""ET TROJAN Possible Regin Init CnC Beacon TCP""

SID: 2019816

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2014_11_26, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_11_26, 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: any

Flow: established,to_server

Contents:

  • Value: "A" Depth: 1

  • Value: "AAA"

  • Value: "s" Depth: 1 Offset: 8

  • Value: "h"

  • Value: "i"

  • Value: "t"

Within: 1

PCRE:

Special Options:

  • base64_decode

  • base64_data

source