""ET INFO Observed Commonly Actor Abused Online Service Domain (usrfiles .com in TLS SNI)""
SID: 2054540
Revision: 1
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2024_07_17, deployment Perimeter, signature_severity Informational, updated_at 2024_07_17
Reference:
-
md5
-
d1528b4fd48104873a60abd4c5477d8d
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: "usrfiles.com"
Within: 1
PCRE: "/^(?:\x00\x0c|.\x2e)usrfiles.com/R"
Special Options: