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confirmed host

101.37.236.20

Cobalt Strikecommand-and-control server · :443, :80

Last confirmed 2026-09-09, first seen 2026-09-09. On AS37963.

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

This address answered on 2 ports — :443, :80.

101.37.236.20:443 · Cobalt Strike

Last confirmed (6 days ago)

first seen2026-09-09 00:08 UTC
serviceip-port · tcp · HTTPS blend-in
observed hostdnslogger.site
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
tls certificate45719a2cd37335abc7f24c3831b693bc777df333d44b893ef684dd09dbe204f8
cert subjectdnslogger.site
cert issuerEncryption Everywhere DV TLS CA - G2
cert issuer orgDigiCert Inc
cert validity2025-12-16 → 2026-12-15
cert typeCA-signed
cert key2048-bit
cert serial (decimal)8214598835026453392645130234803436535
cert namesdnslogger.site www.dnslogger.site

The certificate names above were validated by the issuing authority at issuance. They describe the certificate, not conduct by the names' owner — a legitimately issued certificate can be deployed on a listed host by whoever holds its private key, so treat the name as a pivot to investigate rather than as an attribution.

ja4x7d5dbb3783b4_7022c563de38_f64f03ad387e
jarm2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da
cs watermark666666666

Beacon configuration

callbacktest.dnslogger.site · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTPS
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /jquery-3.3.1.min.js
postPOST /jquery-3.3.2.min.js
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Viewer/99.9.8782.87
sleep18s ±26%
watermark666666666
server key md55255826553383e05b74e4ce2fb62eaef
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\gpupdate.exe
spawn to x64%windir%\sysnative\gpupdate.exe

101.37.236.20:80 · Cobalt Strike

Last confirmed (6 days ago)

first seen2026-09-09 00:08 UTC
serviceip-port · tcp
networkAS37963 · Hangzhou Alibaba Advertising
confidence100 / 100
cs watermark666666666

Beacon configuration

callbacktest.dnslogger.site · operator-supplied; a redirector or impersonation target, not an attribution
beacon typeHTTP
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /jquery-3.3.1.min.js
postPOST /jquery-3.3.2.min.js
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Viewer/99.9.8782.87
sleep18s ±26%
watermark666666666
server key md55255826553383e05b74e4ce2fb62eaef
inject stube781a4479f7c5a03b2dcfe4bd436366f
spawn to x86%windir%\syswow64\gpupdate.exe
spawn to x64%windir%\sysnative\gpupdate.exe

Observation history

18d agotoday

Observed on 1 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.

1.92.135.168Cobalt Strike101.126.10.34Cobalt Strike101.201.109.2Cobalt Strike101.42.255.92Cobalt Strike103.204.174.212Cobalt Strike103.212.186.85Cobalt Strike103.236.84.103Cobalt Strike103.6.169.62Cobalt Strike107.172.217.220Cobalt Strike111.228.5.127Cobalt Strike113.250.188.15Cobalt Strike114.215.188.153Cobalt Strike114.66.27.110Cobalt Strike116.205.106.137Cobalt Strike117.72.125.206Cobalt Strike117.72.182.5Cobalt Strike120.76.143.184Cobalt Strike123.207.214.140Cobalt Strike124.222.161.70Cobalt Strike124.222.210.55Cobalt Strike137.220.194.15Cobalt Strike139.196.111.118Cobalt Strike149.30.232.29Cobalt Strike150.158.102.111Cobalt Strike

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

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.