""ET TROJAN H1N1 Loader CnC Beacon M2""

SID: 2021140

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_05_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_05_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

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: ".php"

  • Value: !"Referer|3a|"

  • Value: "Accept|3a 20|/|0d 0a|accept-Encoding|3a 20|none|0d 0a|accept-Language|3a 20|" Depth: 53

  • Value: "N0BRBh" Depth: 6

Within:

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_client_body

  • fast_pattern

source