OSN

Host

45.87.53.6

Tags: Blocklisted Botnet C2

As of our latest check on 2026-06-27, 45.87.53.6 (STAR FAX GROUP PTE LTD, AS142637, Singapore) had 3 open ports (22, 443, 8443) and 22 known CVEs. It is on 2 current blocklists.

Known CVEs on this host

3open ports
0names pointing here
22known CVEs
0known exploited

Open ports and CVEs as of our latest check of this host, 2026-06-27.

CVEs by severity: HIGH 5 MEDIUM 10 LOW 7

A match is an indication, not proof: it is based on the software version a service reported, and fixes are often backported without changing the version. See the list

Not counted: 14 fixed by the distribution (openssh 8.9p1). See them

Network
STAR FAX GROUP PTE LTD AS142637
Open ports
22, 443, 8443 · at our latest check, 2026-06-27
Location
Singapore SG
Route
45.87.53.0/24 · announced by STAR FAX GROUP PTE LTD AS142637 no RPKI authorisation
Organisation
STARFAX TELECOMMUNICATIONS
Registry network
PLTP · 45.87.53.0 - 45.87.53.255 · RIPE
Abuse contact
[email protected] · for PLTP
First seen
2026-06-27 07:16 UTC
Last seen alive
2026-06-27 07:19 UTC
Hosted domains
No host name points here

Reputation

Blocklists
blocklisted on 2 current lists About blocklists
ListCategoryListed networkSince
malware command-and-control endpoints · Cobalt Strike botnet command and control 45.87.53.6/32:443 2026-06-09
malware command-and-control endpoints · Cobalt Strike botnet command and control 45.87.53.6/32:8443 2026-06-11

Services (3)

22/tcp SSH OpenSSH_8.9p1 22 CVEs first 2026-06-27 · last 2026-06-27
Server
SSH-2.0-OpenSSH_8.9p1 Ubuntu-3ubuntu0.15
Host key
ssh-ed25519 7737005500909ef6…
Raw response 
SSH-2.0-OpenSSH_8.9p1 Ubuntu-3ubuntu0.15
443/tcp TLS first 2026-06-27 · last 2026-06-27
TLS
TLSv1.2
Certificate for
*.tpedu2metricstw.dpdns.org, tpedu2metricstw.dpdns.org
Issued by
CloudFlare, Inc.
Valid
2026-06-09 → 2041-06-05
Raw response 
HTTP/1.1 400 Bad Request
Server: nginx/1.18.0 (Ubuntu)
Date: Sat, 27 Jun 2026 07:16:16 GMT
Content-Type: text/html
Content-Length: 666
Connection: close

<html>
<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<center>The plain HTTP request was sent to HTTPS port</center>
<hr><center>nginx/1.18.0 (Ubuntu)</center>
</body>
</html>
<!-- a padding to disable MSIE and Chrome friendly error page -->
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<!-- a padding to disable MSIE and Chrome friendly error page -->
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8443/tcp TLS first 2026-06-27 · last 2026-06-27
TLS
TLSv1.2
Certificate for
*.tpedu2metricstw.dpdns.org, tpedu2metricstw.dpdns.org
Issued by
CloudFlare, Inc.
Valid
2026-06-09 → 2041-06-05

Vulnerabilities

Fixed by the distribution (14)

The distribution's security data says the package revision this service shows already has the fix for these CVEs, or that its build is not affected. They are not counted.

CVEs by severity: CRITICAL 2 HIGH 3 MEDIUM 5 LOW 4

CVESoftware
CVE-2023-28531 CRITICAL 9.8 openssh 8.9p1 · port 22
CVE-2023-38408 CRITICAL 9.8 openssh 8.9p1 · port 22
CVE-2024-6387 HIGH 8.1 openssh 8.9p1 · port 22
CVE-2026-35385 HIGH 8.1 openssh 8.9p1 · port 22
CVE-2026-35414 HIGH 8.1 openssh 8.9p1 · port 22
CVE-2025-26465 MEDIUM 6.8 openssh 8.9p1 · port 22
CVE-2023-51385 MEDIUM 6.5 openssh 8.9p1 · port 22
CVE-2026-35387 MEDIUM 6.5 openssh 8.9p1 · port 22
CVE-2023-48795 MEDIUM 5.9 openssh 8.9p1 · port 22
CVE-2023-51384 MEDIUM 5.5 openssh 8.9p1 · port 22
CVE-2025-32728 LOW 3.8 openssh 8.9p1 · port 22
CVE-2025-61984 LOW 3.6 openssh 8.9p1 · port 22
CVE-2025-61985 LOW 3.6 openssh 8.9p1 · port 22
CVE-2026-35388 LOW 2.5 openssh 8.9p1 · port 22

Port history

Every port that has answered a connection on this address, and when. A port is listed as open above only when a service was identified on it. Times are UTC.

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