""ET TROJAN Observed Malicious SSL Cert (Microsoft Security localhost)""

SID: 2037710

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_07_07, deployment Perimeter, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_07_07

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 06|"

  • Value: "|02|US"

  • Value: "|06 03 55 04 08|"

  • Value: "|0a|California"

  • Value: "|06 03 55 04 0a|"

  • Value: "|09|Microsoft"

  • Value: "|06 03 55 04 0b|"

  • Value: "|08|Security"

  • Value: "|06 03 55 04 03|"

  • Value: "|09|localhost"

Within: 10

PCRE:

Special Options:

  • fast_pattern

source