public mosaic llc support@publicmosaic.com
confirmed host

101.43.53.103

Cobalt Strikecommand-and-control server · :6777, :9403, :8081

Last confirmed 2026-09-15, first seen 2026-08-28. On AS45090.

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

This address answered on 3 ports — :6777, :9403, :8081.

101.43.53.103:6777 · Cobalt Strike

Last confirmed (today)

first seen2026-09-06 10:44 UTC
serviceip-port · tcp
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
cs watermark666666

Beacon configuration

callback101.43.53.103 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.5 (Dec 14, 2021)
getGET /ca
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; BOIE9;ENUSMSE)
sleep60s ±0%
watermark666666
server key md5043365d7dfb89f71ce8fd7ff70d6f51d
inject stub04e0a11be59147a8d73d2b3e9fea832c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

101.43.53.103:9403 · Cobalt Strike

Last confirmed (today)

first seen2026-09-05 21:27 UTC
serviceip-port · tcp
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
cs watermark666666

Beacon configuration

callback101.43.53.103 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.5 (Dec 14, 2021)
getGET /ca
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; BOIE9;ENUSMSE)
sleep60s ±0%
watermark666666
server key md5043365d7dfb89f71ce8fd7ff70d6f51d
inject stub04e0a11be59147a8d73d2b3e9fea832c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

101.43.53.103:8081 · Cobalt Strike

Last confirmed (today)

first seen2026-08-28 20:23 UTC
serviceip-port · tcp
networkAS45090 · Shenzhen Tencent Computer Systems Com…
confidence100 / 100
cs watermark666666

Beacon configuration

callback101.43.53.103 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.5 (Dec 14, 2021)
getGET /visit.js
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; ; NCLIENT50_AAPCDA5841E333)
sleep60s ±0%
watermark666666
server key md5043365d7dfb89f71ce8fd7ff70d6f51d
inject stub04e0a11be59147a8d73d2b3e9fea832c
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 18 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 · 2 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.

117.72.181.104Cobalt Strike137.220.151.95Cobalt Strike

Pivots & lookups

same asn → 358 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.