public mosaic llc support@publicmosaic.com
confirmed host

IP address 156.254.20.46

Cobalt Strikecommand-and-control server · :5998, :5996

Last confirmed 2026-09-15, first seen 2026-09-14. On AS153706.

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

This address answered on 2 ports — :5998, :5996.

156.254.20.46:5998 · Cobalt Strike

Last confirmed (today)

first seen2026-09-14 21:11 UTC
serviceip-port · tcp
networkAS153706 · Stack Network Sdn. Bhd
confidence98 / 100
cs watermark666666666

Beacon configuration

callback156.254.20.46 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /g.pixel
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; UHS)
sleep60s ±0%
watermark666666666
server key md5fed26edc75be700350ef67015ba3ed35
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

156.254.20.46:5996 · Cobalt Strike

Last confirmed (today)

first seen2026-09-14 21:11 UTC
serviceip-port · tcp
networkAS153706 · Stack Network Sdn. Bhd
confidence98 / 100
cs watermark666666666

Beacon configuration

callback156.254.20.46 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /cm
postPOST /submit.php
user-agentMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET4.0C; .NET4.0E)
sleep60s ±0%
watermark666666666
server key md5fed26edc75be700350ef67015ba3ed35
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 2 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.

Pivots & lookups

lookups: virustotal · shodan · censys