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

SID: 2034728

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_12_14, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2021_12_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation

Reference:

• md5

• c681c785d6055a1d5a8fe74403c9dfe9

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "GET /image-directory/templates.mp3 HTTP/1.1"

• Value: "Accept|3a 20|image/jpeg|0d 0a|"

• Value: !"Referer|3a 20|"

Within:

PCRE:

Special Options:

• fast_pattern

• http_header

• http_header

source