""ET TROJAN Cobalt Strike Malleable C2 Profile (Teams) M2""
SID: 2032976
Revision: 1
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_05_18, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, signature_severity Major, updated_at 2021_05_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "GET"
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Value: "Authentication|3a 20|skypetoken=eyJhbGciOi"
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Value: "Accept|3a 20|json|0d 0a|"
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Value: "Referer|3a 20|https://teams.microsoft.com/_|0d 0a|"
Within:
PCRE: "/Authentication\x3a\x20skypetoken=eyJhbGciOi(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/H"
Special Options:
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http_method
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fast_pattern
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http_header
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http_header
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http_header