Final answer:
The Volatility plugin used to identify unloaded kernel modules is modscan, useful in memory forensics to detect hidden or unlinked kernel modules such as rootkits and other malware.
Step-by-step explanation:
The Volatility plugin that could be used to identify unloaded kernel modules is modscan. Volatility is a framework for memory forensics. When analyzing a memory dump, identifying kernel modules that were previously loaded but are no longer present in the list of active modules can provide insights into potential rootkits or malicious activities. The modscan plugin scans through the memory image and lists kernel modules that have been loaded at some point but are not currently linked to the kernel module list, thus highlighting those that have been unloaded.
Using modscan helps in discovering hidden or unlinked kernel modules, which can be crucial in forensic investigations. This analysis can uncover the presence of rootkits and other forms of malware that may attempt to cloak themselves. It is important for forensic analysts to know how to utilize this plugin and interpret its output effectively to detect any signs of system tampering.