螢幕錄影專家 v5.0 註冊碼破解
【破文標題】 螢幕錄影專家 v5.0 註冊碼破解分析
【破文作者】 80x86
【作者郵箱】 80x86@sohu.com
【使用工具】 Ollydbg,IDA
【破解平臺】 XP
【軟體名稱】 螢幕錄影專家
【下載地址】 http://download.enet.com.cn/html/040312003020601.html
【破解內容】
00437D20 /. 55 push ebp
00437D21 |. 8BEC mov ebp,esp
00437D23 |. 81C4 CCFEFFFF add esp,-134
00437D29 |. 53 push ebx
00437D2A |. 8995 44FFFFFF mov dword ptr ss:[ebp-BC],edx
00437D30 |. 8985 48FFFFFF mov dword ptr ss:[ebp-B8],eax
00437D36 |. B8 FCBA5000 mov eax,屏錄專家.0050BAFC
00437D3B |. E8 60440A00 call <屏錄專家.@__InitExceptBlockLDTC>
00437D40 |. 66:C785 5CFFFFFF 0800 mov word ptr ss:[ebp-A4],8
00437D49 |. 8D45 FC lea eax,dword ptr ss:[ebp-4]
00437D4C |. E8 BF9BFCFF call <屏錄專家.unknown_libname_37>
00437D51 |. 8BD0 mov edx,eax
00437D53 |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437D59 |. 8B8D 48FFFFFF mov ecx,dword ptr ss:[ebp-B8]
00437D5F |. 8B81 E4020000 mov eax,dword ptr ds:[ecx+2E4]
00437D65 |. E8 1E860500 call <屏錄專家.@TControl@GetText$qqrv> ;取註冊碼
00437D6A |. 8D55 FC lea edx,dword ptr ss:[ebp-4] ;**edx->註冊碼
00437D6D |. FF32 push dword ptr ds:[edx]
00437D6F |. 8D45 F8 lea eax,dword ptr ss:[ebp-8]
00437D72 |. E8 999BFCFF call <屏錄專家.unknown_libname_37>
00437D77 |. 8BD0 mov edx,eax
00437D79 |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437D7F |. 8B8D 48FFFFFF mov ecx,dword ptr ss:[ebp-B8]
00437D85 |. 8B81 DC020000 mov eax,dword ptr ds:[ecx+2DC]
00437D8B |. E8 F8850500 call <屏錄專家.@TControl@GetText$qqrv> ;取註冊名
00437D90 |. 8D55 F8 lea edx,dword ptr ss:[ebp-8] ;**edx->註冊名
00437D93 |. FF32 push dword ptr ds:[edx]
00437D95 |. FFB5 48FFFFFF push dword ptr ss:[ebp-B8]
00437D9B |. E8 180C0000 call <屏錄專家.old_ver> ;關於老版本
00437DA0 |. 83C4 0C add esp,0C
00437DA3 |. 3C 01 cmp al,1
00437DA5 |. 0F94C1 sete cl
00437DA8 |. 83E1 01 and ecx,1
00437DAB |. 51 push ecx
00437DAC |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437DB2 |. 8D45 F8 lea eax,dword ptr ss:[ebp-8]
00437DB5 |. BA 02000000 mov edx,2
00437DBA |. E8 11F70A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00437DBF |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437DC5 |. 8D45 FC lea eax,dword ptr ss:[ebp-4]
00437DC8 |. BA 02000000 mov edx,2
00437DCD |. E8 FEF60A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00437DD2 |. 59 pop ecx
00437DD3 |. 84C9 test cl,cl
00437DD5 |. 74 48 je short 屏錄專家.00437E1F ;不是老版本
00437DD7 |. 66:C785 5CFFFFFF 1400 mov word ptr ss:[ebp-A4],14 ;註冊碼是老版本
00437DE0 |. BA DCB75000 mov edx,屏錄專家.0050B7DC
00437DE5 |. 8D45 F4 lea eax,dword ptr ss:[ebp-C]
00437DE8 |. E8 ABF40A00 call <屏錄專家.sub_4E7298>
00437DED |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437DF3 |. 8B00 mov eax,dword ptr ds:[eax]
00437DF5 |. E8 46310500 call <屏錄專家.@Dialogs@ShowMessage$qqrx17System@AnsiString>
00437DFA |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437E00 |. 8D45 F4 lea eax,dword ptr ss:[ebp-C]
00437E03 |. BA 02000000 mov edx,2
00437E08 |. E8 C3F60A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00437E0D |. 8B8D 4CFFFFFF mov ecx,dword ptr ss:[ebp-B4]
00437E13 |. 64:890D 00000000 mov dword ptr fs:[0],ecx
00437E1A |. E9 7E0B0000 jmp 屏錄專家.0043899D ;返回
不是老版本:
00437E1F |> 6A 14 push 14
00437E21 |. 6A 00 push 0
00437E23 |. 8D85 00FFFFFF lea eax,dword ptr ss:[ebp-100]
00437E29 |. 50 push eax
00437E2A |. E8 A13F0A00 call <屏錄專家._memset>
00437E2F |. 83C4 0C add esp,0C
00437E32 |. 33D2 xor edx,edx
00437E34 |. 8995 40FFFFFF mov dword ptr ss:[ebp-C0],edx
00437E3A |. 6A 14 push 14
00437E3C |. 6A 00 push 0
00437E3E |. 8D8D 18FFFFFF lea ecx,dword ptr ss:[ebp-E8]
00437E44 |. 51 push ecx
00437E45 |. E8 863F0A00 call <屏錄專家._memset>
00437E4A |. 83C4 0C add esp,0C
00437E4D |. 6A 14 push 14
00437E4F |. 6A 00 push 0
00437E51 |. 8D85 E8FEFFFF lea eax,dword ptr ss:[ebp-118]
00437E57 |. 50 push eax
00437E58 |. E8 733F0A00 call <屏錄專家._memset>
00437E5D |. 83C4 0C add esp,0C
00437E60 |. 66:C785 5CFFFFFF 2000 mov word ptr ss:[ebp-A4],20
00437E69 |. 8D45 F0 lea eax,dword ptr ss:[ebp-10]
00437E6C |. E8 9F9AFCFF call <屏錄專家.unknown_libname_37>
00437E71 |. 8BD0 mov edx,eax
00437E73 |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437E79 |. 8B8D 48FFFFFF mov ecx,dword ptr ss:[ebp-B8]
00437E7F |. 8B81 DC020000 mov eax,dword ptr ds:[ecx+2DC]
00437E85 |. E8 FE840500 call <屏錄專家.@TControl@GetText$qqrv> ;取註冊名
00437E8A |. 8D45 F0 lea eax,dword ptr ss:[ebp-10]
**eax->取註冊名
00437E8D |. E8 46DEFCFF call <屏錄專家.@System@AnsiString@c_str$xqqrv>
00437E92 |. 50 push eax
00437E93 |. 8D95 E8FEFFFF lea edx,dword ptr ss:[ebp-118]
00437E99 |. 52 push edx
00437E9A |. E8 5D400A00 call <屏錄專家._strcpy> ;copy 註冊名
00437E9F |. 83C4 08 add esp,8
00437EA2 |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437EA8 |. 8D45 F0 lea eax,dword ptr ss:[ebp-10]
00437EAB |. BA 02000000 mov edx,2
00437EB0 |. E8 1BF60A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00437EB5 |. 66:C785 5CFFFFFF 2C00 mov word ptr ss:[ebp-A4],2C
00437EBE |. 8D45 EC lea eax,dword ptr ss:[ebp-14]
00437EC1 |. E8 4A9AFCFF call <屏錄專家.unknown_libname_37>
00437EC6 |. 8BD0 mov edx,eax
00437EC8 |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437ECE |. 8B8D 48FFFFFF mov ecx,dword ptr ss:[ebp-B8]
00437ED4 |. 8B81 F0020000 mov eax,dword ptr ds:[ecx+2F0]
00437EDA |. E8 A9840500 call <屏錄專家.@TControl@GetText$qqrv> ;取機器碼
00437EDF |. 8D45 EC lea eax,dword ptr ss:[ebp-14]
;**eax->機器碼
00437EE2 |. E8 F1DDFCFF call <屏錄專家.@System@AnsiString@c_str$xqqrv>
00437EE7 |. 50 push eax
00437EE8 |. 8D95 00FFFFFF lea edx,dword ptr ss:[ebp-100]
00437EEE |. 52 push edx
00437EEF |. E8 08400A00 call <屏錄專家._strcpy> ;copy 機器碼
00437EF4 |. 83C4 08 add esp,8
00437EF7 |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437EFD |. 8D45 EC lea eax,dword ptr ss:[ebp-14]
00437F00 |. BA 02000000 mov edx,2
00437F05 |. E8 C6F50A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00437F0A |. 33C9 xor ecx,ecx
00437F0C |. 898D 3CFFFFFF mov dword ptr ss:[ebp-C4],ecx
;*********************************************************************************************************
00437F12 |> 8B85 3CFFFFFF /mov eax,dword ptr ss:[ebp-C4]
00437F18 |. 8A9405 E8FEFFFF |mov dl,byte ptr ss:[ebp+eax-118] ;[ebp+eax-118]=註冊名
00437F1F |. 8B8D 3CFFFFFF |mov ecx,dword ptr ss:[ebp-C4]
00437F25 |. 32940D 00FFFFFF |xor dl,byte ptr ss:[ebp+ecx-100] ;[ebp+ecx-100h]=機器碼
00437F2C |. 8B85 3CFFFFFF |mov eax,dword ptr ss:[ebp-C4]
00437F32 |. 889405 18FFFFFF |mov byte ptr ss:[ebp+eax-E8],dl
00437F39 |. 8B95 3CFFFFFF |mov edx,dword ptr ss:[ebp-C4]
00437F3F |. 0FBE8C15 18FFFFFF |movsx ecx,byte ptr ss:[ebp+edx-E8]
00437F47 |. 898D CCFEFFFF |mov dword ptr ss:[ebp-134],ecx
00437F4D |. DB85 CCFEFFFF |fild dword ptr ss:[ebp-134]
00437F53 |. 83C4 F8 |add esp,-8
00437F56 |. DD1C24 |fstp qword ptr ss:[esp]
00437F59 |. E8 02840A00 |call <屏錄專家._fabs> ;st=|[ebp-134h]|
00437F5E |. 83C4 08 |add esp,8
00437F61 |. DB85 3CFFFFFF |fild dword ptr ss:[ebp-C4] ;st=[ebp-0C4h]
00437F67 |. DEC9 |fmulp st(1),st ; st=|[ebp-134h]|*[ebp-0C4h]
00437F69 |. DB85 40FFFFFF |fild dword ptr ss:[ebp-C0] ;st=[ebp-0C0h]
00437F6F |. DEC1 |faddp st(1),st ; st=|[ebp-134h]|*[ebp-0C4h]+[ebp-0C0h]
00437F71 |. E8 12840A00 |call <屏錄專家.@_ftol$qv> ; eax=st
00437F76 |. 8985 40FFFFFF |mov dword ptr ss:[ebp-C0],eax
00437F7C |. FF85 3CFFFFFF |inc dword ptr ss:[ebp-C4]
00437F82 |. 83BD 3CFFFFFF 14 |cmp dword ptr ss:[ebp-C4],14 ;20位
00437F89 |.^ 7C 87 \jl short 屏錄專家.00437F12
;假設這段程式輸出為temp_H
static char n[14]="ABABABAB"//註冊名
static char m[14]="92388863"//機器碼
int count;
int temp_H;
temp_H=0;
for count=0 to 14h do
{
temp_H=|n[count] xor m[count]|*count+temp_H
}
;*********************************************************************************************************
00437F8B |. 8185 40FFFFFF 39300000 add dword ptr ss:[ebp-C0],3039
00437F95 |. FFB5 40FFFFFF push dword ptr ss:[ebp-C0]
00437F9B |. 68 57B85000 push 屏錄專家.0050B857
00437FA0 |. 8D95 18FFFFFF lea edx,dword ptr ss:[ebp-E8]
00437FA6 |. 52 push edx
00437FA7 |. E8 F8690A00 call <屏錄專家._sprintf> ;把temp_H轉為十進位制temp_D
(十六進)temp_H------->(十進位制)temp_D
;*********************************************************************************************************
00437FAC |. 83C4 0C add esp,0C
00437FAF |. 66:C785 5CFFFFFF 3800 mov word ptr ss:[ebp-A4],38
00437FB8 |. 8D45 E8 lea eax,dword ptr ss:[ebp-18]
00437FBB |. E8 5099FCFF call <屏錄專家.unknown_libname_37>
00437FC0 |. 8BD0 mov edx,eax
00437FC2 |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
00437FC8 |. 8B8D 48FFFFFF mov ecx,dword ptr ss:[ebp-B8]
00437FCE |. 8B81 E4020000 mov eax,dword ptr ds:[ecx+2E4]
00437FD4 |. E8 AF830500 call <屏錄專家.@TControl@GetText$qqrv> ;取註冊碼
00437FD9 |. 8D45 E8 lea eax,dword ptr ss:[ebp-18]
;**EAX-> 註冊碼
00437FDC |. E8 F7DCFCFF call <屏錄專家.@System@AnsiString@c_str$xqqrv>
00437FE1 |. 50 push eax
00437FE2 |. 8D95 D0FEFFFF lea edx,dword ptr ss:[ebp-130]
00437FE8 |. 52 push edx
00437FE9 |. E8 0E3F0A00 call <屏錄專家._strcpy> ;COPY 取註冊碼
00437FEE |. 83C4 08 add esp,8
00437FF1 |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
00437FF7 |. 8D45 E8 lea eax,dword ptr ss:[ebp-18]
00437FFA |. BA 02000000 mov edx,2
00437FFF |. E8 CCF40A00 call <屏錄專家.@System@AnsiString@$bdtr$qqrv>
00438004 |. 33C9 xor ecx,ecx
00438006 |. 898D 3CFFFFFF mov dword ptr ss:[ebp-C4],ecx
0043800C |> 8B85 3CFFFFFF /mov eax,dword ptr ss:[ebp-C4]
00438012 |. 0FBE9405 18FFFFFF |movsx edx,byte ptr ss:[ebp+eax-E8];[ebp+eax-0E8h]=temp_D
0043801A |. 8B8D 3CFFFFFF |mov ecx,dword ptr ss:[ebp-C4]
00438020 |. 0FBE840D D0FEFFFF |movsx eax,byte ptr ss:[ebp+ecx-130];[ebp+ecx-130]=註冊碼
00438028 |. 83C0 EC |add eax,-14
0043802B |. 3BD0 |cmp edx,eax
0043802D |. 75 5D |jnz short 屏錄專家.0043808C
| |
0043802F |. 83BD 3CFFFFFF 03 |cmp dword ptr ss:[ebp-C4],3;是不是第5位
00438036 |. 75 45 |jnz short 屏錄專家.0043807D;不是第5位
| |
00438038 |. 8B95 40FFFFFF |mov edx,dword ptr ss:[ebp-C0];[ebp-C0]=temp_H
0043803E |. 81C2 444D0000 |add edx,4D44
00438044 |. 8995 CCFEFFFF |mov dword ptr ss:[ebp-134],edx
0043804A |. DB85 CCFEFFFF |fild dword ptr ss:[ebp-134]
00438050 |. DC0D A4894300 |fmul qword ptr ds:[4389A4] ;3.14
00438056 |. DB2D AC894300 |fld tbyte ptr ds:[4389AC] ;1.59489633173843711e-1
0043805C |. DEC9 |fmulp st(1),st
0043805E |. E8 25830A00 |call <屏錄專家.@_ftol$qv> ;eax=st
00438063 |. 8985 40FFFFFF |mov dword ptr ss:[ebp-C0],eax
00438069 |. 8B85 40FFFFFF |mov eax,dword ptr ss:[ebp-C0]
0043806F |. B9 A0860100 |mov ecx,186A0
00438074 |. 99 |cdq
00438075 |. F7F9 |idiv ecx
00438077 |. 8995 40FFFFFF |mov dword ptr ss:[ebp-C0],edx ;edx:餘數
| |
0043807D |> FF85 3CFFFFFF |inc dword ptr ss:[ebp-C4]
00438083 |. 83BD 3CFFFFFF 05 |cmp dword ptr ss:[ebp-C4],5 ;loop 5 次
0043808A |.^ 7C 80 \jl short 屏錄專家.0043800C
0043808C |> 83BD 3CFFFFFF 05 cmp dword ptr ss:[ebp-C4],5 ;是不是第5位
00438093 |. 0F8C AD080000 jl 屏錄專家.00438946 ;小於5失敗
以下檢查第5位:
00438099 |. 8B85 40FFFFFF mov eax,dword ptr ss:[ebp-C0]
0043809F |. B9 0A000000 mov ecx,0A
004380A4 |. 99 cdq
004380A5 |. F7F9 idiv ecx
004380A7 |. 8B85 3CFFFFFF mov eax,dword ptr ss:[ebp-C4]
004380AD |. 0FBE8C05 D0FEFFFF movsx ecx,byte ptr ss:[ebp+eax-130];[ebp+eax-130]=第5位註冊碼
004380B5 |. 83C1 BF add ecx,-41
004380B8 |. 2BCA sub ecx,edx ;edx通過對temp_H計算得到
004380BA |. 898D 38FFFFFF mov dword ptr ss:[ebp-C8],ecx
004380C0 |. 83BD 38FFFFFF 00 cmp dword ptr ss:[ebp-C8],0
004380C7 |. 74 0D je short 屏錄專家.004380D6 ;成功
004380C9 |. 83BD 38FFFFFF 05 cmp dword ptr ss:[ebp-C8],5
004380D0 |. 0F85 25080000 jnz 屏錄專家.004388FB ;失敗
static char s[14]="xxxxxx"//註冊碼
int count
int buffer
for count=0 to 5 do
{ cmp temp_D[count],(s[count]-14)
jnz fail
if count=3 do {
buffer=mod(((temp_H+4d44h)*3.14*1.59489633173843711e-1)/186a0h)
}
}
buffer=s[count]-41-mod(buffer/0ah)
if buffer=0 or buffer=5 jmp succeed
fail:
succeed:
;************************************************************************************************************
成功:
004380D6 |> 66:C785 5CFFFFFF 4400 mov word ptr ss:[ebp-A4],44
004380DF |. BA 5AB85000 mov edx,屏錄專家.0050B85A
004380E4 |. 8D45 E4 lea eax,dword ptr ss:[ebp-1C]
004380E7 |. E8 ACF10A00 call <屏錄專家.sub_4E7298>
004380EC |. FF85 68FFFFFF inc dword ptr ss:[ebp-98]
004380F2 |. 8B00 mov eax,dword ptr ds:[eax]
004380F4 |. E8 472E0500 call <屏錄專家.@Dialogs@ShowMessage$qqrx17System@AnsiString>
004380F9 |. FF8D 68FFFFFF dec dword ptr ss:[ebp-98]
004380FF |. 8D45 E4 lea eax,dword ptr ss:[ebp-1C]
00438102 |. BA 02000000 mov edx,2
【破解總結】
不能爆破,因為通過註冊後他會把註冊明肯註冊碼儲存在pmlxzj.dll檔案裡,再次起動時會再檢查,
我的機器碼為"92388863",輸入註冊名為“ABABABAB"
下斷點在:
0043800C |> 8B85 3CFFFFFF /mov eax,dword ptr ss:[ebp-C4]
00438012 |. 0FBE9405 18FFFFFF |movsx edx,byte ptr ss:[ebp+eax-E8];[ebp+eax-0E8h]=temp_D
可見[ebp+eax-E8]指向"31 35 36 35 30 00"
可得:
31h+14h=45h->"E"
35h+14h=49h->"I"
36h+14h=4Ah->"J"
35h+14h=49h->"I"
30h+14h=44h->"D"
"EIJID"為前5位註冊碼
再下斷點在:
004380AD |. 0FBE8C05 D0FEFFFF movsx ecx,byte ptr ss:[ebp+eax-130];[ebp+eax-130]=第5位註冊碼
004380B5 |. 83C1 BF add ecx,-41
004380B8 |. 2BCA sub ecx,edx
可得到edx=3
所以第5位註冊碼為:3+41h=44h->"D" 或3+41h+5=49h->"I" 我的註冊碼為"EIJIDD"或"EIJIDI"
通過上面輸入註冊名與註冊碼後將通過註冊,所有限制都取消,生成*.avi已沒有未註冊字樣,
但生成*.exe時還是有未註冊字樣,通過重新跟蹤發現程式重新執行時又讀取註冊名與註冊碼,進行了新的計算,
沒能跟出來,但我用了另外一種方法來解決這個問題,就是把"play.dat"裡未註冊字樣改為空格,
這樣使用起來還沒有發現有什麼問題。
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