""ET TROJAN Win32/OriginLoader CnC Checkin""

SID: 2047004

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_07_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_08_10

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: "/gate"

  • Value: "x-key|3a 20|"

  • Value: "p=" Depth: 2

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/x-key\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nContent-Type\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nExpect\x3a\x20[^\r\n]+\r\n\r\n/Hm"

Special Options:

  • http_method

  • http_uri

  • http_header

  • fast_pattern

  • http_client_body

  • http_header

source