public mosaic llc support@publicmosaic.com
confirmed host

IP address 223.109.142.7

Cobalt Strikecommand-and-control server · :50050, :8443, :443

Last confirmed 2026-09-15, first seen 2026-09-04. On AS56046. Its certificate is shared with 99 other confirmed hosts.

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

This address answered on 3 ports — :50050, :8443, :443.

223.109.142.7:50050 · Cobalt Strike

Last confirmed (today)

first seen2026-09-05 21:28 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS56046 · China Mobile communications
confidence100 / 100
tls certificate5a7cb28d2440574f478fe556b9995df48e369c70b27e2a5f5ab92bfa3b8652a7
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2026-09-02 → 2026-12-01
cert typeself-signed
cert key2048-bit
cert serial (decimal)590176634

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

223.109.142.7:8443 · Cobalt Strike

Last confirmed (4 days ago)

first seen2026-09-04 18:12 UTC
serviceip-port · tcp · alt-HTTPS
networkAS56046 · China Mobile communications
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
cs watermark987654321

Beacon configuration

callback223.109.142.7 · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /updates.rss
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ENCA)
sleep60s ±0%
watermark987654321
server key md54804f6a574785c87216152e615fb39dc
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

223.109.142.7:443 · Cobalt Strike

Last confirmed (today)

first seen2026-09-04 18:12 UTC
serviceip-port · tcp · HTTPS blend-in
networkAS56046 · China Mobile communications
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
cs watermark987654321

Beacon configuration

callback223.109.142.7 · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /updates.rss
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ENCA)
sleep60s ±0%
watermark987654321
server key md54804f6a574785c87216152e615fb39dc
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 12 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 · 99 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 99. 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 →

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