Signature code is a code segment killed by antivirus software. By changing the signature code, anti-virus software will not kill if it is not recognized as a virus. As for 360, it can be killed without signature code. Modify Trojan resources, change entry points, encrypt segments, add digital signatures, and then strengthen the shell to kill 360. If you are killed, you will not succeed if you watch more, practice more and operate more, and have your own idea of not killing.