public mosaic llc support@publicmosaic.com
confirmed host

8.148.26.139

Cobalt Strikecommand-and-control server · :9999

Last confirmed 2026-09-05, first seen 2026-08-31. On AS37963.

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

8.148.26.139:9999 · Cobalt Strike

Last confirmed (9 days ago)

first seen2026-08-31 19:58 UTC
serviceip-port · tcp
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
cs watermark100000

Beacon configuration

callback172.16.94.76 · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTP
cs versionCobalt Strike 4.5 (Dec 14, 2021)
getGET /cx
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; ; NCLIENT50_AAPCDA5841E333)
sleep60s ±0%
watermark100000
server key md5299fb998b5363fce916aed707984adfc
inject stub04e0a11be59147a8d73d2b3e9fea832c
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 · 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 Strike39.102.58.148Cobalt Strike43.155.9.112Cobalt Strike47.83.3.103Cobalt Strike47.86.184.71Cobalt Strike65.49.233.218Cobalt Strike

Pivots & lookups

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.