public mosaic llc support@publicmosaic.com
confirmed host

IP address 59.110.153.133

Cobalt Strikecommand-and-control server · :4444, :8080

Last confirmed 2026-09-13, first seen 2026-09-08. On AS37963.

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

This address answered on 2 ports — :4444, :8080.

59.110.153.133:4444 · Cobalt Strike

Last confirmed (2 days ago)

first seen2026-09-11 17:51 UTC
serviceip-port · tcp · Metasploit default
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
tls certificated225e5e4d53b26f7de8062184dc82ef63663669ad50ee28a075294eafc9d7b6e
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2026-09-07 → 2026-12-06
cert typeself-signed
cert key2048-bit
cert serial (decimal)660005789

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

59.110.153.133:8080 · Cobalt Strike

Last confirmed (2 days ago)

first seen2026-09-08 23:25 UTC
serviceip-port · tcp · alt-HTTP
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
cs watermark987654321

Beacon configuration

callback59.110.153.133 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /activity
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; Xbox)
sleep60s ±0%
watermark987654321
server key md53d9761eda40c664f9792dcfb81a415a4
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 6 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