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confirmed host

39.102.58.148

Cobalt Strikecommand-and-control server · :50050, :55566

Last confirmed 2026-09-15, first seen 2026-09-02. On AS37963.

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

This address answered on 2 ports — :50050, :55566.

39.102.58.148:50050 · Cobalt Strike

Last confirmed (today)

first seen2026-09-05 22:24 UTC
serviceip-port · tcp · Cobalt Strike team server default
observed hostmicrosoft.com
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
tls certificate2d62582ac0164c4968a54a859c849cf574e3b065be0e95e3a7579f02b24eef61
cert subject*.microsoft.com
cert subject orgMicrosoft Corporation
cert issuer*.microsoft.com
cert issuer orgMicrosoft Corporation
cert validity2022-06-12 → 2022-09-10
cert typeself-signed
cert key2048-bit
cert serial (decimal)1363468472

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
jarm07d14d16d21d21d00042d41d00041d47e4e0ae17960b2a5b4fd6107fbb0926

39.102.58.148:55566 · Cobalt Strike

Last confirmed (today)

first seen2026-09-02 10:50 UTC
serviceip-port · tcp
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
cs watermark100000

Beacon configuration

callback39.102.58.148 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.5 (Dec 14, 2021)
getGET /cm
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)
sleep60s ±0%
watermark100000
server key md5c3c03f43ab189edddc37a7b5848ade40
inject stub04e0a11be59147a8d73d2b3e9fea832c
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 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 · 8 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.

111.228.49.20Cobalt Strike111.229.4.108Cobalt Strike156.239.252.191Cobalt Strike43.155.9.112Cobalt Strike47.83.3.103Cobalt Strike47.86.184.71Cobalt Strike65.49.233.218Cobalt Strike8.148.26.139Cobalt Strike

Pivots & lookups

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.