Public Mosaic C2 indicators
confirmed host

156.238.233.131

AdaptixCobalt Strikecontrollers · :4321, :50022

On AS401696.

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

SharedValueOther hosts
Cobalt Strike watermark987654321166 other hosts · 166 listed

A Cobalt Strike watermark is a weak link: cracked and leaked builds share one.

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

Network context

SharedValueOther hosts
NetworkAS401696 · cognetcloud39 other hosts · 39 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-22
In this archive since2026-09-22
Ports2 · 2 listed
Evidence1 beacon configuration · 2 files served
Look up elsewhereVirusTotal · Shodan · Censys
About this listingWhat a listing means · Is this your address?

Ports

This address answered on 2 ports, across 2 families. First seen and last confirmed dates are per row, by UTC day.

PortFamilyFirst seenLast confirmedStatusConfiguration
:4321Adaptixlisted
:50022Cobalt Strikelistedbeacon

Observation history

Listed on 39 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :4321
  3. :50022

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
  • 2026-09-22 – 2026-10-30 (39 days)

Evidence

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

Beacon configuration

On :50022.

callback156.238.233.131 · same as this host
beacon port50022
beacon typeHTTP
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /j.ad
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; MANM; MANM)
sleep60s ±0%
watermark987654321
server key md5bd64b33304a8d90778c18f1255cd388d
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Listeners

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

serviceip-port · tcp
networkAS401696 · cognetcloud
confidence100 / 100

156.238.233.131:4321 · Adaptix

listed

jarm29d29d00000000000043d43d00043dc3b2afa8a5ec09b510a8559aff7899fb

156.238.233.131:50022 · Cobalt Strike

listed · beacon

Hosts sharing a value with this one

166 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.

AddressFamilySharesLast confirmedStatus
Cobalt Strike watermark · 166 other hosts · 166 listed

The watermark identifies the Cobalt Strike licence a beacon was built with. Cracked and leaked builds share watermarks widely, so it is not evidence of a single operator.

Of these, 126 are past the 40 hosts shown.

101.200.193.211Cobalt Strikewatermarklisted
119.45.160.160Cobalt Strikewatermarklisted
85.175.101.203Cobalt Strikewatermarklisted
111.231.116.164Cobalt Strikewatermarklisted
165.154.225.239Cobalt Strikewatermarklisted
43.108.51.124Cobalt Strikewatermarklisted
222.255.215.42Cobalt Strikewatermarklisted
179.43.186.214Cobalt Strikewatermarklisted
111.170.148.141Cobalt Strikewatermarklisted
106.13.189.138Cobalt Strikewatermarklisted
82.158.89.75Cobalt Strikewatermarklisted
82.158.89.214Cobalt Strikewatermarklisted
49.51.230.17Cobalt Strikewatermarklisted
38.76.183.197Cobalt Strikewatermarklisted
23.238.82.42Cobalt Strikewatermarklisted
183.60.226.2Cobalt Strikewatermarklisted
124.223.188.23Cobalt Strikewatermarklisted
8.163.98.217Cobalt Strikewatermarklisted
46.19.140.50Cobalt Strikewatermarklisted
43.203.112.69Cobalt Strikewatermarklisted
38.76.190.209Cobalt Strikewatermarklisted
20.109.163.207Cobalt Strikewatermarklisted
175.178.126.48Cobalt Strikewatermarklisted
118.126.95.117Cobalt Strikewatermarklisted
117.72.220.70Cobalt Strikewatermarklisted
106.55.253.229Cobalt Strikewatermarklisted
101.35.217.145Cobalt Strikewatermarklisted
14.225.212.124Cobalt Strikewatermarklisted
154.37.218.73Cobalt Strikewatermarklisted
115.190.250.28Cobalt Strikewatermarklisted
120.55.93.58Cobalt Strikewatermarklisted
101.34.208.175Cobalt Strikewatermarklisted
45.192.248.45Cobalt Strikewatermarklisted
118.89.79.131Cobalt Strikewatermarklisted
8.146.227.247Cobalt Strikewatermarklisted
43.139.108.161Cobalt Strikewatermarklisted
101.42.136.73Cobalt Strikewatermarklisted
192.255.248.153Cobalt Strikewatermarklisted
150.187.25.242Cobalt Strikewatermarklisted
217.194.133.89Cobalt Strikewatermarklisted

Samples served · 2 files

Files this address was seen serving, each identified by running or analysing it. A widely distributed file can reach unrelated hosts.

Every file here was served on :50022.

FileConfirmedFile last seen
1534c6328dd3d5d70d1217f3ceea0441c455e8b1d3bfd7b01d571cbeee96d577analysed
97a53ef2b1c8934046cf9023e3fe236c840764b14b2d4e4cbe584bcee7e92228analysed

Deploy

Suricata rules and hunt queries for this address’s 2 listed listeners.

Suricata rules

Each query searches the last 30 days of your logs for connections to these listeners and for the 2 files this address served. Queries hold only addresses, ports and file hashes.

Microsoft Defender XDR (KQL)
DeviceNetworkEvents
| where Timestamp > ago(30d)
| where (RemoteIP == "156.238.233.131" and RemotePort in (4321, 50022))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("1534c6328dd3d5d70d1217f3ceea0441c455e8b1d3bfd7b01d571cbeee96d577", "97a53ef2b1c8934046cf9023e3fe236c840764b14b2d4e4cbe584bcee7e92228")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "156.238.233.131" and DestinationPort in (4321, 50022))
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="156.238.233.131" (All_Traffic.dest_port=4321 OR All_Traffic.dest_port=50022)))
    by All_Traffic.src_ip All_Traffic.dest_ip All_Traffic.dest_port
| tstats summariesonly=false count min(_time) as first_time max(_time) as last_time
    from datamodel=Endpoint.Filesystem where earliest=-30d
    (Filesystem.file_hash="1534c6328dd3d5d70d1217f3ceea0441c455e8b1d3bfd7b01d571cbeee96d577" OR Filesystem.file_hash="97a53ef2b1c8934046cf9023e3fe236c840764b14b2d4e4cbe584bcee7e92228")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "156.238.233.131" and destination.port in (4321, 50022))
file where file.hash.sha256 in ("1534c6328dd3d5d70d1217f3ceea0441c455e8b1d3bfd7b01d571cbeee96d577", "97a53ef2b1c8934046cf9023e3fe236c840764b14b2d4e4cbe584bcee7e92228")

Cite this record

Plain text, for a ticket or a report
Address 156.238.233.131 Family Adaptix, Cobalt Strike Ports :4321, :50022 Status listed (feed checked 2026-10-30 20:07 UTC) First seen 2026-09-22 Last confirmed 2026-10-17 Record https://publicmosaic.com/ip/156.238.233.131 Source Public Mosaic, TLP:CLEAR