""ET TROJAN Ironhalo CnC Beacon""

SID: 2022298

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_12_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_12_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• Link

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: ".php"

• Value: !"Accept-"

• Value: !"Referer|3a|"

• Value: "User-Agent|3a 20|Mozilla/4.0(compatible|3b|MSIE 8.0|3b|Windows NT 6.1|29 0d 0a|"

Within:

PCRE: "/.php$/U"

Special Options:

• http_method

• http_uri

• http_header

• http_header

• http_header

source