w32.spybot.fcd worm infection

# SPDX-FileCopyrightText: 2004 jorge rodriguez
# 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("1.3.6.1.4.1.25623.1.0.15520");
  script_version("2023-08-03T05:05:16+0000");
  script_tag(name:"last_modification", value:"2023-08-03 05:05:16 +0000 (Thu, 03 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"7.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_name("w32.spybot.fcd worm infection");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2004 jorge rodriguez");
  script_family("Malware");
  script_dependencies("find_service1.nasl", "os_detection.nasl");
  script_require_ports(113);
  script_exclude_keys('fake_identd/113');
  script_mandatory_keys("Host/runs_windows");

  script_xref(name:"URL", value:"http://securityresponse.symantec.com/avcenter/venc/data/w32.spybot.fcd.html");

  script_tag(name:"summary", value:"The remote system is infected with a variant of the worm w32.spybot.fcd.");

  script_tag(name:"impact", value:"Infected systems will scan systems that are vulnerable in the same subnet
  in order to attempt to spread.

  This worm also tries to do DDoS against targets in the Internet.");

  script_tag(name:"solution", value:"Ensure all MS patches are applied as well as the latest AV
  definitions.");

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

  exit(0);
}

include("misc_func.inc");
include("host_details.inc");

if( get_kb_item( "fake_identd/113" ) ) exit( 0 );

port = 113;
if( ! get_port_state( port ) ) exit( 0 );
soc = open_sock_tcp( port );
if( ! soc ) exit( 0 );

req = string("GET\r\n");
send( socket:soc, data:req );
r = recv( socket:soc, length:16000 );
close( soc );

if( " : USERID : UNIX :" >< r ) {

  if( "GET : USERID : UNIX :" >< r ) exit( 99 );

  security_message( port:port );

  set_kb_item( name:"fake_identd/113", value:TRUE );
  exit( 0 );
}

exit( 99 );