# publicmosaic.sigma.yml — generated 2026-10-30 19:37 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: cert a8b18f51cccbace3c51cf97127aa51452e8a776af76cb69efadbe6f6e46f78f3 — https://publicmosaic.com/cert/a8b18f51cccbace3c51cf97127aa51452e8a776af76cb69efadbe6f6e46f78f3
# 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: 'Certificate a8b18f51cccbace3… — connections to listed C2 hosts'
id: 8f83385a-1d83-8374-b131-c9700689f61d
status: experimental
description: 'Outbound connection to an address Public Mosaic listed as a C2 host when this file was generated.'
references:
  - 'https://publicmosaic.com/cert/a8b18f51cccbace3c51cf97127aa51452e8a776af76cb69efadbe6f6e46f78f3'
author: 'Public Mosaic'
date: 2026-10-11
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p443:
    DestinationIp:
      - 223.26.52.38
      - 223.26.52.42
    DestinationPort: 443
  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