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by 来自轻院的狼[Immlep]
这个不是什么新鲜的东西，不过我还没有见过有人在壳中使用的，用这个来做anti，它比FindWindow强很多了，不过这些东西说出来后，以后就没什么，可能以后你一看到类似的anti你就会很清楚了，另外这个anti调用的函数过多，代码长，挺不好的，本文中的例子（InString ）是我引用现成的代码的，只不过做了一下简单的修改。思路是使用GetWindow循环获取系统的窗口的标题，查看标题中是否包含了要查找的关键字，如果发现，就做坏事，这个来检测Ollydbg也挺好的，可以检测"- [CPU - ",这样的字样，另外因为Ollydbg调试的时候会把被调试程序的名称显示在Ollydbg的窗口中，所以我们也可以检测“－debugme.exe-[”这样的字符（debugme.exe为被调试程序的名称，你可以用GetFullFilename等函数来获取被加壳后程序的名称），当然最好先给这些字符加密一下了。。
还有你可以用InString来做不anti的其它事情，这样可以防止调试者在InString做手脚，另外这个anti调用的函数，你最好也让它干一些有用的东西，不要只拿来做anti,很容易被hook的:)
我测试了一下，anti效果还是良好的，什么修改版的Od都被干掉了（当然不保证以后），SoftICE的loader也不例外:)
[code]
searchtext PROC
；；；；；；获取系统中所有窗口的标题
invoke GetDesktopWindow
invoke GetWindow,eax,GW_CHILD
@1:
mov hwindow,eax
invoke GetWindowText,hwindow,ADDR buff,200
cmp eax,0
jz skip1
;lea edi,offset buff
push offset buff2 ；我们要查找的窗口标题中包含的关键字，如"- [CPU - "
push offset buff ；；找到的窗口的中标题
push 1 ；从第一个字符找
call _InString
add esp,0ch
;invoke InString,1,addr buff,addr buff2
cmp eax,0
jz @F
invoke PostMessage,hwindow,WM_QUIT,0,0 ;在壳中做坏事不要这样做，很容易被跟踪出来的，自己想点新鲜的。
;invoke MessageBox,NULL,addr szdbtext1,addr szdbtext1,MB_OK
skip1:
@@:
invoke GetWindow,hwindow,GW_HWNDNEXT
cmp eax,NULL
jne @1
jmp loc111
；；；；；；获取系统中所有窗口的标题
;;;;InString我处理了重定位问题，，可以在壳中使用！！！代码好长！！汗个！！！！
_InString:
jmp @F
StartPos dd 0
lpszString dd 0
lpszSubStr dd 0
lnStrng dd 0
lnSubSt dd 0
reg1 dd 0
reg2 dd 0
Byte1 byte 0
@@:
push eax
mov eax,DWORD PTR [ESP+8]
mov [EBP+OFFSET StartPos],eax
pop eax
push eax
mov eax,DWORD PTR [ESP+0ch]
mov [EBP+OFFSET lpszString],eax
pop eax
push eax
mov eax,DWORD PTR [ESP+10h]
mov [EBP+OFFSET lpszSubStr],eax
pop eax
push esi
push edi
push ebx
.if [EBP+OFFSET StartPos] < 1
mov eax, -2 ; set eax -2
jmp @@Get_Outa_Here ; exit if less than 1
.endif
dec [EBP+OFFSET StartPos] ; correct to 0 based index
mov eax,[EBP+OFFSET lpszString]
call _lstrlen ；；；；；把原来的lstrlen函数也干掉！！！
mov [EBP+OFFSET lnStrng], eax
push eax
mov eax,[EBP+OFFSET lpszSubStr]
call _lstrlen
mov [EBP+OFFSET lnSubSt], eax
pop eax
sub eax, [EBP+OFFSET lnSubSt] ; subtract substr len from main string
; The following order is important.
.if eax >= [EBP+OFFSET lnStrng] ; the substring is greater than the main string
mov eax,0
jmp @@Get_Outa_Here
.elseif [EBP+OFFSET StartPos] == eax ; startpos at the last position accepted
jmp Same_Size
.elseif [EBP+OFFSET StartPos] > eax ; startpos greater than the last position accepted
mov eax, 0
jmp @@Get_Outa_Here
.elseif eax == 0 ; the two strings have the same size
jmp Same_Size
.endif
mov esi, [EBP+OFFSET lpszSubStr] ; get 1st byte in substring
mov bl, [esi]
; -------------------------------------------------------
; set maximum count as main string length minus substring
; -------------------------------------------------------
mov ecx, [EBP+OFFSET lpszString]
add ecx, [EBP+OFFSET lnStrng]
sub ecx, [EBP+OFFSET lnSubSt]
inc ecx
mov esi, [EBP+OFFSET lpszString] ; main string address
add esi, [EBP+OFFSET StartPos] ; add starting position to esi
cld ; read forward
@@L1s: ; 8 cycles on no 1st char match
mov al, [esi] ; 1
inc esi ; 1
cmp al, bl ; 1 find 1st substring byte
je @F ; 1 - 3 compare subsequent bytes to
@@L1r:
cmp esi, ecx ; 1
jne @@L1s ; 3 - 1
mov eax, 0 ; return zero and exit if
jmp @@Get_Outa_Here ; match not found in string
; ------------------------------------------------
; do the comparison, main string is already in esi
; ------------------------------------------------
@@:
mov [EBP+OFFSET reg1], ecx ; 1
mov [EBP+OFFSET reg2], esi ; 1
mov byte ptr[EBP+OFFSET Byte1], bl ; 1
mov ecx, [EBP+OFFSET lnSubSt ] ; sub string length
.if ecx == 1
inc esi
jmp @@GetRetVal
.endif
inc ecx ; compare correct number of bytes
dec esi ; back one to compare correct bytes
mov edi, [EBP+OFFSET lpszSubStr]
repe cmpsb ; 9 if strings match, ecx will be 0
cmp ecx, 0 ; did the two strings match ??
jne @F
; jnz @F
@@GetRetVal:
mov eax, [EBP+OFFSET lpszString]
sub esi, eax ; subtract it from esi current value
sub esi, [EBP+OFFSET lnSubSt] ; subtract the search string length
mov eax, esi ; put count in eax
add eax, [EBP+OFFSET StartPos] ; add starting pos to get correct count
jmp @@Get_Outa_Here
@@:
mov ecx, [EBP+OFFSET reg1] ; 1
mov esi, [EBP+OFFSET reg2] ; 1
mov bl,byte ptr[EBP+OFFSET Byte1] ; 1
jmp @@L1r ; try again for match
Same_Size:
mov esi, [EBP+OFFSET lpszString ] ; main string address
add esi, [EBP+OFFSET StartPos ] ; add starting position to esi
mov edi, [EBP+OFFSET lpszSubStr] ; sub string address
mov ecx, [EBP+OFFSET lnSubSt ] ; sub string length
cld
repe cmpsb
.if ZERO? ; the two strings match
mov eax, [EBP+OFFSET StartPos ] ; get the return value
inc eax
.else
mov eax, 0
.endif
jmp @@Get_Outa_Here
_lstrlen:
pushfd
push ecx
push ebx
;mov eax,lpStr
lea ecx,[eax-1]
l1: inc ecx
test ecx,3
jz l2
cmp byte ptr[ecx],0
jne l1
jmp l6
l2: mov ebx,[ecx] ; U
add ecx,4 ; V
test bl,bl ; U
jz l5 ; V
test bh,bh ; U
jz l4 ; V
test ebx,0ff0000h ; U
jz l3 ; V
test ebx,0ff000000h ; U
jnz l2 ; V +1brt
inc ecx
l3: inc ecx
l4: inc ecx
l5: sub ecx,4
l6: sub ecx,eax
mov eax,ecx
pop ebx
pop ecx
popfd
db 0C3h
@@Get_Outa_Here:
pop ebx
pop edi
pop esi
ret
searchtext endp
[/code]
