""ET TROJAN Cobalt Strike Activity (GET)""
SID: 2037735
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2022_07_11, deployment Perimeter, malware_family Cobalt_Strike, malware_family TA471, malware_family UNC2589, signature_severity Major, updated_at 2022_07_11, 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: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
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Value: "/field-keywords/"
-
Value: "PREF=ID=" Depth: 8
-
Value: !"Referer|3a 20|"
Within:
PCRE: "/^PREF\x3dID\x3d[A-Za-z0-9]{262}$/C"
Special Options:
-
http_method
-
http_uri
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fast_pattern
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http_cookie
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http_header