""ET TROJAN Possible Turla Carbon Paper CnC Beacon (Fake User-Agent)""
SID: 2024183
Revision: 3
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_04_06, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_22, 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: established,to_server
Contents:
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Value: "GET"
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Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b| MSIE "
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Value: "."
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Value: ".0|3b| Windows NT "
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Value: "Trident/"
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Value: "Referer|3a|"
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Value: "Cookie|3a 20|PHPSESSID="
Within: 2
PCRE: "/^User-Agent\x3a Mozilla\/4.0 (compatible\x3b MSIE \d{1,2}.0.\d+.\d+.0\x3b Windows NT /Hmi"
Special Options:
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http_method
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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