A backdoor is a hidden way into a system that skips normal authentication. An attacker can leave one behind after an intrusion, or it can come hidden inside legitimate software, and it's used to get back into the system at will.
How TecnetOne handles it: Penetration Testing
back door, hidden access, backdoor malware
Related terms
Trojan
A trojan is a malicious program that poses as something useful or harmless, such as an installer, an invoice or an update, so the user runs it. Once inside, it opens the way for other malware or for remote control of the computer.
Rootkit
A rootkit is a set of tools that hides in the deepest layers of the operating system to conceal other malware and keep the attacker's access. It's hard to detect with conventional antivirus.
RAT (remote access trojan)
A RAT (remote access trojan) is a trojan that gives the attacker full remote control of the infected computer, from the screen and camera to files and programs. It usually arrives disguised as a legitimate document or installer.
Adware
Adware is a program that shows unwanted ads on a computer or in the browser, often installed alongside free software. Beyond the annoyance, many variants track the user's browsing habits and open the door to other malicious programs.
Computer worm
A worm is a malicious program that copies itself and spreads from one computer to another across the network without anyone opening a file. Unlike a virus, it doesn't need a host program, and it can saturate entire networks within hours.
Logic bomb
A logic bomb is a piece of malicious code that stays dormant until a condition is met, such as a date, a deleted user account or a number of runs. When it triggers, it deletes, encrypts or alters data on the system.
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