""ET WEB_SERVER China Chopper WebShell Observed Outbound""

SID: 2027393

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Web_Server_Applications, attack_target Server, created_at 2019_05_29, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_05_29

Reference:

Protocol: tcp

Source Network: $HTTP_SERVERS

Source Port: $HTTP_PORTS

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,from_server

Contents:

  • Value: "200"

  • Value: "|3c 25 40 20|Page|20|Language=|22|Jscript|22 25 3e 3c 25|eval|28|"

  • Value: "FromBase64String"

  • Value: "|25 3e|"

Within:

PCRE:

Special Options:

  • http_stat_code

  • file_data

  • fast_pattern

  • nocase

source