yr1.c.lencr.org - URL scan, 22 Aug 2026
MalwareAnalyzer by Cyble scanned yr1.c.lencr.org and returned a unknown verdict (score -12). The page resolved to 104.18.21.213 on Cloudflare, Inc. in US. The domain was registered 2244 days ago through Cloudflare, Inc.. 2 domains and 1 IP were contacted. 6 malware samples communicate with this URL (Mikey, Upatre, Zusy, Docusign112101). This is a point-in-time observation from 22 Aug 2026; the page may have changed since.
Scan result
- Verdict: unknown (score -12) · Confidence 15%
- Scanned URL:
https://yr1.c.lencr.org/ - Domain: yr1.c.lencr.org · IP: 104.18.21.213 · AS13335 · US
- Server: cloudflare
- Page title: 404: Let's Encrypt CRLs for prod yr1.
- HTTP status: 404 · text/html
- Registrar: Cloudflare, Inc. · domain age 2244 days · created 2020-06-29
- TLS issuer: C=US, O=Google Trust Services, CN=WE1 · valid to Oct 1 13: · subject CN=yr1.c.lencr.org
- Scan tier: fast · observed 2026-08-22 05:23:14 UTC
Malware communicating with this URL (6)
These samples were observed contacting or being served from yr1.c.lencr.org. Each links to its full analysis.
- Mikey - contacted ·
dbe6eb8fa069c3edcea4a87b1193539b· first seen 2026-08-22 - Upatre - contacted ·
9a06299a0cad9e8cd8e4506d4e1445e1· first seen 2026-08-21 - Zusy - contacted ·
1294bcc0aad6e4319ed471b44a6fbb98· first seen 2026-08-21 - Upatre - contacted ·
64214942d830e92fb33e8d6c70fbe1ee· first seen 2026-08-21 - Docusign112101 - contacted ·
a0da18c7940d3c9ce5c21ec0269bba94· first seen 2026-08-20 - Razy - contacted ·
3fe2643c26ba51b2daa4cda28cc0dba3· first seen 2026-08-19
Antivirus & YARA (0 of 48 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
- yr1.c.lencr.org
- letsencrypt.org
- 104.18.21.213
- https://yr1.c.lencr.org/
- https://letsencrypt.org/favicon.ico
- https://letsencrypt.org/docs/lencr.org/
Other scans of yr1.c.lencr.org (8)
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 ·
http://yr1.c.lencr.org/113.crl - 21 Aug 2026 - unknown ·
http://yr1.c.lencr.org/84.crl - 21 Aug 2026 - unknown ·
http://yr1.c.lencr.org/103.crl - 21 Aug 2026 - unknown ·
http://yr1.c.lencr.org/48.crl - 21 Aug 2026 - unknown ·
http://yr1.c.lencr.org/84.crl - 20 Aug 2026 - unknown
- 20 Aug 2026 - unknown ·
http://yr1.c.lencr.org/118.crl - 19 Aug 2026 - unknown ·
http://yr1.c.lencr.org/68.crl
Questions about yr1.c.lencr.org
- Is yr1.c.lencr.org safe?
- The scan of yr1.c.lencr.org on 22 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 yr1.c.lencr.org?
- 6 analysed samples communicate with this URL, including Mikey, Upatre, Zusy, Docusign112101.
- How was yr1.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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