Coinhive JavaScript Miner Detection

# SPDX-FileCopyrightText: 2018 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108334");
  script_version("2023-07-20T05:05:17+0000");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2018-02-12 15:41:40 +0100 (Mon, 12 Feb 2018)");
  script_name("Coinhive JavaScript Miner Detection");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Malware");
  script_dependencies("webmirror.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("www/coinhive/detected");

  script_xref(name:"URL", value:"https://nakedsecurity.sophos.com/2018/02/12/cryptomining-script-poisons-government-websites-what-to-do/");

  script_tag(name:"summary", value:"This script reports if a web page of the remote host contains code from the
  Coinhive JavaScript Miner.");

  script_tag(name:"insight", value:"While the Coinhive JavaScript Miner might be deployed legitimately, it is often
  used by attackers for malicious purposes to consume unauthorized resources of a client browsing a web site.

  This script reports results of rudimentary checks for the following strings embedded into any web page of the remote host:

  - CoinHive.Anonymous

  - CoinHive.User

  - CoinHive.Token

  NOTE: There are various obfuscation technologies available to hide such JavaScript from the scanner, thus the mentioned
  'rudimentary checks' above.

  NOTE2: No vulnerability is reported if the Coinhive JavaScript is loaded from the authedmine.com domain. This JavaScript
  code only run after an explicit opt-in / agreement from the user.");

  script_tag(name:"impact", value:"If the Coinhive JavaScript Miner is started without a configured OptOut possibility for the
  client, unauthorized resources of this client will be used.");

  script_tag(name:"solution", value:"Inspect all reported web pages / URLs if the Coinhive JavaScript Miner was
  deployed legitimately and remove it if not.");

  script_tag(name:"qod_type", value:"remote_banner");
  script_tag(name:"solution_type", value:"Mitigation");

  exit(0);
}

include("http_func.inc");
include("port_service_func.inc");

port = http_get_port( default:80 );
host = http_host_name( dont_add_port:TRUE );

chOptOutList     = get_kb_list( "www/" + host + "/" + port + "/content/coinhive_optout" );
chNoOptOutList   = get_kb_list( "www/" + host + "/" + port + "/content/coinhive_nooptout" );
chObfuscatedList = get_kb_list( "www/" + host + "/" + port + "/content/coinhive_obfuscated" );

if( ! isnull( chOptOutList ) || ! isnull( chNoOptOutList ) || ! isnull( chObfuscatedList ) ) {

  report += 'The Coinhive JavaScript Miner was found embedded into the following pages:\n\n';

  # Sort to not report changes on delta reports if just the order is different
  if( chOptOutList )     chOptOutList     = sort( chOptOutList );
  if( chNoOptOutList )   chNoOptOutList   = sort( chNoOptOutList );
  if( chObfuscatedList ) chObfuscatedList = sort( chObfuscatedList );

  foreach chOptOut( chOptOutList ) {
    report += chOptOut + ' (OptOut configured for the user)\n';
  }

  foreach chNoOptOut( chNoOptOutList ) {
    report += chNoOptOut + ' (No OptOut configured for the user, might be malicious)\n';
  }

  foreach chObfuscated( chObfuscatedList ) {
    report += chObfuscated + ' (Obfuscated, look out for code containing \\x73\\x70\\x6C\\x69\\x74. Very likely malicious)\n';
  }

  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );