public mosaic llc support@publicmosaic.com
confirmed host

39.97.57.155

Cobalt Strikecommand-and-control server · :50050, :1223, :1222

Last confirmed 2026-09-15, first seen 2026-09-02. On AS37963. 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 3 ports — :50050, :1223, :1222.

39.97.57.155:50050 · Cobalt Strike

Last confirmed (today)

first seen2026-09-06 10:46 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS37963 · Hangzhou Alibaba Advertising
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

39.97.57.155:1223 · Cobalt Strike

Last confirmed (today)

first seen2026-09-02 10:48 UTC
serviceip-port · tcp
networkAS37963 · Hangzhou Alibaba Advertising
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
cs watermark391144938

Beacon configuration

callbackc-proxy-xjmkjgbsdn.cn-hangzhou.fcapp.run · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTPS
cs versionCobalt Strike 4.7 (Aug 17, 2022)
getGET /jquery-3.3.1.min.js
postPOST /jquery-3.3.2.min.js
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0
sleep20s ±37%
watermark391144938
server key md5062a875bfbe9bdb8a75f02ee99b4efcc
inject stubb50b86d735412685eb6044ad8d01781c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

39.97.57.155:1222 · Cobalt Strike

Last confirmed (today)

first seen2026-09-02 10:48 UTC
serviceip-port · tcp
networkAS37963 · Hangzhou Alibaba Advertising
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
cs watermark391144938

Beacon configuration

callback1328750890-eja72jp2s9.ap-guangzhou.tencentscf.com · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTPS
cs versionCobalt Strike 4.7 (Aug 17, 2022)
getGET /jquery-3.3.1.min.js
postPOST /jquery-3.3.2.min.js
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0
sleep20s ±37%
watermark391144938
server key md5062a875bfbe9bdb8a75f02ee99b4efcc
inject stubb50b86d735412685eb6044ad8d01781c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 14 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 →

1.15.76.39Cobalt Strike103.12.148.37Cobalt Strike106.75.249.202Cobalt Strike107.148.237.76Cobalt Strike111.228.55.96Cobalt Strike113.250.188.15Cobalt Strike121.40.37.49Cobalt Strike122.51.16.188Cobalt Strike124.222.209.39Cobalt Strike124.222.57.34Cobalt Strike134.122.203.247Cobalt Strike139.196.111.118Cobalt Strike150.158.102.111Cobalt Strike175.27.214.144Cobalt Strike180.184.46.116Cobalt Strike180.76.141.175Cobalt Strike20.187.120.42Cobalt Strike210.56.48.227Cobalt Strike42.194.241.92Cobalt Strike43.136.19.18Cobalt Strike43.243.73.187Cobalt Strike47.120.32.72Cobalt Strike47.90.209.157Cobalt Strike47.93.243.161Cobalt Strike

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 →

1.14.104.208Cobalt Strike1.15.76.39Cobalt 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 Strike

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.

101.200.85.0Cobalt Strike106.55.25.253Cobalt Strike106.75.249.202Cobalt Strike117.72.159.96Cobalt Strike119.45.225.53Cobalt Strike124.221.190.127Cobalt Strike154.221.25.38Cobalt Strike167.17.47.252Cobalt Strike180.76.141.175Cobalt Strike192.144.219.65Cobalt Strike207.57.134.202Cobalt Strike209.200.246.194Cobalt Strike210.56.48.227Cobalt Strike39.96.201.230Cobalt Strike42.194.241.92Cobalt Strike43.143.13.146Cobalt Strike47.105.36.109Cobalt Strike47.108.25.113Cobalt Strike47.113.206.140Cobalt Strike47.94.56.71Cobalt Strike47.95.192.147Cobalt Strike47.95.201.24Cobalt Strike59.110.228.141Cobalt Strike60.217.23.146Cobalt Strike

Showing 24 of 28. The rest are reachable from any of them.

Pivots & lookups

same cert → 31 other hosts same ja4x → 270 other hosts same asn → 323 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.