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Hunt Tls C2

Category: Security  ·  Sub-category: network-security  ·  Last updated:
Hunt for malicious TLS in Suricata eve.json (event_type:tls). Detects DGA / high-entropy / word-list SNI, IP-literal and malformed SNI, high-abuse TLDs (.xyz/.cc/.cyou/.sbs/.cfd/.top/.online/.icu/etc.), IP-literal and invalid cert Subject/Issuer CN, self-signed and OpenSSL-default certificates (subject==issuer, "Internet Widgits", "Default City", CN=localhost/0.0.0.0), then correlates each suspicious SNI to event_type:flow via flow_id to surface long-lived C2 sessions (flow.age > 5 min) and repetitive single-destination beacons, and pivots on shared JA3/JA4 fingerprints. Prints a structured report with an evidence table. Use when asked to hunt malicious/C2/DGA TLS, find suspicious SNI or certificates, or triage HTTPS beaconing in a Suricata log.
Security BStatic scan: minor findingsHow grading works ›

From the source SKILL.md

Detect, correlate, and report suspicious TLS activity from a Suricata eve.json log. The hunt fuses name-based signals (SNI, certificate Subject/Issuer) with behavioural signals (flow age, repetition, byte volume) and fingerprint signals (JA3/JA4), because any single axis produces false positives on modern CDNs.

What this skill does

Hunt Tls C2 is a community-contributed Claude Code skill in the network-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/hunt-tls-c2/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when asked to hunt malicious/C2/DGA TLS, find suspicious SNI or certificates, or triage HTTPS beaconing in a Suricata log.

Who uses this skill

The Hunt Tls C2 Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 176,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/hunt-tls-c2
curl -L https://claudskills.com/skills/hunt-tls-c2/SKILL.md \
  -o ~/.claude/skills/hunt-tls-c2/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/hunt-tls-c2/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/hunt-tls-c2/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\hunt-tls-c2\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

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See pricing → Download desktop app

Frequently asked questions

How do I install the Hunt Tls C2 Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/hunt-tls-c2/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Hunt Tls C2 skill do?
Hunt for malicious TLS in Suricata eve.json (event_type:tls). Detects DGA / high-entropy / word-list SNI, IP-literal and malformed SNI, high-abuse TLDs (.xyz/.cc/.cyou/.sbs/.cfd/.top/.online/.icu/etc.), IP-literal and invalid cert Subject/Issuer CN, self-signed and OpenSSL-default certificates (subject==issuer, "Internet Widgits", "Default City", CN=localhost/0.0.0.0), then correlates each suspicious SNI to event_type:flow via flow_id to surface long-lived C2 sessions (flow.age > 5 min) and repetitive single-destination beacons, and pivots on shared JA3/JA4 fingerprints. Prints a structured report with an evidence table. Use when asked to hunt malicious/C2/DGA TLS, find suspicious SNI or certificates, or triage HTTPS beaconing in a Suricata log.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Hunt Tls C2 skill?
Use Hunt Tls C2 when your Claude Code task falls under the Security category — specifically in the network security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Hunt Tls C2" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Hunt Tls C2 skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Hunt Tls C2 is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
StamusNetworks. (2026). Hunt Tls C2 [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/hunt-tls-c2/
BibTeX
@misc{hunt-tls-c2-2026,
  author    = {StamusNetworks},
  title     = {Hunt Tls C2 [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/hunt-tls-c2/}
}

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Security scan

Grade B · scanned 2026-08-05 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 2 of 10 categories (network, obfuscation), including a high-severity pattern. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

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Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

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