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Why do APT attackers often use custom malware and zero-day exploits instead of publicly known tools?

hard🧠 Conceptual Q10 of 15
Cybersecurity - Advanced Threat Protection
Why do APT attackers often use custom malware and zero-day exploits instead of publicly known tools?
ATo cause immediate damage and disrupt services quickly
BTo avoid detection by standard security defenses and maintain stealth
CBecause custom malware is easier to develop than using public tools
DBecause zero-day exploits are publicly available and widely used
Step-by-Step Solution
Solution:
  1. Step 1: Understand attacker goals in APT

    APTs aim for stealth and long-term access, so they avoid known tools that security systems detect easily.
  2. Step 2: Analyze reasons for custom tools and zero-days

    Custom malware and zero-days help bypass defenses and remain hidden, unlike public tools.
  3. Final Answer:

    To avoid detection by standard security defenses and maintain stealth -> Option B
  4. Quick Check:

    Custom tools = Stealth and evasion [OK]
Quick Trick: Custom malware hides better than public tools [OK]
Common Mistakes:
MISTAKES
  • Thinking custom malware is easier to make
  • Assuming zero-days are public
  • Believing APTs want quick damage

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