""ET INFO Observed URL Shortening Service Domain (n9 .cl in TLS SNI)""
SID: 2038607
Revision: 2
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2022_08_24, deployment Perimeter, signature_severity Informational, updated_at 2023_04_28
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 05|n9.cl"
Within: 8
PCRE:
Special Options:
- fast_pattern