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

SID: 2027619

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_06_27, deployment Perimeter, malware_family Quasar, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, tag RAT, updated_at 2019_06_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

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|Quasar Server CA"

Within: 17

PCRE:

Special Options:

  • fast_pattern

source