Which technique overlays the legitimate page and uses a higher z-index, often loading it in an invisible iframe?

Which technique overlays the legitimate page and uses a higher z-index, often loading it in an invisible iframe?

• A. Cropping
• B. DNS Interrogation
• C. Load Balancer
• D. Complete Transparent Overlay

Answer: (D)

This question tests the concept of clickjacking, where an attacker places a transparent or visually deceptive layer over a legitimate page and uses a higher z-index to sit on top. By loading the actual content in an invisible or nearly invisible iframe, the attacker can trap or redirect the user’s actions while they think they’re interacting with the real page. A complete transparent overlay describes exactly this setup: a full-page layer that is see-through and overlays the true interface, often implemented with an iframe or similar mechanism to render the underlying content without the user noticing. The other options don’t describe this technique. Cropping is about cutting parts of an image, DNS Interrogation involves querying DNS records, and a Load Balancer handles distributing network traffic. None of these involve overlaying a page or using a higher z-index to intercept user input.

This question tests the concept of clickjacking, where an attacker places a transparent or visually deceptive layer over a legitimate page and uses a higher z-index to sit on top. By loading the actual content in an invisible or nearly invisible iframe, the attacker can trap or redirect the user’s actions while they think they’re interacting with the real page. A complete transparent overlay describes exactly this setup: a full-page layer that is see-through and overlays the true interface, often implemented with an iframe or similar mechanism to render the underlying content without the user noticing.

The other options don’t describe this technique. Cropping is about cutting parts of an image, DNS Interrogation involves querying DNS records, and a Load Balancer handles distributing network traffic. None of these involve overlaying a page or using a higher z-index to intercept user input.