""ET TROJAN W32/Waterspout.APT Backdoor CnC Beacon""

SID: 2019115

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2014_09_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_11_05, 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,443]

Flow: to_server,established

Contents:

• Value: "GET " Depth: 4

• Value: ".php?"

• Value: "_id="

Within: 4

PCRE: "/\/(?P[a-z]{3})[a-z].php\?(?P=s1)_id=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})\sHTTP\/1./"

Special Options:

• fast_pattern

source