Defensive Reporting
Detection and incident reporting methodology where every claim is tied to a primary source, plus detection of anti-forensic activity that attacks that evidence: log clearing and tampering (MITRE ATT&CK T1070, T1070.001, T1070.006), disabling event logging (T1562.002), and stored-data manipulation (T1565.001). Keys off Windows Security Event IDs 1102, 4719, 1100 and System 104, Sysmon Event ID 2 and process creation, and Linux auditd/journald. Gives a report structure that survives scrutiny, an evidence-hygiene and chain-of-custody checklist, source-tracing discipline, tamper-signal detection logic, a hunt for destroyed telemetry, and hardening mapped to ISO 27001 and NIST CSF 2.0. Use when writing an incident or detection report, preparing a SOC deliverable for an auditor or regulator, building an IR report template, tracing an alert claim to its log source, or hunting for cleared or tampered logs after an intrusion.
Security AStatic scan found no risk patternsHow grading works ›
What this skill does
Defensive Reporting is a community-contributed Claude Code skill in the forensics sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/defensive-reporting/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when writing an incident or detection report, preparing a SOC deliverable for an auditor or regulator, building an IR report template, tracing an alert claim to its log source, or hunting for cleared or tampered logs after an intrusion.
Who uses this skill
The Defensive Reporting 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 211,000+ 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/defensive-reporting
curl -L https://claudskills.com/skills/defensive-reporting/SKILL.md \
-o ~/.claude/skills/defensive-reporting/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/defensive-reporting/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/defensive-reporting/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\defensive-reporting\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
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Defensive Reporting Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/defensive-reporting/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Defensive Reporting skill do?
Detection and incident reporting methodology where every claim is tied to a primary source, plus detection of anti-forensic activity that attacks that evidence: log clearing and tampering (MITRE ATT&CK T1070, T1070.001, T1070.006), disabling event logging (T1562.002), and stored-data manipulation (T1565.001). Keys off Windows Security Event IDs 1102, 4719, 1100 and System 104, Sysmon Event ID 2 and process creation, and Linux auditd/journald. Gives a report structure that survives scrutiny, an evidence-hygiene and chain-of-custody checklist, source-tracing discipline, tamper-signal detection logic, a hunt for destroyed telemetry, and hardening mapped to ISO 27001 and NIST CSF 2.0. Use when writing an incident or detection report, preparing a SOC deliverable for an auditor or regulator, building an IR report template, tracing an alert claim to its log source, or hunting for cleared or tampered logs after an intrusion.
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 Defensive Reporting skill?
Use Defensive Reporting when your Claude Code task falls under the Security category — specifically in the forensics 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 Defensive Reporting" or describe the task and let Claude pick). Browse related skills at
/category/security/.
What is a Claude Code skill and how does the Defensive Reporting 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. Defensive Reporting 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
umbrasec-labs. (2026). Defensive Reporting [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/defensive-reporting/
BibTeX
@misc{defensive-reporting-2026,
author = {umbrasec-labs},
title = {Defensive Reporting [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/defensive-reporting/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/defensive-reporting/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/defensive-reporting.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/defensive-reporting.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Defensive Reporting"></iframe>
Security scan
Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/defensive-reporting/#security)
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