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How does a 'Trojan Horse' typically affect a computer system?
By replicating itself like a worm
By disguising itself as legitimate software to gain unauthorized access
By encrypting all files and demanding a ransom
By deleting the operating system kernel
By disguising itself as legitimate software to gain unauthorized access
A Trojan Horse is a type of malware that disguises itself as legitimate or desirable software to trick users into executing it. Once activated, it grants unauthorized access or performs malicious activities on the host system without the user's explicit consent.
ISO/IEC 27001 (Information Security Management Systems)
A Trojan Horse is a type of malware that disguises itself as legitimate or desirable software to trick users into executing it. Once activated, it grants unauthorized access or performs malicious activities on the host system without the user's explicit consent.
The principle relies on social engineering. A user is enticed to run a file, often embedded in attachments, cracked software, or freeware. Upon execution, the malware payload is deployed, which may include establishing a backdoor, installing keyloggers, or exfiltrating data while maintaining a legitimate process appearance to evade detection by basic security measures.
Trojan horses do not self-replicate, distinguishing them from viruses and worms.
The primary vector for Trojan deployment is user interaction through social engineering.
Trojan behavior is often classified by its payload, such as Backdoor, Rootkit, or Downloader.
Detection often requires behavioral analysis rather than just signature matching.
Compromise of system confidentiality, integrity, and availability.
Difficult to detect once the Trojan establishes persistence.
Option A describes a Worm, which actively spreads across networks without human action.
Option C describes Ransomware, a specific category of malware that encrypts data for extortion.
Option D is generally associated with destructive Wipers or rootkits rather than the classical definition of a Trojan.
The term is derived from the Greek myth of the Trojan Horse used to infiltrate Troy.
B is correct тАФ A Trojan Horse disguises itself as legitimate software to gain unauthorized access to the system.
In exams, remember the mnemonic: Worms replicate automatically; Trojans require a 'door-opener' (user action); Viruses require a host file to attach to.