""ET TROJAN Observed Ursnif Domain (mifrutty .com in TLS SNI)""
SID: 2048487
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2023_10_06, deployment Perimeter, malware_family ursnif, signature_severity Major, updated_at 2023_10_06, reviewed_at 2024_01_26
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 0c|mifrutty.com"
Within: 8
PCRE:
Special Options:
- fast_pattern