CHFI OS and Network Forensics Practice Question
A forensic analyst finds multiple Prefetch files in C:\Windows\Prefetch with recent timestamps. What is the primary value of Prefetch files in an investigation?
⚠ Common exam trap
EC-Council often tests the misconception that Prefetch files contain user data or network logs, but they only store execution metadata; candidates confuse Prefetch with other artifacts like browser cache or event logs.
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
✓
They record the first and last execution times of applications
Prefetch files in Windows store metadata about application launches, including the first and last execution times. This allows forensic analysts to determine when a specific program was run, which is crucial for timeline analysis and identifying unauthorized or malicious software execution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
They store the user's web browsing history
Why it's wrong here
Web browsing history is maintained by browsers in their own structured stores—for example, Chrome/Edge use the 'History' SQLite database, Firefox uses 'places.sqlite'—and Prefetch has no role in persisting visited URLs or search terms. A Prefetch file is generated when an executable runs and records which DLLs and files were loaded to speed up subsequent starts, so at most it proves that a browser executable was launched, but it never exposes the sites the user visited. Therefore this option misidentifies the artifact's function.
- ✗
They list all network connections made by the system
Why it's wrong here
Prefetch contains a list of file paths, directory references, volume serial numbers, and execution metadata associated with a program's startup; it does not log IP addresses, ports, protocol types, remote hostnames, or TCP/UDP connection states. Those network artifacts are normally recovered from the Windows Event Log, third-party firewall logs, NetStatistics files, or network capture files, not from the .pf binary format. Mistaking Prefetch for a network-connection log confuses a performance-caching artifact with a network provenance artifact.
- ✓
They record the first and last execution times of applications
Why this is correct
Prefetch is designed as a performance mechanism, but forensically it acts as an application execution artifact: each .pf file contains a 'last run time' header field and a run count, while the file's creation timestamp indicates when the executable was first executed. This combination lets an analyst reconstruct first and last run times (and frequency) for programs like browsers, document viewers, and executables of interest, even if the system timezone offset must be accounted for during parsing. Because Prefetch files are created automatically for commonly run executables and are plain binary files, tools such as PECmd or Prefetch Parser can extract these timestamp values reliably.
- ✗
They contain the actual content of user documents
Why it's wrong here
A Prefetch file captures only the names and paths of files that an executable references during its launch (for example, a dynamic link library or a configuration file), not the internal byte-level content of user documents such as .docx or .xlsx files. Forensic recovery of actual document content comes from unallocated disk space, file system slack, temporary autosave files, or the application's own cache; Prefetch cannot be used as a source of data exfiltration evidence. Thus this option overstates the artifact's evidentiary value by confusing file-path metadata with file-content evidence.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CHFI 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 CHFI exam.