# publicmosaic.sigma.yml — generated 2026-10-30 19:07 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: asn 43641 — https://publicmosaic.com/asn/43641
# 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: 'AS43641 — connections to listed C2 hosts'
id: 55477807-47e3-844e-a314-eec487f12a28
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/43641'
author: 'Public Mosaic'
date: 2026-08-23
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p2000:
    DestinationIp:
      - 85.137.62.160
      - 85.137.62.224
      - 85.137.62.225
      - 85.137.62.249
    DestinationPort: 2000
  selection_p4782:
    DestinationIp:
      - 85.137.56.145
    DestinationPort: 4782
  selection_p31337:
    DestinationIp:
      - 85.137.58.194
      - 85.137.63.86
    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