Microsoft Windows: Turn on PowerShell Script Block Logging

# Copyright (C) 2019 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.109909");
  script_version("2022-08-31T10:10:28+0000");
  script_tag(name:"last_modification", value:"2022-08-31 10:10:28 +0000 (Wed, 31 Aug 2022)");
  script_tag(name:"creation_date", value:"2019-07-01 09:36:48 +0000 (Mon, 01 Jul 2019)");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:H/Au:S/C:N/I:N/A:N");
  script_tag(name:"qod", value:"97");

  script_name("Microsoft Windows: Turn on PowerShell Script Block Logging");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Policy");
  script_dependencies("compliance_tests.nasl", "smb_reg_service_pack.nasl");
  script_mandatory_keys("Compliance/Launch");

  script_add_preference(name:"Value", type:"radio", value:"0;1", id:1);

  script_xref(name:"URL", value:"https://www.microsoft.com/en-us/download/confirmation.aspx?id=25250");

  script_tag(name:"summary", value:"This policy setting enables logging of all PowerShell script
input to the Microsoft-Windows-PowerShell/Operational event log. If you enable this policy setting,
Windows PowerShell will log the processing of commands, script blocks, functions, and scripts -
whether invoked interactively, or through automation.

If you disable this policy setting, logging of PowerShell script input is disabled.

If you enable the Script Block Invocation Logging, PowerShell additionally logs events when
invocation of a command, script block, function, or script starts or stops. Enabling Invocation
Logging generates a high volume of event logs.

(C) Microsoft Corporation 2015.");
  exit(0);
}

include("smb_nt.inc");
include("policy_functions.inc");
include("version_func.inc");

target_os = "Microsoft Windows 8.1 or later";
win_min_ver = "6.3";
title = "Turn on PowerShell Script Block Logging";
solution = "Set following UI path accordingly: Windows Components/Windows PowerShell/" + title;
test_type = "RegKey";
type = "HKLM";
key = "Software\Policies\Microsoft\Windows\PowerShell\ScriptBlockLogging";
item = "EnableScriptBlockInvocationLogging";
reg_path = type + "\" + key + "!" + item;
default = script_get_preference("Value");

if(!policy_verify_win_ver(min_ver:win_min_ver))
  results = policy_report_wrong_os(target_os:target_os);
else
  results = policy_match_exact_reg_dword(key:key, item:item, type:type, default:default);

value = results["value"];
comment = results["comment"];
compliant = results["compliant"];

policy_reporting(result:value, default:default, compliant:compliant, fixtext:solution,
  type:test_type, test:reg_path, info:comment);
policy_set_kbs(type:test_type, cmd:reg_path, default:default, solution:solution, title:title,
  value:value, compliant:compliant);

exit(0);