confirmed host

IP address 187.52.119.59

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

On AS47583.

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
Cobalt Strike watermark10000013 other hosts · 13 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.

Network context

SharedValueOther hosts
NetworkAS47583 · Hostinger International5 other hosts · 4 listed

Hosts near this one, for context only.

Summary

First seen by the scanner2026-09-20
Ports2 · 2 listed
Evidence2 beacon configurations · 2 files served
Look up elsewhereVirusTotal · Shodan · Censys

Ports

This address answered on 2 ports. First seen and last confirmed dates are per row, by UTC day.

PortFirst seenLast confirmedStatusConfiguration
:443 · HTTPSlistedbeacon 1
:80listedbeacon 2

Observation history

Listed on 41 of the 63 days since this archive began recording, 2026-08-29 UTC.

  1. listed
  2. :443 and 1 more

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
  • 2026-09-20 – 2026-10-30 (41 days)

Evidence

Each certificate, configuration and file appears once, with the listeners that carried it.

Beacon configurations

2 configurations on 2 listeners. Common to both:

beacon typeHTTP
cs versionUnknown
getGET /updates
postPOST /submit
sleep0s ±0%
watermark100000
server key md556e53e323981e9fa5a5402a1c120fdab
inject stub5c07b28a75b7e746702c369f33be8c3f
spawn to x86%windir%\syswow64\rundll32.exe
spawn to x64%windir%\sysnative\rundll32.exe

Each configuration calls back on its own listener’s port. Where they differ:

Configurationcallbackuser-agent
Beacon 1 · :443handlerforword.asuscomm.com · set in the beacon by its builder; may be a redirector or a borrowed nameMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)
Beacon 2 · :80187.52.119.59 · same as this hostMozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0; MASP)

Listeners

Each listener below shows its status and what sets it apart. Dates are in Ports; certificates, configurations and files in Evidence. Common to both listeners:

serviceip-port · tcp
networkAS47583 · Hostinger International
confidence98 / 100

187.52.119.59:443 · Cobalt Strike

listed · beacon 1

187.52.119.59:80 · Cobalt Strike

listed · beacon 2

Hosts sharing a value with this one

13 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. Every host shown is labelled Cobalt Strike, as this one is.

AddressSharesLast confirmedStatus
Cobalt Strike watermark · 13 other hosts · 13 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.

156.239.252.191watermarklisted
111.229.4.108watermarklisted
47.86.184.71watermarklisted
123.207.214.140watermarklisted
1.94.100.198watermarklisted
39.102.58.148watermarklisted
23.95.48.157watermarklisted
47.83.3.103watermarklisted
43.155.9.112watermarklisted
130.94.12.21watermarklisted
111.228.49.20watermarklisted
65.49.233.218watermarklisted
8.148.26.139watermarklisted

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.

Deploy

Suricata rules and hunt queries for this address’s 2 listed listeners.

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 == "187.52.119.59" and RemotePort in (80, 443))
DeviceFileEvents
| where Timestamp > ago(30d)
| where SHA256 in ("2b3e2b125ad66f5bd6645eb6ad1ab588d9f8f5226c4e332f65f73576270345fd", "78c7fe6f87048dcd662d989b0f90413a11a711315efe69a0272c5b622701d1b3")
Microsoft Sentinel (KQL)
CommonSecurityLog
| where TimeGenerated > ago(30d)
| where (DestinationIP == "187.52.119.59" and DestinationPort in (80, 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="187.52.119.59" (All_Traffic.dest_port=80 OR 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="2b3e2b125ad66f5bd6645eb6ad1ab588d9f8f5226c4e332f65f73576270345fd" OR Filesystem.file_hash="78c7fe6f87048dcd662d989b0f90413a11a711315efe69a0272c5b622701d1b3")
    by Filesystem.dest Filesystem.file_path Filesystem.file_hash
Elastic (EQL)
network where
  (destination.ip == "187.52.119.59" and destination.port in (80, 443))
file where file.hash.sha256 in ("2b3e2b125ad66f5bd6645eb6ad1ab588d9f8f5226c4e332f65f73576270345fd", "78c7fe6f87048dcd662d989b0f90413a11a711315efe69a0272c5b622701d1b3")

Cite this record

Plain text, for a ticket or a report
Address 187.52.119.59 Family Cobalt Strike (command-and-control server) Ports :80, :443 Status listed (feed checked 2026-10-30 19:07 UTC) First seen 2026-09-20 Last confirmed 2026-09-23 Record https://publicmosaic.com/ip/187.52.119.59 Source Public Mosaic, TLP:CLEAR