Is index.crates.io safe?

The scan of index.crates.io on 11 Aug 2026 reached no verdict either way (score -12). Too little was captured to judge it, which is an unknown rather than a pass.

What malware is associated with index.crates.io?

1 analysed samples communicate with this URL, including HUILoader.

How was index.crates.io checked?

A static pass resolved DNS, captured TLS and headers and followed the redirect chain, and where the fast tier allows, a headless browser rendered the page and recorded every request. Egress is SSRF-locked. Signatures that matched only page text are weighted far below one that matched a served file, because a page documenting malware matches the same rules.

index.crates.io - URL scan, 11 Aug 2026

MalwareAnalyzer by Cyble scanned index.crates.io and returned a unknown verdict (score -12). The page resolved to 199.232.138.137. 7 domains and 1 IP were contacted. 1 malware sample communicates with this URL (HUILoader). This is a point-in-time observation from 11 Aug 2026; the page may have changed since.

Scan result

Verdict: unknown (score -12) · Confidence 15%
Scanned URL: https://index.crates.io/
Domain: index.crates.io · IP: 199.232.138.137
Server: AmazonS3
Page title: The crates.io package index
HTTP status: 200 · text/html
TLS issuer: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Atlas R3 DV TLS CA 2025 Q4 · valid to Jan 5 14: · subject CN=index.crates.io
Scan tier: fast · observed 2026-08-11 12:44:44 UTC

Malware communicating with this URL (1)

These samples were observed contacting or being served from index.crates.io. Each links to its full analysis.

HUILoader - referenced · 067a07924d740d821810d15a694b1b7c · first seen 2026-08-11

Why this verdict

Valid TLS, no impersonation or off-origin credential post

Detected technologies

Fastly

Contacted infrastructure

199.232.138.137 - AS54113 Fastly, Inc. (Australia)

Observed indicators

index.crates.io
cdnjs.cloudflare.com
crates.io
doc.rust-lang.org
rust-lang.github.io
github.com
www.rust-lang.org
199.232.138.137
https://index.crates.io/
https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.6.1/github-markdown.min.css
https://crates.io/
https://doc.rust-lang.org/cargo
https://rust-lang.github.io/rfcs/2789-sparse-index.html
https://github.com/rust-lang/crates.io-index
https://doc.rust-lang.org/cargo/reference/registry-index.html#index-format
https://www.rust-lang.org/governance/teams/dev-tools#team-crates-io

Other scans of index.crates.io (8)

This host has been scanned before. Each scan is a separate observation, so a verdict here does not carry over to the others.

19 Aug 2026 - unknown
17 Aug 2026 - unknown
15 Aug 2026 - unknown
15 Aug 2026 - unknown
13 Aug 2026 - unknown
13 Aug 2026 - unknown
12 Aug 2026 - unknown
12 Aug 2026 - unknown

Questions about index.crates.io

Is index.crates.io safe?: The scan of index.crates.io on 11 Aug 2026 reached no verdict either way (score -12). Too little was captured to judge it, which is an unknown rather than a pass.
What malware is associated with index.crates.io?: 1 analysed samples communicate with this URL, including HUILoader.
How was index.crates.io checked?: A static pass resolved DNS, captured TLS and headers and followed the redirect chain, and where the fast tier allows, a headless browser rendered the page and recorded every request. Egress is SSRF-locked. Signatures that matched only page text are weighted far below one that matched a served file, because a page documenting malware matches the same rules.

Scanned at the fast tier - see how URL scanning works.

Scan another URL · Latest analyzed threats · All scans of index.crates.io

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