public mosaic llc support@publicmosaic.com
confirmed host

IP address 23.148.212.176

Cobalt Strikecommand-and-control server · :80

Last confirmed 2026-09-06, first seen 2026-09-01. On AS62468.

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

23.148.212.176:80 · Cobalt Strike

Last confirmed (9 days ago)

first seen2026-09-01 18:24 UTC
serviceip-port · tcp
networkAS62468 · VpsQuan
confidence98 / 100
cs watermark666666666

Beacon configuration

callbackdns.n1u89dhs.xyz · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTP
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /load
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.1)
sleep60s ±0%
watermark666666666
server key md59baf081c25d973470dae390081393268
inject stub40ed048138df0b3e23a0ef24dc5efa1a
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 6 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 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.

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

Neighbourhood · 23.148.212.0/24 · 4 hosts

4 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.

Pivots & lookups