""ET TROJAN Cobalt Strike Beacon Activity (GET)""
SID: 2032336
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2021_03_25, deployment Perimeter, signature_severity Major, tag c2, updated_at 2021_03_26, 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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45ec8cee2c028e47d3bba2e14a93a957
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: "|20|/logo|20|HTTP/1."
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Value: !"Referer|3a 20|"
Within:
PCRE: "/^Accept[^\r\n]+\r\nHost[^\r\n]+\r\nConnection[^\r\n]+\r\nAccept-Encoding[^\r\n]+\r\n/Hm"
Special Options:
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http_method
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fast_pattern
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http_header