Malware Network Traffic Analysis
Guides an agent through analyzing malware PCAP captures to find C2, exfiltration and beaconing
- Repository
- mukul975/Anthropic-Cybersecurity-Skills
- Stars
- 35,430
- Licence
- Apache-2.0
- Files
- 3 files
What it does
When installed, this skill gives an AI agent a structured playbook for examining network captures (PCAP files) recorded while malware ran in a sandbox or during an incident. The agent works through steps such as summarising traffic, checking DNS for suspicious or algorithmically generated domains, inspecting HTTP and TLS for command-and-control and downloads, spotting periodic beaconing, and drafting Suricata/Snort detection rules. A bundled Python helper computes entropy and extracts TCP payload streams with dpkt or scapy.
Great for
- Security analysts and incident responders reviewing a PCAP from a malware sandbox
- Detection engineers who need to turn observed C2 patterns into Suricata or Snort rules
- Students learning how malware network behaviour is investigated with Wireshark, tshark and Zeek
Skip it if
- Host-based malware analysis such as process behaviour or memory forensics; the skill itself says to use sandbox reports or Volatility instead
- Analysing live malware on a production network without isolation, since the commands and rules assume a controlled setup and could expose systems
- Anyone expecting a turnkey automated verdict; the output depends on the analyst interpreting results
Try asking
- “Analyze this malware.pcap from our sandbox run and identify any C2 domains or beaconing”
- “Check the DNS queries in this capture for DGA-style domain names”
- “Write Suricata rules to detect the HTTP POST C2 pattern seen in this traffic”
- “Summarise the protocols and top talkers in this PCAP file”
Install in 3 steps
- 1
Download the skill
The ZIP contains the 3 original files, the Apache-2.0 licence and an attribution note.
analyzing-network-traffic-of-malware.zip - 2
Add it to your agent
Claude Code (all projects)
mkdir -p ~/.claude/skills && unzip analyzing-network-traffic-of-malware.zip -d ~/.claude/skills/Claude Code / Agent SDK (this project only)
mkdir -p .claude/skills && unzip analyzing-network-traffic-of-malware.zip -d .claude/skills/Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.
- 3
Ask for the task
No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.
Get better results
- Run the analysis inside an isolated analysis workstation, and treat captured payloads and suspicious domains as hazardous
- Check the generated Suricata rules and sample IOCs yourself before deploying them, since the examples use placeholder domains and hashes
- Provide the PCAP path and the sandbox context (time window, victim host) so the agent can focus its queries
What's inside
- references/api-reference.md
- scripts/agent.py
- SKILL.md
Redistributed unmodified from mukul975/Anthropic-Cybersecurity-Skills under the Apache-2.0 licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.