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15-blue-team-defense
67 / 100 · Review before installing
Check before installing. Some of what it can do is expected: a security skill usually runs scanners and checks websites.
By Masriyan/Claude-Code-CyberSecurity-Skill (GitHub) · security · 569 stars · scanned at commit 3aa77d8
System hardening, detection engineering, security baseline monitoring,
Works with any agent that supports SKILL.md skills.
What this skill can do
Downloads and installs other software
The author does not mention this.
Found in 3 places.
Runs commands on your computer
The author does not mention this. Expected for a security skill.
Found in 20 places.
Show 17 more
- skills/15-blue-team-defense/SKILL.md, line 162
ufw default deny incoming - skills/15-blue-team-defense/SKILL.md, line 202
find / -perm /4000 -type f 2>/dev/null | sort # SUID - skills/15-blue-team-defense/SKILL.md, line 229
apt-get install auditd - skills/15-blue-team-defense/SKILL.md, line 562
netstat -tulnap > /tmp/services_current.txt - skills/15-blue-team-defense/SKILL.md, line 577
python scripts/hardening_checker.py --os ubuntu --output report.json - skills/15-blue-team-defense/SKILL.md, line 610
apt list --upgradable 2>/dev/null | wc -l # Total upgradable - skills/15-blue-team-defense/SKILL.md, line 731
python scripts/hardening_checker.py --os ubuntu --output report.json - skills/15-blue-team-defense/scripts/hardening_checker.py, line 77
result = subprocess.run(fw_cmd.split(), capture_output=True, text=True, timeout=5) - skills/15-blue-team-defense/scripts/hardening_checker.py, line 81
except (subprocess.TimeoutExpired, FileNotFoundError, PermissionError): - skills/15-blue-team-defense/scripts/hardening_checker.py, line 107
result = subprocess.run(["systemctl", "is-active", svc], capture_output=True, text=True, timeout=3) - skills/15-blue-team-defense/scripts/hardening_checker.py, line 111
except (FileNotFoundError, subprocess.TimeoutExpired): - skills/15-blue-team-defense/scripts/hardening_checker.py, line 117
result = subprocess.run(["systemctl", "is-active", "auditd"], capture_output=True, text=True, timeout=3) - skills/15-blue-team-defense/scripts/hardening_checker.py, line 119
except (FileNotFoundError, subprocess.TimeoutExpired): - skills/15-blue-team-defense/scripts/hardening_checker.py, line 137
result = subprocess.run(["sysctl", "-n", key], capture_output=True, text=True, timeout=3) - skills/15-blue-team-defense/scripts/hardening_checker.py, line 140
except (FileNotFoundError, subprocess.TimeoutExpired): - skills/15-blue-team-defense/scripts/hardening_checker.py, line 148
loaded = subprocess.run(["lsmod"], capture_output=True, text=True, timeout=3).stdout - skills/15-blue-team-defense/scripts/hardening_checker.py, line 149
except (FileNotFoundError, subprocess.TimeoutExpired):
Changes files outside its own folder
The author does not mention this.
Found in 6 places.
Show 3 more
Sends data to these websites: live.sysinternals.com
This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.
Found in 2 places.
Safer alternatives
Low-risk skills in the same category (security) that look related. Check that one does what you need.
Install
Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.
if [ -e ~/.agents/skills/'15-blue-team-defense' ] || [ -L ~/.agents/skills/'15-blue-team-defense' ]; then echo 'A skill folder named 15-blue-team-defense already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/Masriyan/Claude-Code-CyberSecurity-Skill' "$d" && git -C "$d" checkout --quiet '3aa77d84fb64cf07b550f6be4544bb91292db89f' -- 'skills/15-blue-team-defense' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/15-blue-team-defense' ~/.agents/skills/'15-blue-team-defense' && rm -rf "$d"; fi
Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'15-blue-team-defense' ~/.claude/skills/'15-blue-team-defense' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.
Badge for your README
The badge for Masriyan/Claude-Code-CyberSecurity-Skill shows the score of its lowest-scoring skill.
[](https://zalavijaysinh.github.io/skilltrust/repos/Masriyan/Claude-Code-CyberSecurity-Skill/)
Score history
| Date | Version | Score |
|---|
| 2026-11-08 | 3aa77d8 | 67 |
| 2026-11-07 | 3aa77d8 | 67 |