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Certified Ethical Hacker (CEH) Practice Question

During a penetration test you have copied the /etc/shadow file from a Linux server. Based on user behavior, you believe their passwords are common English words with simple modifications such as capitalizing the first letter or appending a two-digit number. What John the Ripper option will test this pattern most efficiently before you attempt a full brute-force attack?

  • Launch an incremental brute-force attack: john --incremental=All shadow.txt

  • Use single-crack mode: john --single shadow.txt

  • Run john with a wordlist and built-in rules: john --wordlist=rockyou.txt --rules shadow.txt

  • Invoke an external filter: john --external=Bypass shadow.txt

Certified Ethical Hacker (CEH)
System Hacking Phases and Attack Techniques
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