Public Mosaic C2 indicators
confirmed host

2.27.204.21

Slivercommand-and-control server · :31337

On AS219337.

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_6ed28801f1b54 other hosts · 4 listed
JA4X template7022c563de38_7022c563de38_bf0f0589fc03770 other hosts · 631 listed

Not shared with any other host in this archive: 1 certificate.

Network context

SharedValueOther hosts
NetworkAS219337 · FZCO3 other hosts · 3 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-17
In this archive since2026-09-17
Evidence1 certificate
Look up elsewhereVirusTotal · Shodan · Censys
About this listingWhat a listing means · Is this your address?

Observation history

Listed on 44 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :31337

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
  • 2026-09-17 – 2026-10-30 (44 days)

2.27.204.21:31337 · Sliver

Last confirmed (43 days ago)

first seen2026-09-17 06:40 UTC
serviceip-port · tcp · Sliver default
networkAS219337 · FZCO
confidence100 / 100
tls certificate4fa0be19ad5cab4c31e685f50e03eb4eb268222bd3c3761545c35ed0a46a3772
cert subjectmultiplayer
cert issueroperators
cert validity2026-04-03 → 2029-04-02
cert typeissuer-signed
cert key256-bit
cert serial (hex)eb1b6902ccfd0f0ee21c54ce26d7926e
cert serial (decimal)312510900899541250278249718289222046318
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.

ja4x7022c563de38_7022c563de38_bf0f0589fc03
cohortshared issuance template · 5 hosts

Hosts sharing a value with this one

770 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 · 4 other hosts · 4 listed

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

38.146.28.168issuance cohort · JA4X templatelisted
157.245.246.149issuance cohort · JA4X templatelisted
150.109.154.3issuance cohort · JA4X templatelisted
204.12.245.170issuance cohort · JA4X templatelisted
JA4X template · 770 other hosts · 631 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, 4 are listed under an earlier value and 730 are past the 40 hosts shown.

47.116.113.15JA4X templatelisted
104.131.164.51JA4X templatelisted
177.3.43.43JA4X templatelisted
204.194.54.61JA4X templatelisted
103.185.249.13JA4X templatelisted
92.119.164.140JA4X templatelisted
45.74.31.54JA4X templatelisted
38.60.220.112JA4X templatelisted
103.121.95.90JA4X templatelisted
95.216.77.106JA4X templatelisted
89.23.102.186JA4X templatelisted
89.169.47.107JA4X templatelisted
89.106.83.157JA4X templatelisted
68.64.178.130JA4X templatelisted
65.109.195.180JA4X templatelisted
57.131.160.107JA4X templatelisted
52.194.243.16JA4X templatelisted
47.111.93.184JA4X templatelisted
47.85.195.225JA4X templatelisted
47.101.139.254JA4X templatelisted
46.16.35.120JA4X templatelisted
45.86.86.39JA4X templatelisted
45.207.219.46JA4X templatelisted
45.192.98.195JA4X templatelisted
45.141.21.199JA4X templatelisted
45.133.73.47JA4X templatelisted
45.12.114.252JA4X templatelisted
43.133.29.227JA4X templatelisted
43.130.69.135JA4X templatelisted
38.60.226.70JA4X templatelisted
38.60.125.189JA4X templatelisted
31.76.111.31JA4X templatelisted
31.76.111.236JA4X templatelisted
31.57.38.70JA4X templatelisted
31.56.228.136JA4X templatelisted
217.60.38.147JA4X templatelisted

Deploy

Suricata rules and hunt queries for this address’s 1 listed listener.

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 == "2.27.204.21" and RemotePort in (31337))
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "2.27.204.21" and DestinationPort in (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="2.27.204.21" (All_Traffic.dest_port=31337)))
    by All_Traffic.src_ip All_Traffic.dest_ip All_Traffic.dest_port
Elastic (EQL)
network where
  (destination.ip == "2.27.204.21" and destination.port in (31337))

Cite this record

Plain text, for a ticket or a report
Address 2.27.204.21 Family Sliver (command-and-control server) Ports :31337 Status listed (feed checked 2026-10-30 18:37 UTC) First seen 2026-09-17 Last confirmed 2026-09-17 Record https://publicmosaic.com/ip/2.27.204.21 Source Public Mosaic, TLP:CLEAR