public mosaic llc support@publicmosaic.com
confirmed host

IP address 111.228.55.96

Cobalt Strikecommand-and-control server · :443, :50050

Last confirmed 2026-09-02, first seen 2026-08-23. On AS141679. Its certificate is shared with 124 other confirmed hosts.

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

This address answered on 2 ports — :443, :50050.

111.228.55.96:443 · Cobalt Strike

Last confirmed (13 days ago)

first seen2026-08-26 18:06 UTC
serviceip-port · tcp · HTTPS blend-in
networkAS141679 · China Telecom Beijing Tianjin Hebei B…
confidence100 / 100
tls certificate87f2085c32b6a2cc709b365f55873e207a9caa10bffecf2fd16d3cf9d94d390c
cert validity2015-05-20 → 2025-05-17
cert typeself-signed
cert key2048-bit
cert serial (decimal)146473198

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

Beacon configuration

callback111.228.55.96 · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.7 (Aug 17, 2022)
getGET /dpixel
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; NP07; NP07)
sleep60s ±0%
watermark391144938
server key md5b307960675ebff620b813ccb015e3995
inject stubb50b86d735412685eb6044ad8d01781c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

111.228.55.96:50050 · Cobalt Strike

Last confirmed (13 days ago)

first seen2026-08-23 03:23 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS141679 · China Telecom Beijing Tianjin Hebei B…
confidence100 / 100
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 (decimal)659754494

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 5 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 TLS certificates · 124 hosts

This address served 2 distinct certificates. The hosts below share at least one of them — the set is a union, not a single cluster.

Showing 24 of 124. The rest are reachable from any of them.

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 →

Pivots & lookups