A penetration tester is trying to crack passwords from a captured hash list. An initial dictionary attack was unsuccessful. The tester believes the users likely modified common dictionary words by capitalizing the first letter and appending a number, a common pattern to meet complexity requirements. Which John the Ripper feature should the tester use to efficiently test for these specific variations?
John the Ripper's rule-based attack mode allows for the efficient transformation of words from a dictionary file. These rules can be customized to apply common password patterns, such as capitalizing the first letter and appending digits or symbols. This is the most efficient way to test for the described password patterns. Incremental mode is a brute-force attack that tries all character combinations. Single crack mode uses information from the user's account details (like the username) to guess passwords. Mask attacks are a feature more prominently used in tools like Hashcat to define a specific password structure for brute-forcing.
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What are rule-based transformations in John the Ripper?
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How are custom rule sets created for John the Ripper?
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How do rule sets in John the Ripper differ from brute force attacks?