""ET CURRENT_EVENTS Successful Generic AES Phish M2 Oct 24 2017""
SID: 2024998
Revision: 4
Class Type: trojan-activity
Metadata: affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_10_24, deployment Perimeter, signature_severity Critical, tag Phishing, updated_at 2017_11_20, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,from_server
Contents:
-
Value: "Content-Type|3a 20|text/html"
-
Value: "Aes.Ctr.decrypt"
Within:
PCRE: "/^\s?(\s[^,]+,\s?[^,]+,\s?(?:128|256|512)\s*?)/Rsi"
Special Options:
-
http_header
-
file_data
-
nocase
-
fast_pattern