""ET TROJAN Observed Malicious SSL Cert (DonotGroup FireStarter CnC)""

SID: 2031165

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_and_Server, created_at 2020_11_02, deployment Perimeter, malware_family Firestarter, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, tag DonotGroup, updated_at 2020_11_02, 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: "|0d|inapturst.top"

Within: 14

PCRE:

Special Options:

• fast_pattern

source