""ET POLICY Possible External IP Lookup Domain Observed in SNI (ipinfo. io)""

SID: 2025331

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, created_at 2018_02_07, deployment Perimeter, performance_impact Low, signature_severity Minor, updated_at 2022_03_24

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|" Depth: 1

  • Value: "|01|"

  • Value: "|00 00 09|ipinfo.io"

Within:

PCRE:

Special Options:

source