""ET TROJAN Andromeda Checkin""

SID: 2016223

Revision: 8

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2012_03_30, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2021_11_10, reviewed_at 2024_03_19

Reference:

  • md5

  • 41c33fdb9a95353a3b109393543f90dd

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "User-Agent|3a 20|Mozilla/4.0|0d 0a|"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept"

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: "Content-Length|3a 20|"

Within:

PCRE: "/^(?:[A-Za-z0-9+/]{4})(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})(\r\n(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4}))?$/Pi"

Special Options:

  • nocase

  • http_method

  • http_header

  • http_header

  • http_header

  • http_header

  • http_header

source