# publicmosaic.sigma.yml — generated 2026-10-30 19:07 UTC — TLP:CLEAR
# source: https://publicmosaic.com — published for defensive use
# scope: asn 209101 — https://publicmosaic.com/asn/209101
# 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: 'AS209101 — connections to listed C2 hosts'
id: dded3c96-4361-87ef-bfb9-318f40042b25
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/209101'
author: 'Public Mosaic'
date: 2026-09-17
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: network_connection
detection:
  selection_p443:
    DestinationIp:
      - 85.11.182.104
      - 94.26.81.135
    DestinationPort: 443
  selection_p31337:
    DestinationIp:
      - 185.95.156.181
    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
---
title: 'AS209101 — beacon URI or user agent in a request to a listed host'
id: 054cc8f9-c784-8d2b-a8f0-ebf0a1b11050
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/209101'
author: 'Public Mosaic'
date: 2026-09-17
modified: 2026-10-30
tags:
  - attack.command_and_control
  - tlp.clear
logsource:
  category: proxy
detection:
  selection_dst:
    DestinationIp:
      - 185.95.156.181
      - 85.11.182.104
      - 94.26.81.135
  selection_uri:
    c-uri|contains:
      - '/submit.php'
      - '/visit.js'
  selection_ua:
    c-useragent:
      - 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0; BO1IE8_v1;ENUS)'
  condition: selection_dst and (selection_uri or selection_ua)
falsepositives:
  - 'A benign request to a listed address carrying a commodity user agent'
level: high