デジタルフォレンジック調査において、侵入されたシステム上で、何度も削除を試みたものの、永続的なマルウェアが発見されました。マルウェアはシステムの再起動時に再インストールされ、高度な永続化メカニズムが存在していることが示唆されています。
デジタルフォレンジックにおいて、マルウェアの持続性を特定することが重要なのはなぜですか?
正解:A
This question maps directly to CHFI v11 objectives under Malware Forensics, specifically malware persistence mechanisms and behavior analysis. Persistent malware is designed to survive system reboots and removal attempts by embedding itself into startup locations, registry keys, scheduled tasks, services, boot sectors, or firmware. CHFI v11 emphasizes that identifying persistence mechanisms is a critical step in malware analysis and incident response.
From a forensic perspective, understanding how malware maintains persistence allows investigators to fully eradicate the threat and prevent reinfection. If persistence artifacts are not identified and removed, the malware can continuously reinstall itself, rendering cleanup efforts ineffective and allowing attackers to maintain long-term access. CHFI v11 highlights registry- based persistence, startup folders, services, cron jobs, launch agents, and boot-level persistence as common techniques that must be analyzed.
Additionally, identifying persistence helps investigators reconstruct the attack timeline, understand attacker intent, and determine the scope of compromise.