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

SID: 2039691

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_11_03, deployment Perimeter, malware_family ursnif, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_11_03

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|06 03 55 04 03|"

  • Value: "|0b|tornton.xyz"

Within: 12

PCRE:

Special Options:

  • fast_pattern

source