""ET TROJAN Observed Malicious SSL/TLS Certificate (APT-C-55/BabyShark Staging Domain)""

SID: 2036886

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_and_Server, created_at 2022_06_07, deployment Perimeter, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_06_07, 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: "|06 03 55 04 03|"

• Value: "|0c|retmodul.com"

Within: 13

PCRE:

Special Options:

• fast_pattern

source