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confirmed host

1.15.76.39

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

Last confirmed 2026-09-15, first seen 2026-08-23. On AS45090. Its certificate is shared with 124 other confirmed hosts.

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

This address answered on 2 ports — :8443, :50050.

1.15.76.39:8443 · Cobalt Strike

Last confirmed (today)

first seen2026-08-23 06:18 UTC
serviceip-port · tcp · alt-HTTPS
networkAS45090 · Shenzhen Tencent Computer Systems Com…
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

callback1.15.76.39 · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /dpixel
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.1)
sleep60s ±0%
watermark987654321
server key md55055e667f7ef1d89f2ecc2448badb569
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

1.15.76.39:50050 · 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
cohortshared issuance template · 32 hosts

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 certificates · 124 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.

101.126.10.34Cobalt Strike101.201.103.158Cobalt Strike101.33.200.145Cobalt Strike101.42.136.73Cobalt Strike101.42.255.92Cobalt Strike103.119.47.222Cobalt Strike103.12.148.37Cobalt Strike103.212.186.85Cobalt Strike103.6.169.62Cobalt Strike104.168.102.116Cobalt Strike106.53.61.9Cobalt Strike106.54.21.74Cobalt Strike106.55.25.253Cobalt Strike106.55.46.152Cobalt Strike106.55.47.62Cobalt Strike106.75.249.202Cobalt Strike107.148.237.76Cobalt Strike111.228.5.127Cobalt Strike111.228.55.96Cobalt Strike111.231.116.164Cobalt Strike113.250.188.15Cobalt Strike113.45.253.80Cobalt Strike114.132.216.210Cobalt Strike114.132.46.254Cobalt Strike

Showing 24 of 124. 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 →

1.14.104.208Cobalt Strike101.126.10.34Cobalt Strike101.200.193.211Cobalt Strike101.200.29.195Cobalt Strike101.200.85.0Cobalt Strike101.201.103.158Cobalt Strike101.201.109.2Cobalt Strike101.33.200.145Cobalt Strike101.33.225.32Cobalt Strike101.35.238.122Cobalt Strike101.42.136.73Cobalt Strike101.42.255.92Cobalt Strike101.43.103.154Cobalt Strike102.203.116.201Cobalt Strike103.119.47.222Cobalt Strike103.12.148.37Cobalt Strike103.204.174.212Cobalt Strike103.212.186.85Cobalt Strike103.27.111.130Cobalt Strike103.6.169.62Cobalt Strike104.168.102.116Cobalt Strike106.15.10.2Cobalt Strike106.53.61.9Cobalt Strike106.54.21.74Cobalt Strike

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.

1.94.65.9Cobalt Strike101.200.193.211Cobalt Strike101.201.103.158Cobalt Strike101.42.136.73Cobalt Strike103.119.47.222Cobalt Strike103.217.186.180Cobalt Strike104.168.102.116Cobalt Strike106.15.10.2Cobalt Strike111.228.4.54Cobalt Strike111.231.116.164Cobalt Strike115.159.226.190Cobalt Strike115.190.161.178Cobalt Strike115.190.250.28Cobalt Strike116.198.233.179Cobalt Strike117.50.184.221Cobalt Strike117.72.242.9Cobalt Strike118.24.172.48Cobalt Strike118.89.79.131Cobalt Strike118.89.88.183Cobalt Strike119.45.160.160Cobalt Strike120.55.3.157Cobalt Strike120.55.93.58Cobalt Strike120.77.254.122Cobalt Strike124.220.34.180Cobalt Strike

Showing 24 of 108. The rest are reachable from any of them.

Pivots & lookups

same ja4x → 270 other hosts same asn → 358 other hosts lookups: virustotal · shodan · censys

Listed in error?

This page is generated from automated scanning and is publicly available. If you are responsible for this address and it should not be listed, write to support@publicmosaic.com — see abuse & takedown for what we need and what happens next, or opt-out to exclude a whole range from scanning.

Addresses are frequently compromised third-party hosts rather than infrastructure their owner stood up. A listing records what a scan observed at a point in time; it is not an allegation about whoever pays for the address.