""ET TROJAN Observed Malicious SSL Cert (Bazar Backdoor)""

SID: 2032313

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_and_Server, created_at 2021_03_23, deployment Perimeter, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2021_03_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

  • md5

  • 4cf6fb8514073319e7759b4f66d13f08

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|KZ"

  • Value: "|06 03 55 04 08|"

  • Value: "|06|Astana"

  • Value: "|06 03 55 04 07|"

  • Value: "|06|Astana"

  • Value: "|06 03 55 04 0a|"

  • Value: "|07|NN Fern"

  • Value: "|06 03 55 04 0b|"

  • Value: "|09|KZ System"

  • Value: "|06 03 55 04 03|"

  • Value: "|0b|forenzik.kz"

Within: 12

PCRE:

Special Options:

  • fast_pattern

source