""ET INFO Observed Telegram API Domain (api .telegram .org in TLS SNI)""
SID: 2033967
Revision: 2
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, performance_impact Low, signature_severity Informational, updated_at 2021_09_16
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 10|api.telegram.org"
Within: 8
PCRE:
Special Options:
- fast_pattern