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confirmed host

192.255.139.206

Cobalt Strikecommand-and-control server · :443

Last confirmed 2026-09-04, first seen 2026-08-29. On AS54290.

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

192.255.139.206:443 · Cobalt Strike

Last confirmed (10 days ago)

first seen2026-08-29 06:42 UTC
serviceip-port · tcp · HTTPS blend-in
observed hostwww.google.com
networkAS54290 · Hostwinds
confidence100 / 100
tls certificate20cb37518a2fed26d1d9adf0109fb68b199436cb41347d1186ad49159c6c217b
cert subjectwww.google.com
cert subject orgGoogle
cert issuerwww.google.com
cert issuer orgGoogle
cert validity2026-08-18 → 2027-08-18
cert typeself-signed
cert key2048-bit
cert serial (decimal)255527072490204828517254128936220418255395697056

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.

ja4x2bab15409345_2bab15409345_795797892f9c
jarm2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da
cs watermark987654321

Beacon configuration

callbackokj2o.ccwu.cc · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTPS
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /jquery-3.3.1.min.js
postPOST /api/v1/update
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36
sleep10s ±20%
watermark987654321
server key md5180fa019d93d0c46913142197391fbcc
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 7 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 · 20 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 →

1.14.234.68Adaptix101.36.123.12Adaptix104.207.93.167Adaptix106.53.107.131Adaptix119.45.93.117Adaptix144.172.118.114Adaptix152.42.174.192Adaptix164.90.205.13Adaptix193.32.162.108Adaptix194.182.87.116Adaptix207.56.26.118Adaptix217.154.212.25Cobalt Strike43.135.34.69Adaptix43.143.57.45Adaptix43.156.61.27Adaptix45.150.38.95Adaptix89.124.108.211Adaptixarchived91.92.241.184Adaptix91.92.241.187Adaptix91.92.243.115Adaptix

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.

1.15.76.39Cobalt Strike1.94.65.9Cobalt 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 Strike

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

Pivots & lookups

same ja4x → 20 other hosts same asn → 10 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.