public mosaic llc support@publicmosaic.com
confirmed host

IP address 45.221.118.46

Cobalt Strikecommand-and-control server · :8443, :8080

Last confirmed 2026-09-02, first seen 2026-08-23. On AS55933.

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

This address answered on 2 ports — :8443, :8080.

45.221.118.46:8443 · Cobalt Strike

Last confirmed (13 days ago)

first seen2026-08-23 00:17 UTC
serviceip-port · tcp · alt-HTTPS
observed hostforen.zik
networkAS55933 · Cloudie
confidence100 / 100
tls certificateafc341b7408f295bf0ba93d4c700a9674894d92202cbec30192244542f54ce7d
cert subjectforen.zik
cert subject orgNN Fern Sub
cert issuerforen.zik
cert issuer orgNN Fern Sub
cert validity2026-08-23 → 2027-08-23
cert typeself-signed
cert key2048-bit

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
jarm2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da
cs watermark987654321

Beacon configuration

callbackcdn.pixelcss.org · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTPS
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /www/handle/doc
postPOST /IMXo
user-agentMozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
sleep3s ±7%
watermark987654321
server key md5fd178ddd43ee4181e364bdd46ddc53f2
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
spawn to x64C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\csc.exe

45.221.118.46:8080 · Cobalt Strike

Last confirmed (23 days ago)

first seen2026-08-23 00:17 UTC
serviceip-port · tcp · alt-HTTP
observed hostforen.zik
networkAS55933 · Cloudie
confidence100 / 100
tls certificateccce2223024b1326fc5b417f223a9fabc2bd5039a45b7f53e2ed5ae2186687fd
cert subjectforen.zik
cert subject orgNN Fern Sub
cert issuerforen.zik
cert issuer orgNN Fern Sub
cert validity2026-08-23 → 2027-08-23
cert typeself-signed
cert key2048-bit

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
jarm2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da

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 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.

Neighbourhood · 45.221.118.0/24 · 3 hosts

3 other confirmed hosts in the same /24. Adjacent addresses under one operator are a different signal from a shared certificate — they suggest a block, not a build.

Pivots & lookups