public mosaic llc support@publicmosaic.com
confirmed host

IP address 42.194.241.92

Cobalt Strikecommand-and-control server · :8181, :50050

Last confirmed 2026-09-15, first seen 2026-08-23. On AS45090. Its certificate is shared with 31 other confirmed hosts.

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

This address answered on 2 ports — :8181, :50050.

42.194.241.92:8181 · Cobalt Strike

Last confirmed (today)

first seen2026-09-04 06:58 UTC
serviceip-port · tcp
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
cs watermark391144938

Beacon configuration

callback42.194.241.92 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.7 (Aug 17, 2022)
getGET /__utm.gif
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)
sleep60s ±0%
watermark391144938
server key md53bdee16a14fe6718c71ca8ca65ccb2bc
inject stubb50b86d735412685eb6044ad8d01781c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

42.194.241.92:50050 · Cobalt Strike

Last confirmed (today)

first seen2026-08-23 03:23 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS45090 · Shenzhen Tencent Computer Systems Com…
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 18 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 certificate · 31 hosts

These hosts served the same certificate. That is the strongest link this corpus can draw between two addresses, though it evidences a shared BUILD rather than a shared operator: a leaked or resold profile puts the same certificate in different hands. Full cohort →

Showing 24 of 31. Full cohort →

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 · 28 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 28. The rest are reachable from any of them.

Pivots & lookups