サイバー犯罪捜査において、フォレンジックアナリストは企業のネットワークからデータ窃盗の証拠を発見しました。攻撃者は高度な技術を用いて痕跡を隠蔽し、デジタルフットプリントを消去しているため、侵害の発生源の追跡は困難です。このシナリオにおいて、捜査官が犯人を効果的に特定し訴追するために、コンピュータフォレンジックのどのような目的に重点を置くべきでしょうか?
正解:D
According to the CHFI v11 Computer Forensics Fundamentals , one of the primary objectives of computer forensics is to identify, preserve, analyze, and present digital evidence , even when adversaries deliberately attempt to conceal or destroy it. In cybercrime cases involving data theft, attackers often employ anti- forensics techniques such as file deletion, log wiping, data overwriting, encryption, and artifact obfuscation to evade detection and attribution.
The ability to recover deleted files and hidden data is therefore critical. CHFI v11 emphasizes that deleted data is rarely immediately destroyed; instead, file system pointers are removed while the underlying data may still exist in unallocated space, slack space, or backup structures. Forensic techniques such as file carving , analysis of unallocated disk space , examination of shadow copies , and recovery of hidden or encrypted containers allow investigators to reconstruct attacker activity and uncover intent, timelines, and methods used during the breach.
Other options listed are not objectives of computer forensics as defined by CHFI. Weather analysis, market forecasting, and physical security assessments fall outside the scope of digital forensic investigations. CHFI v11 explicitly identifies data recovery and reconstruction of erased digital footprints as essential for establishing accountability and ensuring evidence admissibility in legal proceedings.
Therefore, to effectively identify and prosecute perpetrators who attempted to erase evidence, investigators must focus on recovering deleted files and hidden data , making Option D the correct and CHFI-verified answer.