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 PracticalSwan/agent-skills --skill infostealer-malware-detectorgit clone --depth 1 https://github.com/PracticalSwan/agent-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/practicalswan/agent-skills/infostealer-malware-detector)<a href="https://agentmods.dev/skills/practicalswan/agent-skills/infostealer-malware-detector"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/infostealer-malware-detector/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/practicalswan/agent-skills/infostealer-malware-detector"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/infostealer-malware-detector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Prompt Injection · line 178 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
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 | $0.00115 | $0.02334 |
| Opus 5 | $0.00057 | $0.01167 |
| Sonnet 5 | $0.00023 | $0.00467 |
| Haiku 4.5 | $0.00012 | $0.00233 |
Grade A, and why
infostealer-malware-detector scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s --request GET "https://www.virustotal.com/api/v3/files/${HASH}" --header "x-apikey: $VT_API_KEY" How it starts
The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Infostealer Malware Detector & Remover (v1.1)
Tech Stack Target / Version: Windows Defender CLI, VirusTotal, MalwareBazaar, Python 3.8+, and cross-platform shell tooling.
Overview
This skill gives OpenClaw a complete workflow to search every file on the system, identify infostealer indicators, compute secure hashes, and verify them against live public databases.
Core principles (strict)
- Primary detection: Targeted file search + SHA-256 hashing + VirusTotal/MalwareBazaar checks.
- AV usage: Windows Defender (mpcmdrun.exe) or any other AV is permitted only when necessary (hash checks inconclusive, high suspicion remains, or user explicitly requests deeper scan).
- Never default to AV – the agent must complete the full custom hash workflow first and document why AV escalation is needed.
- Full user confirmation required before any quarantine or AV scan.
- Full audit trail and quarantine before removal.
When to activate automatically
-
"My passwords are being stolen"
-
"Scan for infostealer / stealer malware"
-
"Check if RedLine / Vidar / Lumma is on my PC"
-
"Clean my system" (but follow custom-first rule)
-
Leverage native parallel subagent dispatch and 200k+ context windows where available.
Prerequisites
- Internet connection (for hash lookups)
- Optional but highly recommended: free VirusTotal API key (
VT_API_KEY) - Python 3.8+ (for
scripts/hash-checker.py) - Admin/root privileges for full system scan
- Windows Defender enabled by default on Windows (no installation needed)
Step-by-Step Workflow (Custom Method First – Always)
Step 1: Scope the System & Identify High-Risk Areas
Run targeted discovery (fast & effective for infostealers):
# Windows (PowerShell)
Get-ChildItem -Path "$env:TEMP","$env:APPDATA","$env:LOCALAPPDATA","C:\ProgramData","C:\Users\*\AppData" -Recurse -File -Include *.exe,*.dll,*.bat,*.ps1,*.vbs,*.js -ErrorAction SilentlyContinue | Select-Object FullName,LastWriteTime,Length
# macOS / Linux
find /tmp ~/Library /Library /Users/*/Library /var/tmp -type f \( -name "*.exe" -o -name "*.dylib" -o -name "*.so" -o -name "*.sh" \) -mtime -30 2>/dev/null
What ships with it
4 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.
- 4d ago Changed f9dc18cdff99
- 6d ago Changed 43edd28f2a42
- 9d ago First seen · 209 lines · 115 tokens per session scan A c148fc2ec2bb
infostealer-malware-detector is a skill published in the GitHub repository PracticalSwan/agent-skills (14 stars, last pushed 4d ago), licensed MIT. It adds 115 tokens to every session and 2,334 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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