""ET CURRENT_EVENTS Possible Phishing Landing - Data URI Inline Javascript Mar 07 2016""
SID: 2022597
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2016_03_07, deployment Perimeter, signature_severity Critical, tag Phishing, updated_at 2017_10_13, 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,to_client
Contents:
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Value: "200"
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Value: "Content-Type|3a 20|text/html"
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Value: "data|3a|text/html|3b|"
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Value: "|3b|base64,"
Within: 21
PCRE: "/^[^\x22|\x27]+<\s?script(?:(?!<\s?\/\s*?script).)+?data\x3atext\/html\x3b(?:charset=UTF-8\x3b)?base64\x2c/si"
Special Options:
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http_stat_code
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http_header
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file_data
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fast_pattern