""ET TROJAN Cobalt Strike Beacon Activity (GET)""
SID: 2033142
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2021_06_15, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2021_06_15, 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: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: ".html?inc="
-
Value: "affiliate_id=" Depth: 13
-
Value: !"Referer|3a 20|"
Within:
PCRE: "/^affiliate_id=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/C"
Special Options:
-
http_method
-
fast_pattern
-
http_uri
-
http_cookie
-
http_header