virustotal

virustotal is a skill for Claude Code, Codex from vectra-ai-research/vectra-soc-agent-starter. It costs 182 tokens per session (4,221 once invoked), scanned A, original, MIT.

A lookup tool that checks IP addresses, domains, URLs, and file hashes against VirusTotal, a service that collects security reports about potentially harmful files and internet indicators.

In plain words
What is it for?
Use it for one-off or investigation-based VirusTotal lookups of indicators of compromise, including network addresses, websites, and file hashes.
Why use it?
It adds reputation context to a suspicious indicator, helping an analyst judge whether it has been reported as malicious or seen in other security investigations.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit Use it for one-off or investigation-based VirusTotal lookups of indicators of compromise, including network addresses, websites, and file hashes.

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Install with agentmods
npx agentmods add skills/vectra-ai-research/vectra-soc-agent-starter/virustotal
Install

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.

Any agent
npx skills add vectra-ai-research/vectra-soc-agent-starter --skill virustotal
Clone the repo
git clone --depth 1 https://github.com/vectra-ai-research/vectra-soc-agent-starter

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for virustotal

README.md
[![agentmods](https://agentmods.dev/badge/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal/github.svg)](https://agentmods.dev/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal)
Your own site
<a href="https://agentmods.dev/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal"><img src="https://agentmods.dev/badge/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal/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.

agentmods 80×15 button for virustotal

Your own site · 80×15
<a href="https://agentmods.dev/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal"><img src="https://agentmods.dev/badge/skills/vectra-ai-research/vectra-soc-agent-starter/virustotal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 182 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,221 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00182 $0.04221
Opus 5 $0.00091 $0.02110
Sonnet 5 $0.00036 $0.00844
Haiku 4.5 $0.00018 $0.00422

Measured 12d ago against content hash 099a9dbf2ec0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

virustotal 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 12d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/virustotal.sh, scripts/vt-lookup.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

description: Enriches Vectra findings with VirusTotal threat intelligence — IOC reputation lookup for IPs, domains, URLs, and file hashes via the VirusTotal v3 API. Ships two paths — a standalone Bash CLI (scripts/vt-loo
skills/virustotal/SKILL.md · 350 lines

How it starts

The opening of the file, as written. The whole thing — 350 lines — stays where its author put it; the contents beside it link to each section on GitHub.

VirusTotal — IOC Lookup & TI Enrichment

This skill wires the agent into the VirusTotal v3 API for IOC enrichment. It ships a Bash adapter (scripts/virustotal.sh) that exposes a single function — virustotal_enrich — designed to be sourced by a host IOC-enrichment workflow (the agent's outer set -euo pipefail Bash runner that loops over a list of IOCs and dispatches per-IOC to multiple intel sources).

The adapter handles: API-key presence check → IOC-type guard → type-specific URL construction (file hash / IP / domain / URL) → authenticated GET → JSON parse → normalized result emission with a compact one-line summary.


Use this skill when

  • The user pastes an IOC (IPv4 / IPv6, domain, URL, file hash) and asks "is it known bad?" / "look it up in VirusTotal".
  • A vectra-investigator playbook-<category>.md lands a TP-leaning verdict and the analyst wants external corroboration before escalating.
  • A vectra-hunt TI-driven hunt produces hits whose IOCs need reputation context for the final report.
  • You're building or running a multi-source IOC-enrichment workflow that sources this adapter alongside other vendor adapters (the function is drop-in compatible with any framework that provides the helper contract documented below).

Do not use this skill to:

  • Override Vectra's behavioral verdict — reputation does not make a TP into a BTP or vice versa.
  • Hunt across the Vectra tenant — that's vectra-hunt.
  • Triage a Vectra detection end-to-end — that's vectra-investigator (which loads the matching playbook-<category>.md).

Prerequisites

Requirement Notes
VirusTotal API key Public (free, low rate) or Premium. Exposed to the adapter as the VT_API_KEY environment variable. Never hard-code the key in scripts or commit it.
curl Used by the host framework's adapter_fetch_json_or_error.
jq Used inline for response summarization.
base64 Required only for URL IOCs (VirusTotal expects URL IOCs as URL-safe base64 of the canonical URL). The adapter degrades gracefully and emits a base64 utility missing error if absent.
Bash 4+ [[ ]], arrays, local declarations.
Host workflow framework The adapter calls helper functions (see "Framework contract" below). It does not stand alone.

Read the full file on GitHub · 350 lines

Files

What ships with it

2 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.

Changes

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.

  1. 12d ago First seen · 350 lines · 182 tokens per session scan A 099a9dbf2ec0

Subscribe to this mod's changes

virustotal is a skill published in the GitHub repository vectra-ai-research/vectra-soc-agent-starter (2 stars, last pushed 4d ago), licensed MIT. It adds 182 tokens to every session and 4,221 once invoked, about $0.0009 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 2026-08-31.

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