""ET TROJAN Observed Various Malware Staging Domain (direct-trojan .com in TLS SNI)""

SID: 2043291

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_01_12, deployment Perimeter, signature_severity Major, updated_at 2023_01_12, reviewed_at 2023_09_01

Reference:

  • md5

  • f4a68987e0ef243fa1e9bfe07c643052

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 11|direct-trojan.com"

Within: 8

PCRE:

Special Options:

  • fast_pattern

source