""ET TROJAN Cobalt Strike Activity (GET)""
SID: 2034347
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2021_11_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2021_11_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET /9Wla HTTP/1.1"
-
Value: !"Referer|3a 20|"
Within:
PCRE: "/^Host\x3a\x20\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/Hm"
Special Options:
-
fast_pattern
-
http_header