""ET INFO Observed Abused File Sharing/CRM Platform (flg .to in TLS SNI)""
SID: 2052636
Revision: 1
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2024_05_16, deployment Perimeter, signature_severity Informational, tag TA_Abused_Service, updated_at 2024_05_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|"
-
Value: "|00|"
-
Value: "flg.to"
Within: 1
PCRE: "/^(?:\x00\x06|.\x2e)flg.to/R"
Special Options: