""ET TROJAN Win32/AsyncRAT CnC Checkin (GET)""

SID: 2051076

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_02_23, deployment Perimeter, malware_family AsyncRAT, performance_impact Significant, confidence High, signature_severity Critical, updated_at 2024_02_23

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: ".php?id="

  • Value: "&key="

  • Value: "&s="

  • Value: "WindowsPowerShell/"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept|3a 20|"

Within:

PCRE: "/User-Agent\x3a\x20[^\r\n]+WindowsPowerShell\//Hmi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

  • http_header

  • http_header

source