""ET CURRENT_EVENTS HiYu - Request for Victim Enrichment""

SID: 2044318

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_02_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_02_24

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: "/api.php"

  • Value: "X-Requested-With|3a 20|XMLHttpRequest|0d 0a|"

  • Value: "API=" Depth: 4

  • Value: !"&"

Within:

PCRE: "/^Content-Length\x3a\x20(?:[2-9]|[1-9]\d|1\d{2}|200)[\r\n]+$/Hmi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_client_body

  • http_client_body

source