public mosaic llc support@publicmosaic.com
confirmed host

IP address 198.199.72.177

Cobalt Strikecommand-and-control server · :9900, :7771

Last confirmed 2026-09-15, first seen 2026-08-23. On AS14061.

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

This address answered on 2 ports — :9900, :7771.

198.199.72.177:9900 · Cobalt Strike

Last confirmed (today)

first seen2026-08-27 19:20 UTC
serviceip-port · tcp
observed hostfrance.net
networkAS14061 · DigitalOcean
confidence100 / 100
tls certificateea78db19c584fef1610bd5da7007da6487118d4e196d5eef62673c42b13a2f9e
cert subjectfrance.net
cert subject orgv2.52
cert issuerfrance.net
cert issuer orgv2.52
cert validity2026-07-16 → 2027-07-16
cert typeself-signed
cert key2048-bit
cert serial (decimal)10972200405935913234

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

198.199.72.177:7771 · Cobalt Strike

Last confirmed (today)

first seen2026-08-23 03:23 UTC
serviceip-port · tcp
networkAS14061 · DigitalOcean
confidence100 / 100
tls certificatee10fb7c4f468cdcb4de1e00e4ff150f151c3a7bfea6c62109dd2c84816f990b2
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2026-07-06 → 2026-10-04
cert typeself-signed
cert key2048-bit
cert serial (decimal)1879598242116371521

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 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