public mosaic llc support@publicmosaic.com
confirmed host

IP address 124.222.28.189

Cobalt Strikecommand-and-control server · :54325, :50050

Last confirmed 2026-09-14, first seen 2026-08-25. On AS45090.

listed last confirmed feed checked TLP:CLEAR SURICATA .RULES SEE THE LIVE FEED →

This address answered on 2 ports — :54325, :50050.

124.222.28.189:54325 · Cobalt Strike

Last confirmed (yesterday)

first seen2026-09-11 13:59 UTC
serviceip-port · tcp
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
cs watermark987654321

Beacon configuration

callback124.222.28.189 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /IE9CompatViewList.xml
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ENUS)
sleep60s ±0%
watermark987654321
server key md58b58691b57794b78721454820cb16b16
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

124.222.28.189:50050 · Cobalt Strike

Last confirmed (yesterday)

first seen2026-08-25 18:03 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
tls certificate260adc9c616bf84d13019a0e3e51ba83464461df35b014ce516cd9789b864a49
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2025-09-25 → 2025-12-24
cert typeself-signed
cert key2048-bit
cert serial (decimal)1171543747

The certificate names above are what the certificate ASSERTS, not proof this host owns them — a self-signed certificate can claim any subject, so treat a familiar name here as an impersonation attempt rather than an identity.

ja4x2166164053c1_2166164053c1_30d204a01551

Observation history

18d agotoday

Observed on 17 of the 18 days since this archive began recording, 2026-08-29 UTC. Presence is per UTC day: a day is marked when the scanner confirmed this address at least once, not once per scan.

Shared JA4X issuance template · 270 hosts

These hosts issued certificates from the same template — the same distinguished-name fields hashed in the same order. It links tooling, not necessarily an operator. Full cohort →

Showing 24 of 270. Full cohort →

Shared Cobalt Strike watermark · 108 hosts

A watermark identifies the Cobalt Strike licence a beacon was generated from. Hosts sharing one were built from the same copy of the software — which is not the same as one operator, since cracked and leaked builds circulate widely and share a watermark by definition.

Showing 24 of 108. The rest are reachable from any of them.

Pivots & lookups