# publicmosaic.sigma.yml — generated 2026-10-30 19:07 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: asn 213438 — https://publicmosaic.com/asn/213438
# covers listed listeners only; archived listings omitted: 0
# A withdrawal can take up to five minutes to reach this file. Each address's page under publicmosaic.com/ip/ is authoritative.
title: 'AS213438 — connections to listed C2 hosts'
id: 3684ef40-f93c-86ae-b9e7-91c99a3995ef
status: experimental
description: 'Outbound connection to an address Public Mosaic listed as a C2 host when this file was generated.'
references:
  - 'https://publicmosaic.com/asn/213438'
author: 'Public Mosaic'
date: 2026-09-27
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p80:
    DestinationIp:
      - 37.60.141.43
    DestinationPort: 80
  selection_p400:
    DestinationIp:
      - 37.60.141.43
    DestinationPort: 400
  selection_p443:
    DestinationIp:
      - 193.142.146.172
      - 37.60.141.43
      - 5.253.86.251
    DestinationPort: 443
  selection_p8443:
    DestinationIp:
      - 37.60.141.43
    DestinationPort: 8443
  selection_p9090:
    DestinationIp:
      - 37.60.141.43
    DestinationPort: 9090
  condition: 1 of selection_*
falsepositives:
  - 'Shared hosting: an address can later serve other tenants. Its host page shows whether it is still listed.'
level: high