""ET TROJAN Observed Cobalt Strike CnC Domain (www .msfthelpdesk .com in TLS SNI)""

SID: 2033644

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_08_02, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_08_02

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 14|www.msfthelpdesk.com"

Within:

PCRE:

Special Options:

source