Public Mosaic C2 indicators
confirmed host

156.254.20.47

Cobalt Strikecommand-and-control server · :10807, :5998, :5996

On AS153706. Its certificate is shared with 53 other hosts.

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 server keyfed26edc75be700350ef67015ba3ed352 other hosts · 2 listed
TLS certificate56a06a233bd30f693de25ef12cc19e8b2c92d3eb97dd969a2578df084c37647853 other hosts · 53 listed
Issuance cohort2166164053c1_2166164053c1_30d204a01551_60e4afe8b719_4c8172b9dba553 other hosts · 53 listed
JA4X template2166164053c1_2166164053c1_30d204a01551420 other hosts · 417 listed
Cobalt Strike watermark66666666689 other hosts · 89 listed

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

Network context

SharedValueOther hosts
/24156.254.20.0/242 other hosts · 2 listed
NetworkAS153706 · Stack Network Sdn. Bhd5 other hosts · 5 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-27
In this archive since2026-09-27
Ports3 · 3 listed
Evidence1 certificate · 2 beacon configurations · 2 files served
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 certificateJA4XConfiguration
:10807listed56a06a233bd32166164053c1_2166164053c1_30d204a01551
:5998listedbeacon 1
:5996listedbeacon 2

Observation history

Listed on 34 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :10807
  3. :5998
  4. :5996

2026-08-292026-10-30

  • first seen to last confirmed

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
  • 2026-09-27 – 2026-10-30 (34 days)

Evidence

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

TLS certificate 56a06a233bd3

On :10807.

tls certificate56a06a233bd30f693de25ef12cc19e8b2c92d3eb97dd969a2578df084c376478
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2022-08-30 → 2022-11-28
cert typeself-signed
cert key2048-bit
cert serial (hex)27530dfe
cert serial (decimal)659754494

The names above are what the certificate claims, not proof that this host owns them. Treat a familiar name as a likely impersonation.

Beacon configurations

2 configurations on 2 listeners. Common to both:

callback156.254.20.46 · set in the beacon by its builder; may be a redirector or a borrowed name
beacon typeHTTP
cs versionCobalt Strike 4.9 (Sep 19, 2023)
postPOST /submit.php
sleep60s ±0%
watermark666666666
server key md5fed26edc75be700350ef67015ba3ed35
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Each configuration calls back on its own listener’s port. Where they differ:

Configurationgetuser-agent
Beacon 1 · :5998GET /g.pixelMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; UHS)
Beacon 2 · :5996GET /cmMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET4.0C; .NET4.0E)

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
networkAS153706 · Stack Network Sdn. Bhd
confidence100 / 100

156.254.20.47:10807 · Cobalt Strike

listed · certificate 56a06a233bd3

cohortshared issuance template · 54 hosts

156.254.20.47:5998 · Cobalt Strike

listed · beacon 1

156.254.20.47:5996 · Cobalt Strike

listed · beacon 2

Hosts sharing a value with this one

453 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 Cobalt Strike, as this one is.

AddressSharesLast confirmedStatus
Cobalt Strike server key · 2 other hosts · 2 listed

Every beacon carries its team server’s public key. Hosts sharing one were set up from the same server installation, or from a leaked or cracked copy that ships its key file, so it is not evidence of a single operator.

156.254.20.48server key · certificate · issuance cohort · JA4X template · watermarklisted
156.254.20.46server key · certificate · issuance cohort · JA4X template · watermarklisted
TLS certificate · 53 other hosts · 53 listed

These hosts presented the same certificate. Leaked or resold profiles reuse certificates, so this is not evidence of a single operator.

Of these, 2 are listed under an earlier value and 13 are past the 40 hosts shown.

113.250.188.15certificate · issuance cohort · JA4X template · watermarklisted
60.247.206.23certificate · issuance cohort · JA4X templatelisted
47.120.32.72certificate · issuance cohort · JA4X template · watermarklisted
43.136.19.18certificate · issuance cohort · JA4X templatelisted
192.3.251.109certificate · issuance cohort · JA4X templatelisted
192.253.229.133certificate · issuance cohort · JA4X templatelisted
139.196.201.58certificate · issuance cohort · JA4X templatelisted
134.122.204.168certificate · issuance cohort · JA4X templatelisted
107.148.237.76certificate · issuance cohort · JA4X templatelisted
124.223.22.132certificate · issuance cohort · JA4X templatelisted
111.228.5.127certificate · issuance cohort · JA4X template · watermarklisted
185.184.70.41certificate · issuance cohort · JA4X templatelisted
120.48.18.226certificate · issuance cohort · JA4X templatelisted
8.137.169.91certificate · issuance cohort · JA4X templatelisted
47.93.243.161certificate · issuance cohort · JA4X templatelisted
114.215.190.105certificate · issuance cohort · JA4X templatelisted
123.56.124.3certificate · issuance cohort · JA4X templatelisted
47.98.124.244certificate · issuance cohort · JA4X templatelisted
106.12.61.28certificate · issuance cohort · JA4X templatelisted
43.243.73.187certificate · issuance cohort · JA4X templatelisted
103.12.148.37certificate · issuance cohort · JA4X templatelisted
139.196.111.118certificate · issuance cohort · JA4X template · watermarklisted
146.19.216.170certificate · issuance cohort · JA4X templatelisted
146.19.216.163certificate · issuance cohort · JA4X templatelisted
175.124.145.102certificate · issuance cohort · JA4X template · watermarklisted
154.94.237.203certificate · issuance cohort · JA4X templatelisted
64.7.199.195certificate · issuance cohort · JA4X templatelisted
134.122.203.247certificate · issuance cohort · JA4X templatelisted
1.15.76.39certificate · issuance cohort · JA4X templatelisted
95.182.114.29certificate · issuance cohort · JA4X templatelisted
150.158.102.111certificate · issuance cohort · JA4X template · watermarklisted
111.230.37.219certificate · issuance cohort · JA4X templatelisted
42.194.241.92certificate · issuance cohort · JA4X templatelisted
82.156.242.28certificate · issuance cohort · JA4X templatelisted
154.219.101.56certificate · issuance cohort · JA4X templatelisted
8.148.201.210certificate · issuance cohort · JA4X templatelisted
121.40.37.49certificate · issuance cohort · JA4X templatelisted
47.95.192.147certificate · issuance cohort · JA4X templatelisted
Issuance cohort · 53 other hosts · 53 listed

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

Of these, 40 are listed under an earlier value and 13 are past the 40 hosts shown.

JA4X template · 420 other hosts · 417 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, 40 are listed under an earlier value and 380 are past the 40 hosts shown.

Cobalt Strike watermark · 89 other hosts · 89 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, 8 are listed under an earlier value and 81 are past the 40 hosts shown.

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.

FileConfirmedDelivered onFile last seen
2553da57e1d0bd617271a039d954a7094514a835728edf2bf8cc8097827e0d69analysed:5996
8a44b3b857e4f282200a8ad90826f0d8af43c82af2f7043818d1285855ac01b7analysed:5998

Neighbourhood · 156.254.20.0/24 · 2 other hosts

2 other hosts in this archive are in the same /24, shown for context.

156.254.20.46Cobalt Strike156.254.20.48Cobalt Strike

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 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 == "156.254.20.47" and RemotePort in (5996, 5998, 10807))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("2553da57e1d0bd617271a039d954a7094514a835728edf2bf8cc8097827e0d69", "8a44b3b857e4f282200a8ad90826f0d8af43c82af2f7043818d1285855ac01b7")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "156.254.20.47" and DestinationPort in (5996, 5998, 10807))
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="156.254.20.47" (All_Traffic.dest_port=5996 OR All_Traffic.dest_port=5998 OR All_Traffic.dest_port=10807)))
    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="2553da57e1d0bd617271a039d954a7094514a835728edf2bf8cc8097827e0d69" OR Filesystem.file_hash="8a44b3b857e4f282200a8ad90826f0d8af43c82af2f7043818d1285855ac01b7")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "156.254.20.47" and destination.port in (5996, 5998, 10807))
file where file.hash.sha256 in ("2553da57e1d0bd617271a039d954a7094514a835728edf2bf8cc8097827e0d69", "8a44b3b857e4f282200a8ad90826f0d8af43c82af2f7043818d1285855ac01b7")

Cite this record

Plain text, for a ticket or a report
Address 156.254.20.47 Family Cobalt Strike (command-and-control server) Ports :5996, :5998, :10807 Status listed (feed checked 2026-10-30 18:37 UTC) First seen 2026-09-27 Last confirmed 2026-10-30 Record https://publicmosaic.com/ip/156.254.20.47 Source Public Mosaic, TLP:CLEAR