Public Mosaic C2 indicators
confirmed host

47.121.130.18

Cobalt Strikecommand-and-control server · :8443, :8080

On AS37963.

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 watermark39114493842 other hosts · 42 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
NetworkAS37963 · Hangzhou Alibaba Advertising431 other hosts · 430 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-17
In this archive since2026-09-17
Ports2 · 2 listed
Evidence2 beacon configurations · 4 files served
Look up elsewhereVirusTotal · Shodan · Censys
About this listingWhat a listing means · Is this your address?

Ports

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

PortFirst seenLast confirmedStatusConfiguration
:8443 · alt-HTTPSlistedbeacon 1
:8080 · alt-HTTPlistedbeacon 2

Observation history

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

  1. listed
  2. :8443 and 1 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
  • 2026-09-17 – 2026-10-30 (44 days)

Evidence

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

Beacon configurations

2 configurations on 2 listeners. Common to both:

callback47.121.130.18 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.7 (Aug 17, 2022)
getGET /tab_home.html
postPOST /tab_shop
user-agentMozilla/5.0 (Linux; Android 16) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.7680.154 Mobile Safari/537.36
sleep56s ±37%
watermark391144938
server key md551a34382586dd46551c8c54270c43897
inject stubb50b86d735412685eb6044ad8d01781c
spawn to x86%windir%\syswow64\svchost.exe
spawn to x64%windir%\sysnative\svchost.exe

Where they differ:

Configurationbeacon port
Beacon 1 · :84438443
Beacon 2 · :80808080

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
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100

47.121.130.18:8443 · Cobalt Strike

listed · beacon 1

47.121.130.18:8080 · Cobalt Strike

listed · beacon 2

Hosts sharing a value with this one

42 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 watermark · 42 other hosts · 42 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, 2 are past the 40 hosts shown.

123.249.100.226watermarklisted
47.105.36.109watermarklisted
47.95.201.24watermarklisted
60.247.206.23watermarklisted
39.100.66.238watermarklisted
124.223.22.132watermarklisted
39.100.64.125watermarklisted
111.230.37.219watermarklisted
39.96.201.230watermarklisted
59.110.228.141watermarklisted
47.98.124.244watermarklisted
47.94.56.71watermarklisted
60.217.23.146watermarklisted
124.221.190.127watermarklisted
62.234.75.12watermarklisted
192.144.219.65watermarklisted
103.117.136.32watermarklisted
42.194.241.92watermarklisted
154.219.101.56watermarklisted
114.66.27.110watermarklisted
80.97.160.149watermarklisted
8.166.128.186watermarklisted
47.108.25.113watermarklisted
82.156.242.28watermarklisted
167.17.47.252watermarklisted
47.95.192.147watermarklisted
39.97.57.155watermarklisted
101.43.31.60watermarklisted
180.76.141.175watermarklisted
209.200.246.194watermarklisted
8.129.25.140watermarklisted
47.113.206.140watermarklisted
8.146.207.128watermarklisted
101.200.85.0watermarklisted
154.221.25.38watermarklisted
210.56.48.227watermarklisted
106.75.249.202watermarklisted
106.55.25.253watermarklisted
43.143.13.146watermarklisted
117.72.159.96watermarklisted

Samples served · 4 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
f82790e84b60e01994b94bb43e1b52bb5d41111336159e7263a65a4f7d2fb1caanalysed:8443
3c477fafe083c9d76ad5744c685e4465b843775386fb321ac6d084ed2f82947eanalysed:8080
45099ddffc86d7cb99021daa115b3ea95b371ade714262707ff8737b4d3601adanalysed:8443
e948c3ccc1a80b062f3cbe64db0ea28e6c92d035d20bdb75c458ffd1371a5acaanalysed:8080

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 4 files this address served. Queries hold only addresses, ports and file hashes.

Microsoft Defender XDR (KQL)
DeviceNetworkEvents
| where Timestamp > ago(30d)
| where (RemoteIP == "47.121.130.18" and RemotePort in (8080, 8443))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("3c477fafe083c9d76ad5744c685e4465b843775386fb321ac6d084ed2f82947e", "45099ddffc86d7cb99021daa115b3ea95b371ade714262707ff8737b4d3601ad", "e948c3ccc1a80b062f3cbe64db0ea28e6c92d035d20bdb75c458ffd1371a5aca", "f82790e84b60e01994b94bb43e1b52bb5d41111336159e7263a65a4f7d2fb1ca")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "47.121.130.18" and DestinationPort in (8080, 8443))
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="47.121.130.18" (All_Traffic.dest_port=8080 OR All_Traffic.dest_port=8443)))
    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="3c477fafe083c9d76ad5744c685e4465b843775386fb321ac6d084ed2f82947e" OR Filesystem.file_hash="45099ddffc86d7cb99021daa115b3ea95b371ade714262707ff8737b4d3601ad" OR Filesystem.file_hash="e948c3ccc1a80b062f3cbe64db0ea28e6c92d035d20bdb75c458ffd1371a5aca" OR Filesystem.file_hash="f82790e84b60e01994b94bb43e1b52bb5d41111336159e7263a65a4f7d2fb1ca")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "47.121.130.18" and destination.port in (8080, 8443))
file where file.hash.sha256 in ("3c477fafe083c9d76ad5744c685e4465b843775386fb321ac6d084ed2f82947e", "45099ddffc86d7cb99021daa115b3ea95b371ade714262707ff8737b4d3601ad", "e948c3ccc1a80b062f3cbe64db0ea28e6c92d035d20bdb75c458ffd1371a5aca", "f82790e84b60e01994b94bb43e1b52bb5d41111336159e7263a65a4f7d2fb1ca")

Cite this record

Plain text, for a ticket or a report
Address 47.121.130.18 Family Cobalt Strike (command-and-control server) Ports :8080, :8443 Status listed (feed checked 2026-10-30 20:07 UTC) First seen 2026-09-17 Last confirmed 2026-09-20 Record https://publicmosaic.com/ip/47.121.130.18 Source Public Mosaic, TLP:CLEAR