# publicmosaic.sigma.yml — generated 2026-10-30 20:07 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: asn 203861 — https://publicmosaic.com/asn/203861
# 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: 'AS203861 — connections to listed C2 hosts'
id: 298cf68a-1326-8697-bac4-2e163cbcc845
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/203861'
author: 'Public Mosaic'
date: 2026-09-11
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p443:
    DestinationIp:
      - 217.60.77.60
    DestinationPort: 443
  selection_p5173:
    DestinationIp:
      - 217.60.77.60
      - 217.60.77.63
    DestinationPort: 5173
  selection_p56001:
    DestinationIp:
      - 217.60.77.63
    DestinationPort: 56001
  selection_p56002:
    DestinationIp:
      - 217.60.77.63
    DestinationPort: 56002
  selection_p56003:
    DestinationIp:
      - 217.60.77.63
    DestinationPort: 56003
  selection_p56004:
    DestinationIp:
      - 217.60.77.60
    DestinationPort: 56004
  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