# publicmosaic.sigma.yml — generated 2026-10-30 19:07 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: cert 0899ce1bf91dca23f61cf678dde86314fc47cbebe2ad54ce80e506d0d5241eda — https://publicmosaic.com/cert/0899ce1bf91dca23f61cf678dde86314fc47cbebe2ad54ce80e506d0d5241eda
# 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 0899ce1bf91dca23… — connections to listed C2 hosts'
id: 5c8e9611-7590-8961-988d-55e865e4ebfe
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/0899ce1bf91dca23f61cf678dde86314fc47cbebe2ad54ce80e506d0d5241eda'
author: 'Public Mosaic'
date: 2026-09-19
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p31337:
    DestinationIp:
      - 137.184.126.9
      - 24.144.71.145
    DestinationPort: 31337
  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