""ET TROJAN Async RAT CnC Activity (GET)""

SID: 2052950

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_05_29, deployment Perimeter, malware_family AsyncRAT, signature_severity Major, tag c2, updated_at 2024_05_29, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

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"

  • Value: "|2e|php|3f|s|3d|"

  • Value: "|0d 0a|Connection|3a 20|Keep-Alive|0d 0a|"

  • Value: !"Referer|3a 20|"

  • Value: !"User-Agent|3a 20|"

Within:

PCRE: "/\x2f\w\x20\w{5}\x20\w\x2ephp\x3fs\x3d\d{3}$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

source