Is yr2.c.lencr.org safe?

The scan of yr2.c.lencr.org on 20 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 yr2.c.lencr.org?

1 analysed samples communicate with this URL, including Bublik.

How was yr2.c.lencr.org 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.

yr2.c.lencr.org - URL scan, 20 Aug 2026

MalwareAnalyzer by Cyble scanned yr2.c.lencr.org and returned a unknown verdict (score -12). The page resolved to 104.18.21.213 on Cloudflare, Inc. in US. 2 domains and 1 IP were contacted. 1 malware sample communicates with this URL (Bublik). This is a point-in-time observation from 20 Aug 2026; the page may have changed since.

Scan result

Verdict: unknown (score -12) · Confidence 15%
Scanned URL: https://yr2.c.lencr.org/
Domain: yr2.c.lencr.org · IP: 104.18.21.213 · AS13335 · US
Server: cloudflare
Page title: 404: Let's Encrypt CRLs for prod yr2.
HTTP status: 404 · text/html
TLS issuer: C=US, O=Google Trust Services, CN=WE1 · valid to Oct 1 00: · subject CN=yr2.c.lencr.org
Scan tier: fast · observed 2026-08-20 07:02:07 UTC

Malware communicating with this URL (1)

These samples were observed contacting or being served from yr2.c.lencr.org. Each links to its full analysis.

Bublik - contacted · 238a2591f8f443e1523d536a10dd42ee · first seen 2026-08-20

Antivirus & YARA (0 of 47 engines)

No engine flagged this page's content.

Why this verdict

Valid TLS, no impersonation or off-origin credential post

Detected technologies

Cloudflare

Contacted infrastructure

104.18.21.213 - AS13335 Cloudflare, Inc. (United States)

Observed indicators

yr2.c.lencr.org
letsencrypt.org
104.18.21.213
https://yr2.c.lencr.org/
https://letsencrypt.org/favicon.ico
https://letsencrypt.org/docs/lencr.org/

Other scans of yr2.c.lencr.org (5)

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

22 Aug 2026 - unknown
22 Aug 2026 - unknown · http://yr2.c.lencr.org/123.crl
21 Aug 2026 - unknown
21 Aug 2026 - unknown · http://yr2.c.lencr.org/110.crl
20 Aug 2026 - unknown · http://yr2.c.lencr.org/109.crl

Questions about yr2.c.lencr.org

Is yr2.c.lencr.org safe?: The scan of yr2.c.lencr.org on 20 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 yr2.c.lencr.org?: 1 analysed samples communicate with this URL, including Bublik.
How was yr2.c.lencr.org 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.

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