""ET TROJAN Observed CCoreDoor C2 Domain (message .ooguy .com in TLS SNI)""

SID: 2053340

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_06_07, deployment Perimeter, signature_severity Major, updated_at 2024_06_07

Reference:

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: "message.ooguy.com"

Within: 1

PCRE: "/^(?:\x00\x11|.\x2e)message.ooguy.com/R"

Special Options:

source