""ET TROJAN CoreDn CnC Checkin M2""

SID: 2026866

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_31, deployment Perimeter, malware_family CoreDn, performance_impact Low, signature_severity Major, tag APT, updated_at 2019_01_31

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/lib.asp?search="

  • Value: "Accept|3a 20|/|0d|"

  • Value: "Accept-Encoding|3a 20|gzip, deflate|0d|"

  • Value: !"Referer|3a|"

  • Value: !"Cache"

Within:

PCRE: "/\/lib.asp\?search=[a-z0-9]{5,30}$/Ui"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

source