""ET TROJAN Cobalt Strike Beacon Observed (MASB UA)""
SID: 2032945
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2021_05_12, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, tag c2, updated_at 2021_05_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
-
md5
-
8079676dd62582da4d2e9d2448c1142d
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: "User-Agent|3a 20|Mozilla/5.0|20|(compatible|3b 20|MSIE 9.0|3b 20|Windows NT|20|6.1|3b 20|WOW64|3b 20|Trident/5.0|3b 20|MASB)|0d 0a|"
-
Value: !"Referer|3a 20|"
Within:
PCRE: "/^[a-zA-Z0-9/+]{171}=$/C"
Special Options:
-
http_method
-
http_header
-
http_header