Countermeasures for server intrusion-Trojan and backdoor detection and removal in the corner

Author: In today's era when wtf is so crazy about script intrusion, the so-called "0-day" of the script system is flying over the sky, and the WebShell is accidentally put on the server. How do I kill webshells that already exist on the server? It is estimated that many of my friends may feel a slight chill when they see this problem, because the current WebShell is too BT, so it seems like the neighborhood! Take Windows Server 2003 + ASP + SQL Server + IIS as an example. This article lists three common methods to clear webshells and Trojan shells. If you have