""ET TROJAN Cobalt Strike Beacon Activity (GET)""
SID: 2033669
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2021_08_04, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, updated_at 2021_08_04
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: "Cookie|3a 20|reg_fb_gate="
-
Value: !"Referer|3a 20|"
Within:
PCRE: "/^reg_fb_gate=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/C"
Special Options:
-
http_method
-
fast_pattern
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http_header
-
http_header