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CAS-005 · Question #509

CAS-005 Question #509: Real Exam Question with Answer & Explanation

The correct answer is C: EDR evasion. The attacker used EDR evasion by tunneling command-and-control traffic over HTTPS to a non- malicious IP. This hides the beaconing within legitimate encrypted traffic, bypassing detection even with deep packet inspection in place.

Submitted by andres_qro· Mar 6, 2026Security Operations

Question

A security engineer is reviewing logs and summarizes the following: - The target host communicates to an external IP address over HTTPS. - The external IP address was not categorized as malicious. - The company has a deep packet inspection system that supports HTTPS traffic. - The attack uses a known command-and-control tool to beacon from an affected host. Which of the following techniques did the attacker most likely use?

Options

  • ARedirection
  • BCustom BOF
  • CEDR evasion
  • DSteganography

Explanation

The attacker used EDR evasion by tunneling command-and-control traffic over HTTPS to a non- malicious IP. This hides the beaconing within legitimate encrypted traffic, bypassing detection even with deep packet inspection in place.

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