""ET TROJAN Cobalt Strike Activity (GET)""

SID: 2034057

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_09_30, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2021_09_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation

Reference:

• md5

• cc13942c46fb85a5754570c2b2c06e35

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: "/jquery-ajaxSuccess.js"

Within:

PCRE: "/^__cfduid=[a-zA-Z0-9_-]{171}$/C"

Special Options:

• http_method

• http_uri

• fast_pattern

source