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confirmed host

165.99.43.101

Cobalt Strikecommand-and-control server · :50050, :4445

Last confirmed 2026-09-15, first seen 2026-09-04. On AS401701.

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

This address answered on 2 ports — :50050, :4445.

165.99.43.101:50050 · Cobalt Strike

Last confirmed (today)

first seen2026-09-08 13:17 UTC
serviceip-port · tcp · Cobalt Strike team server default
networkAS401701 · cognetcloud
confidence100 / 100
tls certificateb95be8dc7cb1889ef7961f80f18e9e790d077aac0791cc0860ca0d4e17e3b71b
cert subjectMajor Cobalt Strike
cert subject orgcobaltstrike
cert issuerMajor Cobalt Strike
cert issuer orgcobaltstrike
cert validity2026-08-31 → 2026-11-29
cert typeself-signed
cert key2048-bit
cert serial (decimal)17361704083040080364

The certificate names above are what the certificate ASSERTS, not proof this host owns them — a self-signed certificate can claim any subject, so treat a familiar name here as an impersonation attempt rather than an identity.

ja4x2166164053c1_2166164053c1_30d204a01551

165.99.43.101:4445 · Cobalt Strike

Last confirmed (today)

first seen2026-09-04 06:58 UTC
serviceip-port · tcp
networkAS401701 · cognetcloud
confidence100 / 100
cs watermark987654321

Beacon configuration

callback165.99.43.101 · same as this host
beacon typeHTTP
cs versionCobalt Strike 4.8 (Feb 28, 2023)
getGET /cm
postPOST /submit.php
user-agentMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; UHS)
sleep60s ±0%
watermark987654321
server key md5b22bc3817f2791e7b9912ab69cc59324
inject stube43a1b63f09794f74d90a9889f7acb77
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Observation history

18d agotoday

Observed on 12 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 · 270 hosts

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 →

1.14.104.208Cobalt Strike1.15.76.39Cobalt Strike101.126.10.34Cobalt Strike101.200.193.211Cobalt Strike101.200.29.195Cobalt Strike101.200.85.0Cobalt Strike101.201.103.158Cobalt Strike101.201.109.2Cobalt Strike101.33.200.145Cobalt Strike101.33.225.32Cobalt Strike101.35.238.122Cobalt Strike101.42.136.73Cobalt Strike101.42.255.92Cobalt Strike101.43.103.154Cobalt Strike102.203.116.201Cobalt Strike103.119.47.222Cobalt Strike103.12.148.37Cobalt Strike103.204.174.212Cobalt Strike103.212.186.85Cobalt Strike103.27.111.130Cobalt Strike103.6.169.62Cobalt Strike104.168.102.116Cobalt Strike106.15.10.2Cobalt Strike106.53.61.9Cobalt Strike

Showing 24 of 270. Full cohort →

Shared Cobalt Strike watermark · 108 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.

1.15.76.39Cobalt Strike1.94.65.9Cobalt Strike101.200.193.211Cobalt Strike101.201.103.158Cobalt Strike101.42.136.73Cobalt Strike103.119.47.222Cobalt Strike103.217.186.180Cobalt Strike104.168.102.116Cobalt Strike106.15.10.2Cobalt Strike111.228.4.54Cobalt Strike111.231.116.164Cobalt Strike115.159.226.190Cobalt Strike115.190.161.178Cobalt Strike115.190.250.28Cobalt Strike116.198.233.179Cobalt Strike117.50.184.221Cobalt Strike117.72.242.9Cobalt Strike118.24.172.48Cobalt Strike118.89.79.131Cobalt Strike118.89.88.183Cobalt Strike119.45.160.160Cobalt Strike120.55.3.157Cobalt Strike120.55.93.58Cobalt Strike120.77.254.122Cobalt Strike

Showing 24 of 108. The rest are reachable from any of them.

Pivots & lookups

same ja4x → 270 other hosts same asn → 48 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.