""ET TROJAN Cobalt Strike Beacon Observed""
SID: 2033713
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2015_09_09, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_09_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
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md5
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d3f53580f7ce72caf9be799106ad89ca
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: "GET"
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Value: "HTTP/1.1|0d 0a|Accept|3a 20|/|0d 0a|Cookie|3a 20|"
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Value: !"Referer|3a|"
Within:
PCRE: "/^[a-zA-Z0-9/+]{171}=/R"
Special Options:
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http_method
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http_header