public mosaic llc support@publicmosaic.com
confirmed host

207.57.123.57

Cobalt Strikecommand-and-control server · :2083

Last confirmed 2026-09-01, first seen 2026-08-26. On AS2914.

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

207.57.123.57:2083 · Cobalt Strike

Last confirmed (13 days ago)

first seen2026-08-26 01:06 UTC
serviceip-port · tcp
observed hostblogger.yb6698.com
networkAS2914 · NTT America
confidence100 / 100
tls certificateeb6879fd27a20e3b33b88666ff8d527a7f37ab1b542a9cefb198bd464c77ec0d
cert subjectCloudFlare Origin Certificate
cert subject orgCloudFlare, Inc.
cert issuer orgCloudFlare, Inc.
cert validity2026-07-16 → 2028-07-15
cert typeCA-signed
cert key256-bit
cert serial (decimal)530763027972899593547110003635519812712401226413
cert namesblogger.yb6698.com

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.

ja4x7edd3f07c80b_9fb583da09a2_fb02ba79e164
jarm28d28d28d00028d00042d42d00042de0d120da90d5910c5de2af43b74a6bd8
cs watermark666666666

Beacon configuration

callbackblogger.yb6698.com · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /api/3
postPOST /api/4
user-agentMozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)
sleep60s ±0%
watermark666666666
server key md5ca1c5ee4c6f4451759972387cacad5ac
inject stub40ed048138df0b3e23a0ef24dc5efa1a
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 4 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 · 1 host

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 →

154.12.94.16Cobalt Strike

Shared Cobalt Strike watermark · 56 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.

1.92.135.168Cobalt Strike101.126.10.34Cobalt Strike101.201.109.2Cobalt Strike101.37.236.20Cobalt Strike101.42.255.92Cobalt Strike103.204.174.212Cobalt Strike103.212.186.85Cobalt Strike103.236.84.103Cobalt Strike103.6.169.62Cobalt Strike107.172.217.220Cobalt Strike111.228.5.127Cobalt Strike113.250.188.15Cobalt Strike114.215.188.153Cobalt Strike114.66.27.110Cobalt Strike116.205.106.137Cobalt Strike117.72.125.206Cobalt Strike117.72.182.5Cobalt Strike120.76.143.184Cobalt Strike123.207.214.140Cobalt Strike124.222.161.70Cobalt Strike124.222.210.55Cobalt Strike137.220.194.15Cobalt Strike139.196.111.118Cobalt Strike149.30.232.29Cobalt Strike

Showing 24 of 56. The rest are reachable from any of them.

Neighbourhood · 207.57.123.0/24 · 2 hosts

2 other confirmed hosts in the same /24. Adjacent addresses under one operator are a different signal from a shared certificate — they suggest a block, not a build.

207.57.123.129Adaptix207.57.123.251reverse-ssh

Pivots & lookups

same ja4x → 1 other host same asn → 5 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.