Malware Analysis

Back to Main

Overview

Malware analysis is the study of malicious software to understand its behavior, identify its capabilities, and develop detection and prevention methods. This section covers various types of malware, analysis techniques, and defensive strategies.

Categories Covered

1. Ransomware - File-encrypting malware
2. Trojans - Deceptive malware
3. Rootkits - System-hiding malware
4. Keyloggers - Credential stealers
5. Worms - Self-replicating malware (planned)
6. Botnets - Controlled networks of malware (planned)

Malware Types

Analysis Methodologies

1. Static Analysis

• Examining code without execution
• File fingerprinting (hashes)
• String analysis
• PE header examination
• Disassembly

2. Dynamic Analysis

• Executing in sandbox environment
• Behavior monitoring
• Network traffic analysis
• Process monitoring
• Registry/file system changes

3. Memory Analysis

• RAM forensics
• Process dumping
• Rootkit detection
• In-memory payloads

Analysis Tools

Static Analysis Tools

• PE Studio - PE file analysis
• IDA Pro - Disassembler
• Ghidra - Reverse engineering
• Strings - Extract strings
• DIE - Detect It Easy

Dynamic Analysis Tools

• Cuckoo Sandbox - Automated analysis
• ProcMon - Process monitor
• Wireshark - Network analysis
• RegShot - Registry comparison
• API Monitor - API call tracking

Memory Analysis

• Volatility - Memory forensics
• Rekall - Memory analysis
• LiME - Memory acquisition

Malware Lifecycle

flowchart LR

    %% Initial Access
    A[Infection Vector]
    A1[Phishing Email]
    A2[Malicious Attachment]
    A3[Drive-by Download]
    A4[Exploited Vulnerability]
    A --> A1
    A --> A2
    A --> A3
    A --> A4

    %% Execution
    B[Execution]
    B1[User Opens File]
    B2[Exploit Triggered]
    B3[Macro / Script Runs]
    A --> B
    B --> B1
    B --> B2
    B --> B3

    %% Persistence
    C[Persistence]
    C1[Registry Run Keys]
    C2[Scheduled Tasks]
    C3[Startup Folder]
    C4[Service Installation]
    B --> C
    C --> C1
    C --> C2
    C --> C3
    C --> C4

    %% Command & Control
    D[Command & Control]
    D1[HTTP/HTTPS Beaconing]
    D2[DNS Tunneling]
    D3[Encrypted Channels]
    C --> D
    D --> D1
    D --> D2
    D --> D3

    %% Payload Delivery
    E[Payload Delivery]
    E1[Ransomware Deployment]
    E2[Credential Stealing]
    E3[Data Exfiltration]
    D --> E
    E --> E1
    E --> E2
    E --> E3

    %% Impact
    F[Impact]
    F1[System Encryption]
    F2[Data Theft]
    F3[Service Disruption]
    F4[Financial Loss]
    E --> F
    F --> F1
    F --> F2
    F --> F3
    F --> F4

Detection Methods

Signature-Based Detection

• Known malware patterns
• File hashes
• Behavioral signatures
• Network signatures

Heuristic Analysis

• Suspicious behavior patterns
• Code anomalies
• Anti-debugging techniques
• Packers/obfuscation

Behavioral Analysis

• File system changes
• Registry modifications
• Process injection
• Network connections

Best Practices

For Analysts

# Always analyze in isolated environment
# Use snapshots for easy restoration
# Document all findings
# Follow responsible disclosure

Prevention

• Least Privilege – Limit user permissions
• Application Whitelisting – Only allow approved software
• Regular Updates – Patch vulnerabilities promptly
• Email Filtering – Block malicious attachments
• User Training – Recognize social engineering attacks

---

Safety Warnings

⚠️ CRITICAL: Malware analysis is dangerous!

• ❌ NEVER analyze malware on production systems
• ✅ ALWAYS use isolated virtual machines (VMs) with network isolation
• 🚫 DISABLE shared folders and clipboard access
• 💾 USE snapshots before execution
• 👀 MONITOR for escape attempts
• 📋 FOLLOW strict lab safety protocols

---

References

• Malware Analysis Fundamentals
• Practical Malware Analysis
• OWASP Malware Threats
• VirusTotal
• Hybrid Analysis