""ET TROJAN W32/Farfli.BHQ!tr Dropper CnC Beacon""

SID: 2019946

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2014_12_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_12_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • cb53a6e8d65d86076fc0c94dac62aa77

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "GET /php.php HTTP/1." Depth: 20

  • Value: "User-Agent|3A| Mozilla/4.0 (compatible)"

Within:

PCRE: "/Host\x3A\x20\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x2E\d{1,3}/"

Special Options:

  • fast_pattern

source