Anthropic Cybersecurity Skills is a library of structured cybersecurity procedures for AI agents, covering security domains and mappings to established security frameworks. It is for authorized security analysis, penetration testing, incident response, research, defense, and education across compatible AI platforms. The catalogue entries package parts of this library as agent skills, instructions, or a plugin.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill analyzing-macro-malware-in-office-documentsgit clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-SkillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mukul975/anthropic-cybersecurity-skills/analyzing-macro-malware-in-office-documents)<a href="https://agentmods.dev/skills/mukul975/anthropic-cybersecurity-skills/analyzing-macro-malware-in-office-documents"><img src="https://agentmods.dev/badge/skills/mukul975/anthropic-cybersecurity-skills/analyzing-macro-malware-in-office-documents/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mukul975/anthropic-cybersecurity-skills/analyzing-macro-malware-in-office-documents"><img src="https://agentmods.dev/badge/skills/mukul975/anthropic-cybersecurity-skills/analyzing-macro-malware-in-office-documents.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00090 | $0.03088 |
| Opus 5 | $0.00045 | $0.01544 |
| Sonnet 5 | $0.00018 | $0.00618 |
| Haiku 4.5 | $0.00009 | $0.00309 |
Grade A, and why
analyzing-macro-malware-in-office-documents scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
7 near-identical copies found in the catalogue:
- analyzing-macro-malware-in-office-documents — 100% identical, 0 lines differ
- analyzing-macro-malware-in-office-documents — 97% identical, 14 lines differ
- analyzing-macro-malware-in-office-documents — 97% identical, 14 lines differ
- analyzing-macro-malware-in-office-documents — 94% identical, 39 lines differ
- analyzing-macro-malware-in-office-documents — 94% identical, 39 lines differ
- analyzing-macro-malware-in-office-documents — 94% identical, 39 lines differ
- analyzing-macro-malware-in-office-documents — 94% identical, 39 lines differ
How it starts
The opening of the file, as written. The whole thing — 346 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Analyzing Macro Malware in Office Documents
When to Use
- A suspicious Office document (.doc, .docm, .xls, .xlsm, .ppt) has been flagged by email security
- Investigating phishing campaigns that deliver weaponized Office documents
- Extracting VBA macro code to identify the payload download URL and execution method
- Analyzing obfuscated VBA code to understand the full attack chain
- Determining if a document uses DDE, ActiveX, or remote template injection instead of macros
Do not use for analyzing non-macro Office threats (DDE, remote template injection); while this skill covers detection of these, specialized analysis may be needed.
Prerequisites
- Python 3.8+ with oletools installed (
pip install oletools) - oledump.py from Didier Stevens (https://blog.didierstevens.com/programs/oledump-py/)
- Isolated analysis VM without Microsoft Office installed (prevents accidental execution)
- XLMDeobfuscator for Excel 4.0 macro analysis (pip install xlmdeobfuscator)
- LibreOffice for safe document rendering (does not execute VBA macros by default)
Workflow
Step 1: Initial Document Triage
Determine if the document contains macros or other active content:
# Quick triage with olevba
olevba suspect.docm
# Check for OLE streams and macros
oleid suspect.docm
# Output indicators:
# VBA Macros: True/False
# XLM Macros: True/False
# External Relationships: True/False (remote template)
# ObjectPool: True/False (embedded objects)
# Flash: True/False (SWF objects)
# Comprehensive OLE analysis
oledump.py suspect.docm
# List all OLE streams with macro indicators
# Streams marked with 'M' contain VBA macros
# Streams marked with 'm' contain macro attributes
Step 2: Extract and Analyze VBA Code
Pull out the complete VBA macro source:
# Extract VBA with full deobfuscation
olevba --decode --deobf suspect.docm
# Extract just the VBA source code
olevba --code suspect.docm > extracted_vba.txt
# Detailed extraction with oledump
oledump.py -s 8 -v suspect.docm # Stream 8 (adjust based on stream listing)
# Extract all macro streams
oledump.py -p plugin_vba_dco suspect.docm
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 346 lines · 90 tokens per session scan A f63202e005d9
analyzing-macro-malware-in-office-documents is a skill published in the GitHub repository mukul975/Anthropic-Cybersecurity-Skills (32,631 stars, last pushed 11d ago), licensed Apache-2.0. It adds 90 tokens to every session and 3,088 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
analyzing-macro-malware-in-office-documents
Analyzes malicious VBA macros embedded in Microsoft Office documents (Word, Excel, PowerPoint) to identify download cradles, payload execution, persistence mechanisms, and anti-analysis techniques. Uses olevba, oledump, and VBA deobfuscation to extract the attack chain. Activates for requests involving Office macro…
analyzing-macro-malware-in-office-documents
Analyzes malicious VBA macros embedded in Microsoft Office documents (Word, Excel, PowerPoint) to identify download cradles, payload execution, persistence mechanisms, and anti-analysis techniques. Uses olevba, oledump, and VBA deobfuscation to extract the attack chain. Activates for requests involving Office macro…
analyzing-macro-malware-in-office-documents
A malware-analysis workflow for examining harmful VBA macros embedded in Microsoft Word, Excel, and PowerPoint files. It uses tools that extract, decode, and inspect the macros and their attack chain.
analyzing-macro-malware-in-office-documents
Analyzes malicious VBA macros embedded in Microsoft Office documents (Word, Excel, PowerPoint) to identify download cradles, payload execution, persistence mechanisms, and anti-analysis techniques. Uses olevba, oledump, and VBA deobfuscation to extract the attack chain. Activates for requests involving Office macro…
analyzing-macro-malware-in-office-documents
Analyzes malicious VBA macros embedded in Microsoft Office documents (Word, Excel, PowerPoint) to identify download cradles, payload execution, persistence mechanisms, and anti-analysis techniques. Uses olevba, oledump, and VBA deobfuscation to extract the attack chain. Activates for requests involving Office macro…
analyzing-macro-malware-in-office-documents
Analyzes malicious VBA macros embedded in Microsoft Office documents (Word, Excel, PowerPoint) to identify download cradles, payload execution, persistence mechanisms, and anti-analysis techniques. Uses olevba, oledump, and VBA deobfuscation to extract the attack chain. Activates for requests involving Office macro…