Public Mosaic C2 indicators
confirmed host

172.237.66.166

Slivercommand-and-control server · :31337, :8443, :443

On AS63949.

listed last confirmed feed checked TLP:CLEAR Suricata rules Show in the live feed

Relations

Values this address shares with other hosts in this archive, rarest first. A shared value says the hosts were set up alike, not that one operator runs them.

SharedValueOther hosts
Issuance cohort7022c563de38_7022c563de38_bf0f0589fc03_b2db06dc38aa_424245fc77d33 other hosts · 3 listed
JA4X template000000000000_7022c563de38_bf0f0589fc0380 other hosts · 71 listed
JA4X template000000000000_7c32fa18c13e_bf0f0589fc03139 other hosts · 134 listed
JA4X template7022c563de38_7022c563de38_bf0f0589fc03770 other hosts · 631 listed

Not shared with any other host in this archive: 3 certificates.

Network context

SharedValueOther hosts
NetworkAS63949 · Akamai Connected Cloud27 other hosts · 27 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-21
In this archive since2026-09-21
Ports3 · 3 listed
Evidence3 certificates
Look up elsewhereVirusTotal · Shodan · Censys
About this listingWhat a listing means · Is this your address?

Ports

This address answered on 3 ports. First seen and last confirmed dates are per row, by UTC day.

PortFirst seenLast confirmedStatusTLS certificateJA4X
:31337 · Sliver defaultlistedc8acf4129e377022c563de38_7022c563de38_bf0f0589fc03
:8443 · alt-HTTPSlistedd62cc150b1f4000000000000_7022c563de38_bf0f0589fc03
:443 · HTTPSlistedf7973664528e000000000000_7c32fa18c13e_bf0f0589fc03

Observation history

Listed on 40 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :31337 and 2 more

2026-08-292026-10-30

  • first seen to last confirmed
  • listed after its last confirmation

A marked day is a UTC day the feed listed this address. The feed keeps a listener for up to 90 days after its last confirmation, so a listed day is not a confirmation. A listener no longer in the feed is drawn to its last confirmation.

Listed days as dates
  • 2026-09-21 – 2026-10-30 (40 days)

Evidence

Each certificate, configuration and file appears once, with the listeners that carried it.

TLS certificate c8acf4129e37

On :31337.

tls certificatec8acf4129e377df9fad0039bd270dbbcb2aa84da360a1a7d1b5be569603cbe9a
cert subjectmultiplayer
cert issueroperators
cert validity2026-02-09 → 2029-02-08
cert typeissuer-signed
cert key256-bit
cert serial (hex)cb2f0a5703ba61f2e50bb45dc1acf169
cert serial (decimal)270077530814789012137793120675390353769
cert namesmultiplayer

The names above are what the certificate asserts, signed by the issuer it names, which may be a public certificate authority, a private one, or one a builder ships. This site verifies none of it, so treat a name here as a lead to investigate, never an attribution.

TLS certificate d62cc150b1f4

On :8443.

tls certificated62cc150b1f42a80fb47e0955c6ac61a24988634a83042e4ceae0f5bdcd8717b
cert subject172.237.66.166
cert validity2026-01-07 → 2028-01-07
cert typeissuer-signed
cert key521-bit
cert serial (hex)96aecb6b108bae8949344c74143ccf6d
cert serial (decimal)200291784832805996328630386300903280493
cert names172.237.66.166

The names above are what the certificate asserts, signed by an issuer it does not name, so nothing shows that anyone checked them. Treat a familiar name as a lead to investigate, never an identity.

TLS certificate f7973664528e

On :443.

tls certificatef7973664528e4d59487cbc16228383d69079f9150a1d46c0dfee75ccd08e6a83
cert subjectlocalhost
cert subject orgfair lilac, enterprises
cert validity2026-02-21 → 2029-02-20
cert typeissuer-signed
cert key4096-bit
cert serial (hex)1fa3acb18dc468d1f757efae192b59db
cert serial (decimal)42055914898984992920329992193056659931
cert nameslocalhost

The names above are what the certificate asserts, signed by an issuer it does not name, so nothing shows that anyone checked them. Treat a familiar name as a lead to investigate, never an identity.

Listeners

Each listener below shows its status and what sets it apart. Dates are in Ports; certificates, configurations and files in Evidence. Common to all 3 listeners:

serviceip-port · tcp
networkAS63949 · Akamai Connected Cloud
confidence100 / 100

172.237.66.166:31337 · Sliver

listed · certificate c8acf4129e37

cohortshared issuance template · 4 hosts

172.237.66.166:8443 · Sliver

listed · certificate d62cc150b1f4

172.237.66.166:443 · Sliver

listed · certificate f7973664528e

Hosts sharing a value with this one

847 other hosts in this archive share at least one value with this one. Each is listed once, under its first shared value in Relations order. Dates and status are from the records that share a value. Showing the 40 that rank first. Every host shown is labelled Sliver, as this one is.

AddressSharesLast confirmedStatus
Issuance cohort · 3 other hosts · 3 listed

A shared value says the hosts were set up alike, not that one operator runs them.

193.8.215.90issuance cohort · 2 JA4X templateslisted
45.207.219.249issuance cohort · JA4X templatelisted
23.94.252.26issuance cohort · JA4X templatelisted
JA4X template 000000000000_7022c563de38_bf0f0589fc03 · 80 other hosts · 71 listed

These hosts’ certificates share one JA4X template, which points to the same certificate tooling. It is not evidence of a single operator.

Of these, 1 is listed under an earlier value and 42 are past the 40 hosts shown.

178.128.21.543 JA4X templateslisted
8.219.149.2223 JA4X templateslisted
139.196.57.1203 JA4X templateslisted
1.14.73.1183 JA4X templateslisted
182.255.45.503 JA4X templateslisted
203.88.118.1923 JA4X templateslisted
178.208.94.2133 JA4X templateslisted
178.208.92.73 JA4X templateslisted
95.142.37.2343 JA4X templateslisted
45.38.20.1513 JA4X templateslisted
64.176.41.2413 JA4X templateslisted
118.195.163.2273 JA4X templateslisted
66.42.33.2243 JA4X templateslisted
77.42.75.2303 JA4X templateslisted
45.74.36.1533 JA4X templateslisted
62.60.159.1533 JA4X templateslisted
38.60.220.1122 JA4X templateslisted
154.219.103.1892 JA4X templateslisted
68.64.178.1302 JA4X templateslisted
52.175.50.1822 JA4X templateslisted
64.23.254.2052 JA4X templateslisted
104.253.79.1172 JA4X templateslisted
103.242.12.1432 JA4X templateslisted
137.116.136.692 JA4X templateslisted
82.165.218.732 JA4X templateslisted
101.132.66.502 JA4X templateslisted
121.78.127.2322 JA4X templateslisted
51.75.62.522 JA4X templateslisted
172.86.94.942 JA4X templateslisted
43.134.169.1032 JA4X templateslisted
172.105.103.2232 JA4X templateslisted
172.245.111.2072 JA4X templateslisted
192.155.92.2112 JA4X templateslisted
38.60.179.312 JA4X templateslisted
82.25.63.332 JA4X templateslisted
91.199.32.352 JA4X templateslisted
104.192.82.162 JA4X templateslisted

Deploy

Suricata rules and hunt queries for this address’s 3 listed listeners.

Suricata rules

Each query searches the last 30 days of your logs for connections to these listeners. Queries hold only addresses, ports and file hashes.

Microsoft Defender XDR (KQL)
DeviceNetworkEvents
| where Timestamp > ago(30d)
| where (RemoteIP == "172.237.66.166" and RemotePort in (443, 8443, 31337))
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "172.237.66.166" and DestinationPort in (443, 8443, 31337))
Splunk (SPL, CIM data models)
| tstats summariesonly=false count min(_time) as first_time max(_time) as last_time
    from datamodel=Network_Traffic where earliest=-30d
    ((All_Traffic.dest_ip="172.237.66.166" (All_Traffic.dest_port=443 OR All_Traffic.dest_port=8443 OR All_Traffic.dest_port=31337)))
    by All_Traffic.src_ip All_Traffic.dest_ip All_Traffic.dest_port
Elastic (EQL)
network where
  (destination.ip == "172.237.66.166" and destination.port in (443, 8443, 31337))

Cite this record

Plain text, for a ticket or a report
Address 172.237.66.166 Family Sliver (command-and-control server) Ports :443, :8443, :31337 Status listed (feed checked 2026-10-30 18:37 UTC) First seen 2026-09-21 Last confirmed 2026-09-30 Record https://publicmosaic.com/ip/172.237.66.166 Source Public Mosaic, TLP:CLEAR