Threat Hunting Guide

How to Detect ARP Spoofing in PCAP Files

Automate MITRE ATT&CK T1557.002 (Adversary-in-the-Middle) and Active Scanning detection without writing complex Wireshark filters.

The Challenge: Manual Packet Hunting

Detecting an Adversary-in-the-Middle (AitM) attack in a massive network dump is like finding a needle in a haystack. Traditional forensic workflows are often too slow to catch active threats before data exfiltration occurs.

Time Sink

Correlating MAC conflicts with gateway IPs (e.g., 192.168.1.1) manually takes hours of tedious work.

Complexity

Identifying Active Scanning (T1595) requires complex Wireshark filters or custom Zeek/Suricata scripts.

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"While incident responders struggle with arp.duplicate-address-detected filters, the attacker has already gained persistent access to the segment."

The Solution: AI-Driven Automated Forensics

Pcap AI eliminates manual packet hunting by applying machine-learning models to your raw traffic data. Within seconds, it reconstructs the network topology and surfaces behavioral anomalies.

  • ARP Cache Poisoning: Identified host 192.168.1.105 maliciously claiming the MAC address of the subnet gateway.
  • Active Reconnaissance: Endpoint 192.168.1.104 flagged for aggressive TCP SYN scans across the local segment.
  • MITRE Mapping: Every finding is automatically mapped to T1557.002 and T1595 tactics for instant compliance reporting.
  • Immediate Containment: Get precise isolation data to revoke switch port access or quarantine infected endpoints before data leaves the perimeter.

Wireshark Manual Analysis vs. Pcap AI

Manual (Wireshark)

Setting display filters, exporting endpoint lists, and manual correlation. Process takes 30–60 mins.

Pcap AI

Instant extraction and automated threat mapping. Process takes less than 15 seconds.

*Based on a 500MB PCAP file analysis.

Frequently Asked Questions

Why is manual ARP detection in Wireshark unreliable?

Manual filtering for arp.duplicate-address-detected only flags conflicts as they happen. Pcap AI performs a global heuristic analysis of the entire ARP state machine, catching subtle poisoning attempts that simple filters often miss.

What is MITRE ATT&CK T1557.002?

It refers to ARP Cache Poisoning (Adversary-in-the-Middle), where an attacker intercepts traffic by spoofing ARP messages on a local network.

AI Analysis Output (Sample)

AI Analysis Proof for How to Detect ARP Spoofing in PCAP Files
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