Why Were 14-Character Passwords Cracked So Quickly?
Short answer
A Windows LAN Manager hashing splits a password of up to 14 characters into two separate 7-character hashes, so each half can be cracked quickly.
Question
Key Takeaways
It tests the LM hash 7-and-7 weakness in Windows SAM password storage, and the trap is assuming password length alone defeats cracking without checking the hash format.
The question tests why a 14-character Windows password policy did not prevent rapid SAM-database cracking. The answer is A: legacy LAN Manager hashing stored the password as two 7-character halves, making each half far easier to brute-force.
Common mistake: The most common wrong answer is D, assuming local accounts on a Domain Controller caused weak passwords, but the stem specifies a standalone server and the real issue is LM hash storage.
Expert Analysis
Why the Answer Is Correct
A is correct because the scenario points to legacy Windows LAN Manager password storage, where a password of up to 14 characters is effectively split into two 7-character halves. Each half is hashed separately, so a 14-character password does not create one large 14-character cracking problem; it creates two much smaller 7-character problems. After dumping the SAM database from the standalone server, a cracking tool can attack those halves with brute force or rainbow tables and recover most of them quickly. The policy change increased length, but it did not remove the underlying LM hash weakness in the exam's legacy Windows context.
Why the Other Options Are Wrong
B is wrong because the stem already gave users two weeks' notice and then waited a week after the Group Policy change; more importantly, a standalone server applies local policy and does not depend on domain-wide replication. C is wrong because Active Directory environments can still include member servers and standalone systems that use SAM for local accounts, and the scenario explicitly involves a standalone server. D is wrong because the stem does not describe a Domain Controller; it describes a standalone server, so local accounts on a Domain Controller are not the cause. The rapid cracking is explained by the hash-splitting weakness, not by slow policy replication or an empty SAM file.
Community Comment Notes
Rodine and Toni222 both explain that LM hashing splits passwords into two 7-character chunks, which makes the cracking far faster than a single long hash would suggest. Dumas reinforces the scenario detail with "No domain controller in this question" and names the weakness "7 & 7", which directly supports option A. Jashan_lefty chose D by arguing that local accounts on a Domain Controller are weaker, but that reasoning does not fit the standalone-server wording and does not explain the 99% cracking rate within an hour.
Official Reference
This link opens the official vendor documentation in a new tab.
Exam Strategy
When a stem emphasizes a long password and unusually fast cracking, check the hash algorithm before blaming policy replication. For Windows SAM questions, map 7-character halves to LM hashing and map Active Directory domain account storage to ntds.dit rather than SAM.
Frequently Asked Questions
Why does a 14-character Windows password become two 7-character LM hashes?
Does a standalone server use Group Policy and a SAM database for local accounts?
Community Votes
100% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 5 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 5
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Toni222 👍 4 Answered AThe most plausible reason the passwords were cracked so quickly is related to the way Windows stores and handles passwords, particularly with older hashing methods like LAN Manager (LM) hashes. LM hashes are known to split passwords into two 7-character chunks and hash them separately, which makes them much easier to crack than a single 14-character hash
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Rodine 👍 4Correct Answer: A. Passwords of 14 characters or less are broken up into two 7-character hashes Explanation: On Windows systems, passwords of 14 characters or less are split into two separate 7-character hashes when stored using the LAN Manager (LM) hash algorithm, which is an outdated and less secure hashing method. Here’s why this matters:
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Dumas 👍 4A is the correct answer. No domain controller in this question. Domain Controllers don't keep passwords in the SAM file. This is all about LM an NTLM passwords. The weakness is called 7 & 7.
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044f354 👍 3 Answered AA. Passwords of 14 characters or less are broken up into two 7-character hashes: Correct Windows' LAN Manager (LM) hashing splits passwords into two 7-character blocks, making them easier to crack with brute force or rainbow table attacks.
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Jashan_lefty 👍 1 Answered DThe passwords were cracked quickly because they were local accounts on the Domain Controller, which typically have weaker security measures compared to domain accounts.
Reader comments & corrections
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