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

SID: 2030409

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 2020_06_30, deployment Perimeter, malware_family AsyncRAT, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2020_06_30, 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: established,to_client

Contents:

• Value: "|55 04 03|"

• Value: "|06|Lyhr0x"

Within: 7

PCRE:

Special Options:

• fast_pattern

source