""ET TROJAN Observed ClearFake Domain (businessresources .ltd in TLS SNI)""

SID: 2053413

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_06_10, deployment Perimeter, malware_family ClearFake, signature_severity Major, updated_at 2024_06_10

Reference:

  • md5

  • b3b735852084909f82121fd6fbbdeb68

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|"

  • Value: "|01|"

  • Value: "|00 00|"

  • Value: "|00|"

  • Value: "businessresources.ltd"

Within: 1

PCRE: "/^(?:\x00\x15|.\x2e)businessresources.ltd/R"

Special Options:

source