What term describes software or code that provides an attacker with ongoing, covert access to a system?

What term describes software or code that provides an attacker with ongoing, covert access to a system?

• A. Backdoors
• B. Rootkits
• C. Trojans
• D. Keyloggers

Answer: (A)

Backdoors are covert entry points that give an attacker ongoing access to a system, bypassing normal authentication and control mechanisms. They enable persistence—once installed, they stay in place and can be used to reconnect even after the original vulnerability is closed. These mechanisms can be hidden or disguised to avoid detection, letting the attacker maintain control over the compromised host for extended periods. In contrast, rootkits focus on hiding the presence of malicious software, trojans rely on deceiving users to install themselves, and keyloggers simply record keystrokes. While a backdoor can be part of other malware, its defining trait is the ability to keep access open for the attacker.

Backdoors are covert entry points that give an attacker ongoing access to a system, bypassing normal authentication and control mechanisms. They enable persistence—once installed, they stay in place and can be used to reconnect even after the original vulnerability is closed. These mechanisms can be hidden or disguised to avoid detection, letting the attacker maintain control over the compromised host for extended periods. In contrast, rootkits focus on hiding the presence of malicious software, trojans rely on deceiving users to install themselves, and keyloggers simply record keystrokes. While a backdoor can be part of other malware, its defining trait is the ability to keep access open for the attacker.