""ET CURRENT_EVENTS Client Cloaking Javascript Observed""
SID: 2033947
Revision: 1
Class Type: trojan-activity
Metadata: affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_09_14, deployment Perimeter, performance_impact Low, signature_severity Minor, updated_at 2021_09_14
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,to_client
Contents:
-
Value: "200"
-
Value: "|3c|html|3e 3c|head|3e 3c|script|20|src|3d 27|"
-
Value: "Aes|2e|Ctr|2e|decrypt|28|"
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Value: "document|2e|write|28|output|29|"
Within:
PCRE: "/^(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s256)\x3b/Ri"
Special Options:
-
http_stat_code
-
file_data
-
nocase
-
fast_pattern