""ET INFO Observed URL Shortening Service Domain (appurl .io in TLS SNI)""
SID: 2048228
Revision: 1
Class Type: bad-unknown
Metadata: attack_target Client_Endpoint, created_at 2023_09_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_09_25, reviewed_at 2024_04_29
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 09|appurl.io"
Within: 8
PCRE:
Special Options:
- fast_pattern