""ET TROJAN ISMAgent CnC Checkin 1""

SID: 2024502

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_28, deployment Perimeter, malware_family Ismdoor, performance_impact Moderate, signature_severity Major, updated_at 2017_07_31

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/action2/"

  • Value: "User-Agent|3a 20|Firefox|0d 0a|"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

source