Memory Forensics with Volatility 3: Investigating Fileless Malware

Why Memory Forensics?

Modern malware increasingly operates entirely in memory. Fileless techniques avoid writing to disk, making traditional file-based forensics ineffective. Memory forensics captures the runtime state of a system — the only place where fileless malware can be observed.

Volatility 3 is the industry-standard tool for memory forensics. It provides plugins for extracting processes, network connections, registry hives, and other artifacts from memory dumps.

Acquiring Memory

Before analysis, you need a memory dump. Tools like winpmem, FTK Imager, or LiME (for Linux) can capture physical memory. The key is acquiring the dump before it becomes contaminated by the acquisition tool itself.

Process Analysis

The first step in any memory investigation is process analysis. Volatility's pslist, pstree, and psxview plugins reveal the process hierarchy and can detect hidden processes — a common technique used by rootkits and advanced malware.

Detecting Fileless Techniques

Fileless malware often resides in process memory, injected into legitimate processes. Key Volatility plugins for detection include:

• malfind — Detects injected code and suspicious memory regions.
• hollowfind — Identifies process hollowing techniques.
• cmdline — Shows command-line arguments for each process.
• netscan — Reveals network connections and listening ports.

"Memory does not lie. It may be complex, it may be noisy, but it holds the truth of what happened on the system."

顺势而为，趋吉避凶