Virus Classifications and Concealment Strategies

What is the primary function of a worm?

To delete files on a system
To encrypt files on a system
To create backdoors on a system
To actively seek out more machines to infect (correct)

How do email worms typically spread?

Through script code included in email attachments (correct)
Through network vulnerabilities
Through infected media such as USB drives
Through instant messaging services

What is a common way for worms to replicate themselves?

By exploiting software vulnerabilities
By executing a copy of themselves on another system
By creating a copy of themselves on removable media (correct)
By modifying system files

What is a characteristic of a metamorphic virus?

It mutates and rewrites itself completely at each iteration (A) Signup and view all the answers

What is the purpose of a payload in a worm?

To carry out malicious activities (D) Signup and view all the answers

How do worms often target systems for infection?

Through software exploits (C) Signup and view all the answers

What is a common way for worms to spread through networks?

Through network connections from system to system (A) Signup and view all the answers

What is the first known implementation of a worm?

In the early 1980s at Xerox Palo Alto Labs (B) Signup and view all the answers

What is a key characteristic that distinguishes a bot from a worm?

Remote control facility (A) Signup and view all the answers

What is a common protocol used for covert communication channels in recent botnets?

HTTP (D) Signup and view all the answers

What is the primary function of a keylogger?

To capture keystrokes (D) Signup and view all the answers

What is the goal of a phishing attack?

To leverage user trust (A) Signup and view all the answers

What is a characteristic of spear-phishing attacks?

Recipients are carefully researched (B) Signup and view all the answers

What is a common way that malware is spread through email?

Through phishing attacks (B) Signup and view all the answers

What is a common task performed by spyware?

Redirecting web page requests (C) Signup and view all the answers

What is a primary difference between bots and worms in terms of propagation?

Worms are self-replicating, while bots are not (D) Signup and view all the answers

How does the CommWarrior worm replicate to other phones?

By sending itself as an MMS file to contacts and as an auto reply to incoming text messages (D) Signup and view all the answers

What is the primary target of mobile phone worms?

The smartphone's operating system (B) Signup and view all the answers

How do drive-by-downloads deliver their payload?

By exploiting browser and plugin vulnerabilities (A) Signup and view all the answers

What is the primary method of remote execution used by drive-by-downloads?

By exploiting vulnerabilities in the browser (B) Signup and view all the answers

How do watering-hole attacks differ from drive-by-downloads?

They are more targeted and focused on specific organizations (C) Signup and view all the answers

How do mobile phone worms spread through email?

They do not spread through email (A) Signup and view all the answers

What is the primary goal of a watering-hole attack?

To target a specific organization or individual (C) Signup and view all the answers

What is the primary difference between a drive-by-download and a watering-hole attack?

The target of the attack (C) Signup and view all the answers