Full Analysis of MSSQL Stored Procedure decryption process

Because I got a Q & A program of my own in the past two days, I found that the developer encrypted my stored procedure, depressed, and found a solution. now share: Open the query analyzer, go to your database and run the following SQL statement: CREATEPROCEDUREsp_decrypt (@ objectNamevarchar (50) ASbeginbegintra

Because I got a Q & A program of my own in the past two days, I found that the developer encrypted my stored procedure, depressed, and found a solution. now share: Open the query analyzer, go to your database and run the following SQL statement: CREATEPROCEDURE sp_decrypt (@ objectName varchar (50) AS begin tra

Because I got a Q & A program of my own in the past two days, I found that the developer encrypted my stored procedure, depressed, and found a solution. Now I share it with you:

Open the query analyzer, locate your database, and execute the following SQL statement:

Create procedure sp_decrypt (@ objectName varchar (50 ))
AS
Begin
Begin transaction
Declare @ objectname1 varchar (100)
Declare @ sql1 nvarchar (4000), @ sql2 nvarchar (4000), @ sql3 nvarchar (4000), @ sql4 nvarchar (4000), @ sql5 nvarchar (4000 ), @ sql6 nvarchar (4000), @ sql7 nvarchar (4000), @ sql8 nvarchar (4000), @ sql9 nvarchar (4000), @ sql10 nvarchar (4000)
DECLARE @ OrigSpText1 nvarchar (4000), @ OrigSpText2 nvarchar (4000), @ OrigSpText3 nvarchar (4000), @ resulnvtsp archar (4000)
Declare @ I int, @ t bigint
Declare @ m int, @ n int, @ q int
Set @ m = (SELECT max (colid) FROM syscomments WHERE id = object_id (@ objectName ))
Set @ n = 1
-- Get encrypted data
Create table # temp (colid int, ctext varbinary (8000 ))
Insert # temp SELECT colid, ctext FROM syscomments WHERE id = object_id (@ objectName)
Set @ sql1 = 'alter PROCEDURE '+ @ objectName +' with encryption'
-- Set @ sql1 = 'alter PROCEDURE '+ @ objectName +' with encryption'
Set @ q = len (@ sql1)
Set @ sql1 = @ sql1 + REPLICATE ('-', 4000-@ q)
Select @ sql2 = REPLICATE ('-', 4000), @ sql3 = REPLICATE ('-', 4000), @ sql4 = REPLICATE ('-', 4000 ), @ sql5 = REPLICATE ('-', 4000), @ sql6 = REPLICATE ('-', 4000), @ sql7 = REPLICATE ('-', 4000 ), @ sql8 = REPLICATE ('-', 4000), @ sql9 = REPLICATE ('-', 4000), @ sql10 = REPLICATE ('-', 4000)
Exec (@ sql1 + @ sql2 + @ sql3 + @ sql4 + @ sql5 + @ sql6 + @ sql7 + @ sql8 + @ sql9 + @ sql10)
While @ n <= @ m
Begin
SET @ OrigSpText1 = (SELECT ctext FROM # temp WHERE colid = @ n)
Set @ objectname1 = @ objectname + '_ t'
SET @ OrigSpText3 = (SELECT ctext FROM syscomments WHERE id = object_id (@ objectName) and colid = @ n)
If @ n = 1
Begin
SET @ OrigSpText2 = 'create PROCEDURE '+ @ objectName +' with encryption '--
Set @ q = 4000-len (@ OrigSpText2)
Set @ OrigSpText2 = @ OrigSpText2 + REPLICATE ('-', @ q)
End
Else
Begin
SET @ OrigSpText2 = REPLICATE ('-', 4000)
End
-- Start counter
SET @ I = 1
-- Fill temporary variable
SET @ resultsp = replicate (N 'A', (datalength (@ OrigSpText1)/2 ))

-- Loop
WHILE @ I <= datalength (@ OrigSpText1)/2
BEGIN
-- Reverse encryption (XOR original + bogus encrypted)
SET @ resultsp = stuff (@ resultsp, @ I, 1, NCHAR (UNICODE (substring (@ OrigSpText1, @ I, 1) ^
(UNICODE (substring (@ OrigSpText2, @ I, 1) ^
UNICODE (substring (@ OrigSpText3, @ I, 1 )))))
SET @ I = @ I + 1
END
-- Drop original SP
-- EXECUTE ('drop processure '+ @ objectName)
-- Remove encryption
-- Preserve case
SET @ resultsp = REPLACE (@ resultsp), 'with encryption ','')
SET @ resultsp = REPLACE (@ resultsp), 'With Encryption ','')
SET @ resultsp = REPLACE (@ resultsp), 'with encryption ','')
If charindex ('with encryption', UPPER (@ resultsp)> 0
SET @ resultsp = REPLACE (UPPER (@ resultsp), 'WITH encryption ','')
-- Replace Stored procedure without enryption
Print @ resultsp
-- Execute (@ resultsp)
Set @ n = @ n + 1
End
Drop table # temp
Rollback transaction
End
GO

Note: replace @ objectName with the name of the stored procedure you want to crack (for example, replace it with @ ***. com ).

In this way, you create a stored procedure called sp_decrypt in your database,

Call sp_decrypt in the query analyzer to decrypt the stored procedure to be cracked. The statement is as follows:

Exec sp_decrypt 'stored procedure name'

Here is an example of a specific statement: exec sp_decrypt '***. com' (note that the name is "single quotation marks ").

After the decryption is completed, copy the SQL script to your server and restore it.