Copy Code code as follows:
Dxy
How are you doing!
I've been learning vbs for a short time, and recently I've seen a book about the encryption of the VBS script, I tried, but there is a problem, low-level grammatical errors I have fixed, but the script does not work after running. So I'd like to ask you a question. The principle of scripting is this: it converts code into 16, Then write a decryption code, through this decryption to execute the encrypted code, the string into 16 code as follows:
Function Str2hex (Byval strhex)
For I=1 to Len (Strhex)
ShEx = ShEx & Hex (ASC (strhex,i,1))
Next
Str2hex = ShEx
End Function
The decrypted code is as follows:
Function hextostr (data)
Hextostr = "Execute" "" "" "" ""
C= "&CHR" (&h)
N= ")"
Do while Len (data) >1
If IsNumeric (left (data,1)) Then
Hextostr=hextostr&c&left (data,2) &n
Data=mid (data,3)
Else
Hextostr=hextostr&c&left (data,4) &n
Data=mid (data,5)
End If
Loop
End Function
The decryption code seems to have a problem, please correct me, I can't find
The entire finished product is:
On Error Resume Next
Set arg=wscript.arguement ' Declare external parameters
If arg.count=0 Then wscript.quit ' exit script if no parameters
Set Fso=creatobject ("Scripting.filesystem Object") ' Declares the FSO component
When Fso.opentextfile (ARG (0), 1,flase)
data = Readall:.close ' reads text content
If err.number<>0 then Wscript.Quit ' If an error occurs, exit
With Fso.opentextfile (ARG (0) & "*.vbs", 2,true) ' writes the converted well into a new VBS
If err.number<>0 then Wscript.Quit ' If an error occurs, exit
. WriteLine "Execute (Hextostr (" "&str2hex (data) &" "))" ' Perform decryption and execute decrypted code
. WriteLine "Function hextostr (data)"
. WriteLine "hextostr=" "" "" "" "" "" "" "" "" "" "
. WriteLine "c=" "&CHR" (&h "" "
. WriteLine "n="
. WriteLine "Do While Len (data) >1"
. WriteLine "If IsNumeric (left (data,1)) then"
. WriteLine "Hextostr=hextostr&c&left (data,2) &n"
. WriteLine "data = (data,3)"
. WriteLine "Else"
. WriteLine "Hextostr=hex to Str&c&left (data,4) &n"
. WriteLine "Data=mid (data,5)"
. WriteLine "End If"
. WriteLine "Loop"
. WriteLine "End Function"
' Write the decryption function in
. Close ' Closes the text
Set fso=nothing ' Logoff FSO component
End With
MsgBox "OK"
' The following is the cryptographic function
Function Str2hex (Byval strhex)
For I=1 to Len (Strhex)
ShEx = ShEx & Hex (ASC (strhex,i,1))
Next
Str2hex = ShEx
End Function
' All the code is here, so long ~
The book said, to the encryption of the VBS script dragged to the script on the line, but I did not succeed, do not know there are problems, please help me, thank you ~
The code above takes note of several situations:
1, set arg=wscript.arguements
There's an s in the back door.
2, set Fso=creatobject ("Scripting.filesystem Object") ' Declares the FSO component
It should be filesystemboject.
3. WriteLine "n="
The way to "n=" with VBS (double quotes) is to use the two ""
. WriteLine "n=" "" "" "
4. WriteLine "data = (data,3)" Here is less mid
That's basically it.
Do.vbs Save As Do.vbs, will be encrypted JS file dragged to this file can be
Copy Code code as follows:
' On Error Resume Next
Set arg=wscript.arguments ' Declare external parameters
If arg.count=0 Then wscript.quit ' exit script if no parameters
Set Fso=createobject ("Scripting.FileSystemObject") ' Declares the FSO component
Filename=wscript.arguments (0)
Set Readline=fso.opentextfile (filename,1,flase)
Data=readline.readall:
Readline.close ' Read text content
If err.number<>0 then Wscript.Quit ' If an error occurs, exit
With Fso.opentextfile (filename& "_out.vbs", 2,true) ' writes the converted good into a new VBS
If err.number<>0 then Wscript.Quit ' If an error occurs, exit
. WriteLine "Execute (Hextostr (" "&str2hex (data) &" "))" ' Perform decryption and execute decrypted code
. WriteLine "Function hextostr (data)"
. WriteLine "hextostr=" "" "" "" "" "" "" "" "" "" "
. WriteLine "c=" "&CHR" (&h "" "
. WriteLine "n=" "" "" "
. WriteLine "Do While Len (data) >1"
. WriteLine "If IsNumeric (left (data,1)) then"
. WriteLine "Hextostr=hextostr&c&left (data,2) &n"
. WriteLine "Data = Mid (data,3)"
. WriteLine "Else"
. WriteLine "Hextostr=hextostr&c&left (data,4) &n"
. WriteLine "Data=mid (data,5)"
. WriteLine "End If"
. WriteLine "Loop"
. WriteLine "End Function"
' Write the decryption function in
. Close ' Closes the text
End With
Set fso=nothing ' Logoff FSO component
MsgBox "OK"
' The following is the cryptographic function
Function Str2hex (Byval strhex)
For I=1 to Len (Strhex)
ShEx = ShEx & Hex (ASC (strhex,i,1))
Next
Str2hex = ShEx
End Function
