""ET TROJAN Observed DCRat Related Domain (crystalfiles .ru in TLS SNI)""

SID: 2036640

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_05_20, deployment Perimeter, malware_family DCRat, signature_severity Major, updated_at 2022_05_20

Reference:

• Link

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 0f|crystalfiles.ru"

Within: 8

PCRE:

Special Options:

• fast_pattern

source