Public Mosaic C2 indicators
confirmed host

91.92.47.99

Cobalt Strikecommand-and-control server · :443

On AS197170.

listed last confirmed feed checked TLP:CLEAR Suricata rules Show in the live feed

Relations

Values this address shares with other hosts in this archive, rarest first, watermarks last. A shared value says the hosts were set up alike, not that one operator runs them.

SharedValueOther hosts
JA4X templatea373a9f83c6b_7022c563de38_2e3757343cb0233 other hosts · 218 listed
Cobalt Strike watermark987654321166 other hosts · 166 listed

A Cobalt Strike watermark is a weak link: cracked and leaked builds share one.

Not shared with any other host in this archive: 1 server key, 1 certificate.

Network context

SharedValueOther hosts
/2491.92.47.0/241 other host · 1 listed
NetworkAS197170 · TechTies11 other hosts · 11 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-23
In this archive since2026-09-25
Evidence1 certificate · 1 beacon configuration · 2 files served
Look up elsewhereVirusTotal · Shodan · Censys
About this listingWhat a listing means · Is this your address?

Observation history

Listed on 36 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :443

2026-08-292026-10-30

  • first seen to last confirmed
  • listed after its last confirmation

A marked day is a UTC day the feed listed this address. The feed keeps a listener for up to 90 days after its last confirmation, so a listed day is not a confirmation. A listener no longer in the feed is drawn to its last confirmation.

Listed days as dates
  • 2026-09-25 – 2026-10-30 (36 days)

91.92.47.99:443 · Cobalt Strike

Last confirmed (25 days ago)

first seen2026-09-23 06:10 UTC
serviceip-port · tcp · HTTPS
observed hostmeritphilips.fans
networkAS197170 · TechTies
confidence100 / 100
tls certificatebd032de057fbfc1bce5d5abd7f2aa22aa255aaf2150a5623b52ee696ce9755b4
cert subjectmeritphilips.fans
cert issuerYE2
cert issuer orgLet's Encrypt
cert validity2026-09-21 → 2026-12-20
cert typeissuer-signed
cert key256-bit
cert serial (hex)06ddd7261a5d49358ec5489e547ab430d04e
cert serial (decimal)598162100541196787503044081981342260187214
cert namesmeritphilips.fans

The names above are what the certificate asserts, signed by the issuer it names, which may be a public certificate authority, a private one, or one a builder ships. This site verifies none of it, so treat a name here as a lead to investigate, never an attribution.

ja4xa373a9f83c6b_7022c563de38_2e3757343cb0
jarm28d28d28d00028d00042d42d00042de0d120da90d5910c5de2af43b74a6bd8
cs watermark987654321

Beacon configuration

callbackmeritphilips.fans · same as this host
beacon typeHTTPS
cs versionCobalt Strike 4.9 (Sep 19, 2023)
getGET /cdn/assets/app.min.js
postPOST /api/v1/events
user-agentMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.6613.119 Safari/537.36
sleep45s ±33%
watermark987654321
server key md52fa2cac336b542cab8ca7e71ea5298db
inject stubae5afcfee8026674dc8f3b4f2da46c7f
spawn to x86%windir%\syswow64\WerFault.exe
spawn to x64%windir%\sysnative\WerFault.exe

Hosts sharing a value with this one

398 other hosts in this archive share at least one value with this one. Each is listed once, under its first shared value in Relations order. Dates and status are from the records that share a value. Showing the 40 that rank first.

AddressFamilySharesLast confirmedStatus
JA4X template · 233 other hosts · 218 listed

These hosts’ certificates share one JA4X template, which points to the same certificate tooling. It is not evidence of a single operator.

Of these, 193 are past the 40 hosts shown.

207.56.119.139Flying EagleJA4X templatelisted
186.244.245.148DarkSwordJA4X templatelisted
213.111.176.26AdaptixJA4X templatelisted
38.76.216.85Flying EagleJA4X templatelisted
103.52.152.203Flying EagleJA4X templatelisted
207.56.119.48Flying EagleJA4X templatelisted
85.137.62.225DarkSwordJA4X templatelisted
85.137.62.160DarkSwordJA4X templatelisted
208.87.202.232DarkSwordJA4X templatelisted
202.146.222.253DarkSwordJA4X templatelisted
192.253.229.191DarkSwordJA4X templatelisted
192.162.199.251UnamJA4X templatelisted
181.215.18.87DarkSwordJA4X templatelisted
154.18.187.174DarkSwordJA4X templatelisted
130.94.67.4DarkSwordJA4X templatelisted
131.123.43.22NimPlantJA4X templatelisted
101.33.76.147DarkSwordJA4X templatelisted
20.118.221.53AdaptixJA4X templatelisted
157.137.215.66HavocJA4X templatelisted
152.70.24.49HookJA4X templatelisted
46.19.140.50Cobalt StrikeJA4X template · watermarklisted
45.142.143.152AdaptixJA4X templatelisted
45.142.142.252AdaptixJA4X templatelisted
89.34.227.72AdaptixJA4X templatelisted
69.8.133.42AdaptixJA4X templatelisted
149.104.71.157AdaptixJA4X templatelisted
216.167.81.141OverlordJA4X templatelisted
69.8.133.228AdaptixJA4X templatelisted
52.196.120.218Flying EagleJA4X templatelisted
116.213.43.162Diaoyu KejiJA4X templatelisted
179.43.175.26BTMOBJA4X templatelisted
194.100.215.101PyramidJA4X templatelisted
69.8.133.232AdaptixJA4X templatelisted
161.35.239.147HavocJA4X templatelisted
179.43.175.47OverlordJA4X templatelisted
43.98.165.114DarkSwordJA4X templatelisted
64.90.30.189Flying EagleJA4X templatelisted
108.187.43.82Flying EagleJA4X templatelisted
192.229.116.34Flying EagleJA4X templatelisted
45.194.36.5Flying EagleJA4X templatelisted
Cobalt Strike watermark · 166 other hosts · 166 listed

The watermark identifies the Cobalt Strike licence a beacon was built with. Cracked and leaked builds share watermarks widely, so it is not evidence of a single operator.

Of these, 1 is listed under an earlier value and 165 are past the 40 hosts shown.

Samples served · 2 files

Files this address was seen serving, each identified by running or analysing it. A widely distributed file can reach unrelated hosts.

Every file here was served on :443.

FileConfirmedFile last seen
48c92841176cb55deb8370e7b26cc9d2b062c86c9d3f0d37558bc791d6c3d9f1analysed
fda5b2b2e960ef8cc850a036f51b18b25e5a6aabe65d6ce05df76760df104cdbanalysed

Neighbourhood · 91.92.47.0/24 · 1 other host

1 other host in this archive is in the same /24, shown for context.

91.92.47.160Sliver

Deploy

Suricata rules and hunt queries for this address’s 1 listed listener.

Suricata rules

Each query searches the last 30 days of your logs for connections to these listeners and for the 2 files this address served. Queries hold only addresses, ports and file hashes.

Microsoft Defender XDR (KQL)
DeviceNetworkEvents
| where Timestamp > ago(30d)
| where (RemoteIP == "91.92.47.99" and RemotePort in (443))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("48c92841176cb55deb8370e7b26cc9d2b062c86c9d3f0d37558bc791d6c3d9f1", "fda5b2b2e960ef8cc850a036f51b18b25e5a6aabe65d6ce05df76760df104cdb")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "91.92.47.99" and DestinationPort in (443))
Splunk (SPL, CIM data models)
| tstats summariesonly=false count min(_time) as first_time max(_time) as last_time
    from datamodel=Network_Traffic where earliest=-30d
    ((All_Traffic.dest_ip="91.92.47.99" (All_Traffic.dest_port=443)))
    by All_Traffic.src_ip All_Traffic.dest_ip All_Traffic.dest_port
| tstats summariesonly=false count min(_time) as first_time max(_time) as last_time
    from datamodel=Endpoint.Filesystem where earliest=-30d
    (Filesystem.file_hash="48c92841176cb55deb8370e7b26cc9d2b062c86c9d3f0d37558bc791d6c3d9f1" OR Filesystem.file_hash="fda5b2b2e960ef8cc850a036f51b18b25e5a6aabe65d6ce05df76760df104cdb")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "91.92.47.99" and destination.port in (443))
file where file.hash.sha256 in ("48c92841176cb55deb8370e7b26cc9d2b062c86c9d3f0d37558bc791d6c3d9f1", "fda5b2b2e960ef8cc850a036f51b18b25e5a6aabe65d6ce05df76760df104cdb")

Cite this record

Plain text, for a ticket or a report
Address 91.92.47.99 Family Cobalt Strike (command-and-control server) Ports :443 Status listed (feed checked 2026-10-30 18:37 UTC) First seen 2026-09-23 Last confirmed 2026-10-05 Record https://publicmosaic.com/ip/91.92.47.99 Source Public Mosaic, TLP:CLEAR