""ET TROJAN Observed GobRAT Domain (ktlvz .dnsfailover .net) in TLS SNI""

SID: 2046733

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Linux, attack_target Networking_Equipment, created_at 2023_07_05, deployment Perimeter, malware_family GobRAT, performance_impact Low, signature_severity Major, tag RAT, updated_at 2023_07_05, reviewed_at 2023_10_06

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 15|ktlvz.dnsfailover.net"

Within: 8

PCRE:

Special Options:

• fast_pattern

source