A backdoor is also known as a trapdoor or manhole and is known to be a secret means of bypassing security in order to gain access to a system or a restricted part of a system. Some virus contains payload that installs a backdoor component in a system. This backdoor, thus grants the attacker special privilege access to the system at anytime.
Cyber attackers are individuals with networking and hacking skills needed to exploit vulnerabilities in networks to retrieve and steal information for mischievous reasons.
Malicious softwares or malwares are program softwares developed and planted to infiltrate system and network security. Examples of malwares are virus, worm, rootkit, Trojan horse, keylogger etc. They infect systems and networks to creat a back or trap door or loophole for attackers to access networks.
