Course 41 - Analyzing Attacks for Incident Handlers | Episode 1: Volatile Evidence, Forensic Tools, and Investigation Procedures

🧠 Memory Analysis (RAM Forensics) — Study Template🔐 Core ConceptMemory analysis is a critical part of the incident response process, used to detect threats that do not leave artifacts on disk.Key idea: Some attacks exist only in memory⚡ Why Memory Forensics MattersModern threats bypass traditional disk-based detection:

• Fileless malware
  • Executes directly in RAM
  • Leaves no files behind
• Malicious PowerShell scripts
  • Run in memory
  • Minimal or no disk footprint

🔥 If you only analyze disk → you may completely miss the attack🧬 Volatile Nature of RAMDefinition:RAM is volatile, meaning:

• Data changes constantly
• Data is lost when power is off

🧾 Evidence Found in Memory

• Credentials (passwords, tokens)
• Active network connections
• Clipboard contents
• Browser sessions/history
• Running processes
• Injected/malicious code

🔥 Memory = real-time snapshot of system activity📊 Order of VolatilityFrom MOST → LEAST volatile:

1. CPU Registers & Cache (nanoseconds)
2. RAM (live memory)
3. Network data (connections, routing tables)
4. Disk (persistent storage)

🚨 Forensic Rule:Always collect data from most volatile → least volatile🔍 Investigation WorkflowStep 1: Acquire Memory

• Capture RAM while system is live
• Do this BEFORE shutdown

Step 2: Analyze MemoryLook for:

• Suspicious processes
• Code injection
• Hidden malware
• Active connections

Step 3: Correlate FindingsCombine with:

• Disk forensics
• Network analysis
• Malware analysis

🔥 Memory analysis is part of a holistic investigation⚖️ Forensic PrincipleLocard’s Exchange Principle“Every interaction leaves a trace”In memory forensics:

• Capturing memory alters memory
• Perfect preservation is impossible

⚠️ Implication:

• Minimize impact
• Document acquisition process

🛠️ Memory Acquisition ToolsCommon tools used to dump RAM:

• FTK Imager
• Mandiant Redline
• Velkosoft Live Capturer

Purpose:

• Capture full memory snapshot
• Enable offline forensic analysis

🧪 Practical ScenarioSituation:

• Suspicious outbound traffic
• Data exfiltration to foreign IPs
• No evidence on disk or registry

Without Memory Analysis:❌ No findingsWith Memory Analysis:✅ Identify:

• Hidden processes
• In-memory malware
• Active connections
• Credential artifacts

🧠 Key Takeaways

• Memory is volatile but critical
• Modern attacks are often fileless
• RAM contains live evidence
• Must capture memory first
• Analysis must be correlated with other forensic domains

🚨 Golden RuleDump memory first. Analyze everything else after.

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