""ET TROJAN Observed Default CobaltStrike SSL Certificate""

SID: 2030111

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_05_06, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2020_05_06

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|55 04 06|"

  • Value: "|05|Earth"

  • Value: "|55 04 07|"

  • Value: "|09|Somewhere"

  • Value: "|55 04 0a|"

  • Value: "|0c|cobaltstrike"

  • Value: "|55 04 0b|"

  • Value: "|12|AdvancedPenTesting"

  • Value: "|55 04 03|"

  • Value: "|13|Major Cobalt Strike"

Within: 20

PCRE:

Special Options:

  • fast_pattern

source