""ET TROJAN Agrius Group Webshell File Upload Attempt""

SID: 2049904

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Microsoft_IIS, attack_target Web_Server, created_at 2024_01_03, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_01_03

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: ".aspx"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|"

  • Value: "name|3d 22|Fhq|22 3b 20|filename|3d 22|"

  • Value: "name|3d 22|RvOp|22 0d 0a 0d 0a|Upload|0d 0a|"

Within:

PCRE: "/.aspx$/U"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

source