""ET TROJAN EvilNum CnC Checkin""

SID: 2030526

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: "GET"

  • Value: "/Validate/valsrv" Depth: 16

  • Value: !"User-Agent"

  • Value: !"Referer"

  • Value: !"Accept-"

Within:

PCRE: "/^Host[^\r\n]+\r\nConnection[^\r\n]+\r\n(?:\r\n)?$/H"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_header

  • http_header

  • http_header

source