# publicmosaic.sigma.yml — generated 2026-10-30 20:37 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: asn 209272 — https://publicmosaic.com/asn/209272
# 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: 'AS209272 — connections to listed C2 hosts'
id: 45c0c0e0-3c6d-8ec3-827d-79037ccddf3f
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/209272'
author: 'Public Mosaic'
date: 2026-09-22
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p443:
    DestinationIp:
      - 45.227.253.132
    DestinationPort: 443
  selection_p50050:
    DestinationIp:
      - 45.227.253.132
    DestinationPort: 50050
  selection_p56223:
    DestinationIp:
      - 45.227.253.132
    DestinationPort: 56223
  selection_p56225:
    DestinationIp:
      - 45.227.253.132
    DestinationPort: 56225
  selection_p58993:
    DestinationIp:
      - 45.227.253.132
    DestinationPort: 58993
  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
---
title: 'AS209272 — beacon URI or user agent in a request to a listed host'
id: 71f31bc4-9aee-8497-b7a1-368d4d56c277
status: experimental
description: 'A request to a listed address carrying a URI or user agent from a configuration recovered for these hosts. Both conditions are required: either value alone is common.'
references:
  - 'https://publicmosaic.com/asn/209272'
author: 'Public Mosaic'
date: 2026-09-22
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: proxy
detection:
  selection_dst:
    DestinationIp:
      - 45.227.253.132
  selection_uri:
    c-uri|contains:
      - '/activity'
      - '/ptj'
      - '/push'
      - '/submit.php'
  selection_ua:
    c-useragent:
      - 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0)'
      - 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)'
      - 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; Touch; ASU2JS)'
  condition: selection_dst and (selection_uri or selection_ua)
falsepositives:
  - 'A benign request to a listed address carrying a commodity user agent'
level: high