analyzing-command-and-control-communication SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
analyzing-command-and-control-communication from 26zl/cybersec-toolkit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add 26zl/cybersec-toolkit/analyzing-command-and-control-communication@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- 26zl/cybersec-toolkit
- Path
.claude/skills/analyzing-command-and-control-communication/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Jun 2, 2026
- Size
- 14,474 bytes
- Repository stars
- 87
- License
- MIT
'Analyzes malware command-and-control (C2) communication protocols to.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Analyzing Command-and-Control Communication ## When to Use - Reverse engineering a malware sample has revealed network communication that needs protocol analysis - Building network-level detection signatures for a specific C2 framework (Cobalt Strike, Metasploit, Sliver) - Mapping C2 infrastructure including primary servers, fallback domains, and dead drops - Analyzing encrypted or encoded C2 traffic to understand the command set and data format - Attributing malware to a threat actor based on C2 infrastructure patterns and tooling **Do not use** for general network anomaly detection; this is specifically for understanding known or suspected C2 protocols from malware analysis. ## Prerequisites - PCAP capture of malware network traffic (from sandbox, network tap, or full packet capture) - Wireshark/tshark for packet-level analysis - Reverse engineering tools (Ghidra, dnSpy) for understanding C2 code in the malware binary - Python 3.8+ with `scapy`, `dpkt`, and `requests` for protocol analysis and replay - Threat intelligence databases for C2 infrastructure correlation (VirusTotal, Shodan, Censys) - JA3/JA3S fingerprint databases for TLS-based C2 identification ## Workflow …
Read the whole file at its exact version.
How to install
mdr add 26zl/cybersec-toolkit/analyzing-command-and-control-communication@sha256:2ca93af31f3cb063The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lxdouprtjraxdll5)
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Versions
The registry has recorded 1 version of this file, committed on Jun 2, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (14474 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
26zl/cybersec-toolkit · 87 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lxdouprtjraxdll5 GET https://markdownregistry.com/api/v1/resolve?ref=26zl/cybersec-toolkit/analyzing-command-and-control-communication GET https://markdownregistry.com/api/v1/blob/2ca93af31f3cb0633cf8b5d0da45d0c25058944c0796434af503bbf6cd307046
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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