""ET TROJAN Backdoor.Elise CnC Beacon 2""
SID: 2021276
Revision: 4
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2015_06_16, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_29, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: to_server,established
Contents:
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Value: "POST"
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Value: ".html"
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Value: !"Content-Type|3a|"
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Value: !"Accept-"
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Value: !"Referer|3a|"
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Value: "Content-Length|3a 20|0|0d 0a|"
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Value: !"Host|3 a20|www.youdao.com"
Within:
PCRE: "/\/\d{8,10}.html$/Ui"
Special Options:
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http_method
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nocase
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http_uri
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http_header
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http_header
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http_header
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http_header
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http_header