Public Mosaic C2 indicators
confirmed host

116.62.174.16

Cobalt Strikecommand-and-control server · :50050, :81

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
JA4X template2166164053c1_2166164053c1_30d204a01551420 other hosts · 417 listed
Cobalt Strike watermark123456789018 other hosts · 18 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, 1 certificate.

Network context

SharedValueOther hosts
NetworkAS37963 · Hangzhou Alibaba Advertising431 other hosts · 430 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-22
In this archive since2026-09-22
Ports2 · 2 listed
Evidence1 certificate · 1 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. First seen and last confirmed dates are per row, by UTC day.

PortFirst seenLast confirmedStatusTLS certificateJA4XConfiguration
:50050 · Cobalt Strike team-server defaultlisted107528da6edc2166164053c1_2166164053c1_30d204a01551
:81listedbeacon

Observation history

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

  1. listed
  2. :50050
  3. :81

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

Evidence

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

TLS certificate 107528da6edc

On :50050.

tls certificate107528da6edcfb84434cbf01bb728714b8fb57d490eee32e038cd3042157a444
cert subject*.microsoft.com
cert subject orgMicrosoft Corporation
cert issuer*.microsoft.com
cert issuer orgMicrosoft Corporation
cert validity2026-09-18 → 2026-12-17
cert typeself-signed
cert key2048-bit
cert serial (hex)0acb1493
cert serial (decimal)181081235

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

Beacon configuration

On :81.

callback116.62.174.16 · same as this host
beacon port81
beacon typeHTTP
cs versionCobalt Strike 4.4 (Aug 04, 2021)
getGET /updates.rss
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)
sleep60s ±0%
watermark1234567890
server key md5cd0b07fbfc4eb02871da6e6e87e6dd57
inject stub222b8f27dbdfba8ddd559eeca27ea648
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
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100

116.62.174.16:50050 · Cobalt Strike

listed · certificate 107528da6edc

observed hostmicrosoft.com

116.62.174.16:81 · Cobalt Strike

listed · beacon

Hosts sharing a value with this one

432 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
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, 380 are past the 40 hosts shown.

38.76.219.253JA4X templatelisted
8.163.59.20JA4X templatelisted
117.72.182.5JA4X templatelisted
192.252.185.78JA4X templatelisted
49.232.42.116JA4X templatelisted
156.239.252.191JA4X templatelisted
47.109.23.77JA4X templatelisted
113.250.188.15JA4X templatelisted
47.105.36.109JA4X templatelisted
85.175.101.203JA4X templatelisted
47.251.177.187JA4X templatelisted
101.42.255.92JA4X templatelisted
8.152.212.104JA4X templatelisted
47.95.201.24JA4X templatelisted
154.12.86.154JA4X templatelisted
111.231.116.164JA4X templatelisted
117.72.181.104JA4X templatelisted
60.247.206.23JA4X templatelisted
47.120.32.72JA4X templatelisted
117.72.242.9JA4X templatelisted
43.108.51.124JA4X templatelisted
222.255.215.42JA4X templatelisted
116.198.233.179JA4X templatelisted
82.156.219.31JA4X templatelisted
179.43.186.214JA4X templatelisted
92.222.50.154JA4X templatelisted
85.121.5.211JA4X templatelisted
8.222.166.74JA4X templatelisted
64.177.112.233JA4X templatelisted
64.118.154.116JA4X templatelisted
54.164.24.73JA4X templatelisted
51.159.194.10JA4X templatelisted
47.97.206.32JA4X templatelisted
45.154.12.150JA4X templatelisted
43.138.225.166JA4X templatelisted
43.136.19.18JA4X templatelisted
43.108.84.25JA4X templatelisted
37.60.141.43JA4X templatelisted
38.207.160.73JA4X templatelisted
23.155.44.134JA4X templatelisted
Cobalt Strike watermark · 18 other hosts · 18 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, 18 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.

Every file here was served on :81.

FileConfirmedFile last seen
840cd5cc7e15b3b6ac17cbf9757b2db157c7f074b1fcb00435ac76685509b14eanalysed
a5ae53afba2f32c64dca7ca70691ec1e3b00bb65574acac8144a72915c359430analysed

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 == "116.62.174.16" and RemotePort in (81, 50050))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("840cd5cc7e15b3b6ac17cbf9757b2db157c7f074b1fcb00435ac76685509b14e", "a5ae53afba2f32c64dca7ca70691ec1e3b00bb65574acac8144a72915c359430")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "116.62.174.16" and DestinationPort in (81, 50050))
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="116.62.174.16" (All_Traffic.dest_port=81 OR All_Traffic.dest_port=50050)))
    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="840cd5cc7e15b3b6ac17cbf9757b2db157c7f074b1fcb00435ac76685509b14e" OR Filesystem.file_hash="a5ae53afba2f32c64dca7ca70691ec1e3b00bb65574acac8144a72915c359430")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "116.62.174.16" and destination.port in (81, 50050))
file where file.hash.sha256 in ("840cd5cc7e15b3b6ac17cbf9757b2db157c7f074b1fcb00435ac76685509b14e", "a5ae53afba2f32c64dca7ca70691ec1e3b00bb65574acac8144a72915c359430")

Cite this record

Plain text, for a ticket or a report
Address 116.62.174.16 Family Cobalt Strike (command-and-control server) Ports :81, :50050 Status listed (feed checked 2026-10-30 18:37 UTC) First seen 2026-09-22 Last confirmed 2026-10-30 Record https://publicmosaic.com/ip/116.62.174.16 Source Public Mosaic, TLP:CLEAR