""ET TROJAN Observed Malicious SSL Cert (CobaltStrike CnC)""

SID: 2030455

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_and_Server, created_at 2020_07_03, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2020_07_03, mitre_tactic_id TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|55 04 03|"

  • Value: "|10|adsmarketart.com"

Within: 17

PCRE:

Special Options:

  • fast_pattern

source