""ET TROJAN [Fireeye] Backdoor.BEACON SSL Cert Inbound (zupertech .com)""

SID: 2031353

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_14, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_12_15, 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: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|06 03 55 04 03|"

  • Value: "|0d|zupertech.com"

Within: 14

PCRE:

Special Options:

  • fast_pattern

source