Question

A program that neither replicates or copies itself, but does damage or compromises the security of the computer. Which 'Computer Virus' is it ?

• A. Joke Program
• B. Worm
• C. Trojan
• D. Hoax

Hint:

- Virus: Replicates by attaching itself to a host file.
- Worm: Replicates independently across networks without host files.
- Trojan: Does not replicate; disguised as legitimate software.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Malicious software (malware) includes various programs designed to damage, disrupt, or gain unauthorized access to computer systems.
Different types of malware are classified based on their execution methods and replication mechanisms.

Step 2: Detailed Explanation:
Let us evaluate each type of program to identify its replication and threat characteristics:
- Trojan (Trojan Horse):
A Trojan is a malicious program that misleads users of its true intent by appearing as a legitimate, useful software or utility (e.g., a free game or system optimizer).
Once executed, it performs harmful actions, such as stealing data, deleting files, or creating backdoors for attackers.
Crucially, Trojans do not replicate or copy themselves to other files or systems automatically, unlike traditional viruses and worms.
They rely on social engineering and user execution to spread.
- Worm:
A worm is a standalone malware program that replicates itself automatically over computer networks to spread to other computers, without needing any human intervention or a host file.
- Joke Program:
These are harmless programs designed to scare or annoy users (such as moving the mouse cursor or shaking the screen) but do not cause actual damage or compromise system security.
- Hoax (Virus Hoax):
An email or message warning recipients of a non-existent computer virus, often advising them to delete essential system files under the guise of security.

Step 3: Final Answer:
The program described is a Trojan.