""ET TROJAN [401TRG] Observed Backdoor.SUNBURST CnC Domain (bigtopweb .com in TLS SNI)""

SID: 2031541

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_01_25, deployment Perimeter, signature_severity Major, updated_at 2021_01_25

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|" Depth: 1

  • Value: "|01|"

  • Value: "|00 00 0d|bigtopweb.com"

Within:

PCRE:

Special Options:

source