Performing Network Forensics With Wireshark

Performing Network Forensics With Wireshark

Overview

Cybersecurity skill for performing network forensics with wireshark. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "performing network forensics with wireshark"

• "Capture and analyze network traffic using Wireshark and tshark to reconstruct ne"

• When analyzing captured network traffic (PCAP files) from a security incident

• For identifying command-and-control (C2) communications in captured traffic

• When reconstructing data exfiltration activities from packet captures

• During malware analysis to identify network indicators of compromise

• For extracting files, credentials, and artifacts transferred over the network

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• Wireshark or tshark installed for packet analysis
• PCAP/PCAPNG files from network captures (tcpdump, Wireshark, network TAP)
• NetworkMiner for automated artifact extraction
• Sufficient RAM for large capture files (1GB+ PCAPs need 8GB+ RAM)
• Understanding of TCP/IP, HTTP, DNS, TLS protocols
• GeoIP databases for IP geolocation

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}

1. Plan Operations — Define objectives, scope, and success criteria for network forensics operations.
2. Prepare Environment — Set up tools, access, and data sources required for network forensics.
3. Execute Core Workflow — Use wireshark to perform network forensics operations following established procedures.
4. Validate Results — Verify that results meet quality standards and objectives.
5. Report Findings — Document results, observations, and recommendations.
6. Follow Up — Track remediation actions and verify fixes where applicable.

Tools

• wireshark — Primary tool for this skill
• Analysis Platform — Data processing and visualization
• Collaboration Tools — Team coordination and knowledge sharing

Process

1. Reconnaissance — Gather target information, identify attack surface, enumerate services
2. Analysis/Exploitation — Execute the technique, analyze results, document findings
3. Reporting — Document IOCs, write findings, provide remediation recommendations

Verification

• All network forensics procedures executed completely and documented
• Findings validated against multiple data sources
• False positives identified and filtered
• Results documented with evidence and timestamps
• Recommendations provided with risk-based prioritization

Anti-Rationalization Table