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Course 41 - Analyzing Attacks for Incident Handlers | Episode 4: Live Memory Forensics, VM Troubleshooting, and Malware Analysis

Course 41 - Analyzing Attacks for Incident Handlers | Episode 4: Live Memory Forensics, VM Troubleshooting, and Malware Analysis

Published 6 hours ago
Description
🧠 Live Memory Forensics Lab — Mandiant Redline (Full Workflow)🎯 Lab ObjectivePerform a real-world memory forensic investigation on an infected Windows VM using Mandiant Redline, covering:Infection → Data Collection → Transfer → Analysis → IOC Identification🧪 Lab OverviewEnvironment:
  • Target: Windows 7 Virtual Machine (infected)
  • Malware Sample: her.exe (Dyre/Dridex family behavior)
  • Tool: Mandiant Redline
⚠️ Critical Rule❌ NEVER analyze forensic data on the infected machine
✅ ALWAYS transfer to a clean analysis system🔧 Part 1: Operational Reality & Troubleshooting💣 Step 1: Execute Malware (Inside VM Only)
  • Run her.exe
  • Allow infection to occur
  • Observe system behavior (optional monitoring)
📥 Step 2: Run Redline Collector
  • Perform memory audit
  • Output size: ~9 GB
🚧 Problem: Data Transfer FailureLarge forensic data often:
  • Fails to copy
  • Gets interrupted
  • Exceeds VM limitations
🛠️ Troubleshooting Techniques1. Network ReconfigurationSwitch VM network mode:
  • From: Host-Only
  • To: NAT (Network Address Translation)
✔ Enables outbound communication
✔ Allows file transfer2. Smart Data ReductionInstead of copying full audit:
  • Locate Sessions Folder
  • Copy ONLY:
    • Sessions/ directory
🔥 Why This Works
  • Sessions folder contains analysis-ready data
  • Avoids transferring unnecessary bulk files
🧠 Key InsightReal DFIR work includes solving infrastructure problems — not just analysis🔍 Part 2: Deep-Dive Forensic Investigation🧾 Step 1: Load Data into Redline
  • Open Sessions folder
  • Begin analysis on clean machine
📊 Investigation Areas1. 🖥️ System InformationCollect:
  • Operating System
  • IP Address
  • MAC Address
  • RAM Size
  • Logged-in Users
🎯 Purpose:
  • Establish investigation baseline
  • Required for incident reporting
2. 🌐 Listening PortsAnalyze:
  • Active ports
  • Open sockets
  • External connections
🚨 Look for:
  • Unknown ports
  • Suspicious outbound traffic
  • Mapping to malicious processes
💡 Example:
  • Malware (ELC / ELIC) tied to network activity
3. 🔤 Strings & Memory ArtifactsExtract:
  • Command-line activity
  • File paths
  • Embedded indicators
🎯 Goal:
  • Identify what executed in memory
  • Reveal hidden behavior
4. 🗃️ Registry PersistenceTechnique:
  • Sort registry keys by:
    • Last Modified Time
🚨 Look for:
  • Recent suspicious changes
  • Auto-start entries
  • Persistence mechanisms
🔥 Key Insight:Attackers modify registry to survive reboot5. 🌳 Process Hierarchy (CRITICAL)Analyze process tree:Track execution flow:her.exe → spawns → ech.exe → further activity 🚨 Look for:
  • Parent-child relationships
  • Hidden or injected processes
  • Unusual process chains
💡 Example Behavior:
  • her.exe (initial payload)
  • spawns hidden process ech.exe
6. 🧬 Indicators of Compromise (IOCs)Use:
  • Known malicious hashes
  • Threat intel feeds
Redline Capabilities:
  • Auto-flag suspicious artifacts
  • Search across memory dataset
🎯 Goal:
  • Confirm malicious presence
  • Identify scope of c
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