""ET TROJAN EvilNum CnC Client Data Exfil""

SID: 2030529

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_07_15, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2020_07_15

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: "/Validate/getcommand" Depth: 20

  • Value: "action=" Depth: 7

  • Value: "&uid="

Within:

PCRE: "/\/getcommand$/U"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_client_body

  • http_client_body

source