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https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
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mukul975
38 lines
1.8 KiB
Python
38 lines
1.8 KiB
Python
#!/usr/bin/env python3
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"""PCAP Forensic Analyzer - Analyzes packet captures for forensic investigation."""
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import json, os, sys
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from collections import defaultdict, Counter
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from datetime import datetime
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try:
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from scapy.all import rdpcap, IP, TCP, UDP, DNS, DNSQR
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except ImportError:
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print("Install scapy: pip install scapy"); sys.exit(1)
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def analyze_pcap(pcap_path: str, output_dir: str) -> str:
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os.makedirs(output_dir, exist_ok=True)
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packets = rdpcap(pcap_path)
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convos = defaultdict(lambda: {"pkts": 0, "bytes": 0})
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dns_queries = []
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protocols = Counter()
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for pkt in packets:
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if IP in pkt:
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key = tuple(sorted([pkt[IP].src, pkt[IP].dst]))
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convos[key]["pkts"] += 1; convos[key]["bytes"] += len(pkt)
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if TCP in pkt: protocols[f"TCP/{pkt[TCP].dport}"] += 1
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elif UDP in pkt: protocols[f"UDP/{pkt[UDP].dport}"] += 1
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if DNS in pkt and pkt[DNS].qr == 0 and DNSQR in pkt:
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dns_queries.append({"query": pkt[DNSQR].qname.decode(errors="replace").rstrip("."),
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"src": pkt[IP].src if IP in pkt else ""})
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top_convos = sorted([{"src": k[0], "dst": k[1], **v} for k, v in convos.items()],
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key=lambda x: x["bytes"], reverse=True)[:50]
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report = {"total_packets": len(packets), "conversations": top_convos,
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"dns_queries": dns_queries[:200], "protocols": dict(protocols.most_common(30))}
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out = os.path.join(output_dir, "pcap_analysis.json")
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with open(out, "w") as f: json.dump(report, f, indent=2)
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print(f"[*] Packets:{len(packets)} Convos:{len(convos)} DNS:{len(dns_queries)}")
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return out
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if __name__ == "__main__":
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if len(sys.argv) < 3: print("Usage: process.py <pcap> <output>"); sys.exit(1)
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analyze_pcap(sys.argv[1], sys.argv[2])
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