CEH Enumeration and System Hacking Practice Question
An attacker has gained access to a Windows server and wants to crack the password hashes extracted from the SAM file. The attacker knows the passwords are complex but wants to maximize speed. Which tool is BEST suited for high-speed password cracking using GPU acceleration?
⚠ Common exam trap
Candidates often confuse 'rainbow table' tools (Ophcrack, RainbowCrack) with GPU-accelerated crackers, or assume John the Ripper is always the fastest, but Hashcat is the explicit choice for maximum GPU speed in CEH scenarios.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Hashcat
Hashcat is the correct answer because it is specifically designed for high-speed password cracking using GPU acceleration, leveraging OpenCL or CUDA to offload computation to the GPU. This allows it to achieve millions of hashes per second, making it ideal for cracking complex passwords from SAM hashes (NTLM) when speed is the priority.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Ophcrack
Why it's wrong here
Ophcrack is a specialized tool primarily designed for cracking Windows NTLM hashes by utilizing precomputed rainbow tables. While effective for recovering common passwords that exist within its bundled or custom table sets, it does not perform real-time GPU-accelerated brute-force or dictionary attacks. Its reliance on precomputed data means its cracking capabilities are inherently limited by the size and scope of the available rainbow tables, making it less versatile for novel or highly complex passwords.
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RainbowCrack
Why it's wrong here
RainbowCrack is a dedicated utility focused on the generation and utilization of rainbow tables to reverse cryptographic hashes, including NTLM. Its fundamental principle involves a space-time tradeoff, where large precomputed tables allow for rapid lookup of hash-plaintext pairs. However, RainbowCrack is a table-lookup mechanism and does not leverage GPU acceleration for real-time brute-force or dictionary attacks, distinguishing it from modern, high-performance cracking engines that actively compute hashes on the fly.
- ✗
John the Ripper
Why it's wrong here
John the Ripper (JtR) is a highly versatile and widely used password cracker supporting a broad array of hash types and attack modes, including dictionary, brute-force, and hybrid strategies. While community-contributed patches and newer versions have introduced GPU acceleration for specific algorithms, its architectural design is not as inherently optimized for raw, high-throughput GPU performance across all hash types as Hashcat. Consequently, when the absolute maximum cracking speed is the paramount objective, JtR typically yields to Hashcat's superior GPU utilization.
- ✓
Hashcat
Why this is correct
Hashcat is universally recognized as the world's fastest and most advanced password recovery utility, meticulously engineered to exploit the massive parallel processing power of modern Graphics Processing Units (GPUs). It supports an extensive and ever-growing list of hash algorithms and attack modes, including dictionary, brute-force, mask, and hybrid attacks, making it exceptionally efficient for high-speed cracking operations. Its highly optimized kernel code and ability to scale across multiple GPUs position it as the premier tool for rapid password hash analysis and recovery.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CEH practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CEH exam.