""ET INFO Observed Cloudflare Tunneling Domain (argotunnel .com in TLS SNI)""
SID: 2047123
Revision: 2
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2023_08_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_09_01
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|"
-
Value: "|00|"
-
Value: "argotunnel.com"
Within: 1
PCRE: "/^(?:\x00\x0e|.\x2e)argotunnel.com/R"
Special Options: