""ET TROJAN Observed CobaltStrike CnC Domain in TLS SNI""

SID: 2030450

Revision: 2

Class Type: trojan-activity

Metadata: created_at 2020_07_03, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, signature_severity Major, updated_at 2020_07_03

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: to_server,established

Contents:

  • Value: "|16|" Depth: 1

  • Value: "|00 00 0d|traffichi.com"

Within:

PCRE:

Special Options:

  • fast_pattern

  • nocase

source