax :00416A6F 0F858D420300 jne 0044AD02 To: :00416A68 E878000000 call 00416AE5 :00416A6D 85C0 test eax, eax :00416A6F 404040484848 3 inc eax + 3 dec eax That's it. Micro$ft Image Composer is now yours forever. Please continue the fight against Micro$oft, if we do not win - then we all loose. One final note. isn't it interesting how these MFC programs, which were written in 'high' level languages with little or no effort, can be cracked with little or no effort as well? +Sync
(c) +Sync 1997. All rights reserved
You are deep inside reverser's page of reverse engineering, choose your way out:

project 9
homepage links red anonymity +ORC students' essays academy database
tools cocktails antismut CGI-scripts search_forms mail_fravia
Is reverse engineering illegal?