""ET TROJAN OSX/SHLAYER CnC Activity M2""

SID: 2038612

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2022_08_25, deployment Perimeter, malware_family Shlayer, performance_impact Low, signature_severity Major, updated_at 2022_08_25

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "POST"

• Value: "/l"

• Value: "|20 28|unknown|20|version|29 20|CFNetwork|2f|"

• Value: "cs=" Depth: 3

• Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

Within:

PCRE: "/^cs=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})/P"

Special Options:

• http_method

• http_uri

• http_client_body

• http_header

source