# publicmosaic.sigma.yml — generated 2026-10-30 19:37 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: cert c1c5642a1fc1c6c7f48478cee6d91659d351ebdae92527dd21a0fe4020931d97 — https://publicmosaic.com/cert/c1c5642a1fc1c6c7f48478cee6d91659d351ebdae92527dd21a0fe4020931d97
# 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 c1c5642a1fc1c6c7… — connections to listed C2 hosts'
id: 2bd6addc-4985-897d-82f3-f81fa88346aa
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/c1c5642a1fc1c6c7f48478cee6d91659d351ebdae92527dd21a0fe4020931d97'
author: 'Public Mosaic'
date: 2026-10-16
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p31337:
    DestinationIp:
      - 45.129.8.190
      - 5.253.17.131
    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