""ET INFO Observed Suspicious Domain (f5sec .s3 .il-central-1 .amazonaws .com in TLS SNI)""

SID: 2049832

Revision: 1

Class Type: misc-activity

Metadata: attack_target Client_Endpoint, created_at 2023_12_22, deployment Perimeter, signature_severity Informational, updated_at 2023_12_22

Reference:

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 23|f5sec.s3.il-central-1.amazonaws.com"

Within: 8

PCRE:

Special Options:

• fast_pattern

source