""ET TROJAN OSX/GMERA.B CnC Checkin""

SID: 2028620

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2019_09_24, deployment Perimeter, signature_severity Major, updated_at 2019_09_24

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: "/link.php?" Depth: 10

  • Value: "&"

  • Value: !"Referer|3a|"

Within:

PCRE: "/^\/link.php\?[^\r\n]+&[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

source