public mosaic llc support@publicmosaic.com
confirmed host

IP address 52.4.177.142

Cobalt Strikecommand-and-control server · :8443

Last confirmed 2026-09-10, first seen 2026-09-02. On AS14618.

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

52.4.177.142:8443 · Cobalt Strike

Last confirmed (5 days ago)

first seen2026-09-02 11:06 UTC
serviceip-port · tcp · alt-HTTPS
observed hoststaff-analytics.us
networkAS14618 · Amazon.com
confidence100 / 100
tls certificate48bf0f3c036d65d7a1627e564ac06c2ef18f20baafc7ded3d34a512fabc25a96
cert subjectstaff-analytics.us
cert issuerYR1
cert issuer orgLet's Encrypt
cert validity2026-08-04 → 2026-11-02
cert typeCA-signed
cert key2048-bit
cert serial (decimal)582275550310009544637880782187227331152131
cert names*.staff-analytics.us staff-analytics.us

The certificate names above were validated by the issuing authority at issuance. They describe the certificate, not conduct by the names' owner — a legitimately issued certificate can be deployed on a listed host by whoever holds its private key, so treat the name as a pivot to investigate rather than as an attribution.

ja4xa373a9f83c6b_7022c563de38_2e3757343cb0
jarm2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da

Observation history

18d agotoday

Observed on 9 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 · 154 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 154. Full cohort →

Pivots & lookups