# publicmosaic.sigma.yml — generated 2026-10-30 18:37 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: cert 57a05de129b30a407780ff40fb5dbfd8a1917ee3c5ca1ef280e8cf6d24097b0a — https://publicmosaic.com/cert/57a05de129b30a407780ff40fb5dbfd8a1917ee3c5ca1ef280e8cf6d24097b0a
# 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 57a05de129b30a40… — connections to listed C2 hosts'
id: aec56da2-b830-89ce-9628-9c5fb77b06fb
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/57a05de129b30a407780ff40fb5dbfd8a1917ee3c5ca1ef280e8cf6d24097b0a'
author: 'Public Mosaic'
date: 2026-08-23
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p443:
    DestinationIp:
      - 154.92.252.58
      - 154.92.252.59
      - 154.92.252.60
      - 154.92.252.61
      - 154.92.252.62
    DestinationPort: 443
  selection_p4321:
    DestinationIp:
      - 154.92.252.59
      - 154.92.252.60
      - 154.92.252.61
      - 154.92.252.62
      - 39.105.16.200
      - 8.137.111.232
    DestinationPort: 4321
  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