AD Enumeration Without External Scripts

While doing red teaming many a time we encounter implimentation of internal VDI with no internet excess to external network and due to which we are not able to download our powershell scripts in compromised system to enumerate AD and its users.

In most of the red team courses , they encourage to teach students to use readymade PowerShell scripts to enumerate AD environment like powerview.ps1 and which is very suitable and non-complex way of doing things. But what if this suitable way becomes un-suitable for us and we are not allowed to download PowerShell scripts or download any other tool from internet in compromised system ?

The scripts like Powerview.ps1 uses funtions to make things simple. But there are some one liners which can do the same thing in case powerview is not available.

In this blog, we will be studing about those one liners which can help us to enumerate AD.

Domain Enumeration

The below code will show the current domain name:

PS C:> [System.Net.Dns]::GetHostByName(($env:computerName))
PS C:> [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()

Domain Forest Trusts

PS C:> ([System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()).GetAllTrustRelationships()
PS C:> ([System.DirectoryServices.ActiveDirectory.Forest]::GetCurrentForest())
PS C:> ([ADSISearcher]"(objectClass=trustedDomain)").FindAll()
PS C:> ([ADSISearcher]"(objectClass=trustedDomain)").FindAll() | %{$a=$_.Properties["trustattributes"]; $d=$_.Properties["trustdirection"]; $t=$_.Properties["trusttype"] ; write-Host $_.Properties["distinguishedname"] $a $d $t}

Get Password Policy

PS C:> Get-ADDefaultDomainPasswordPolicy -Current LoggedOnUser

Get a Domain Computer

PS C:> ([ADSISearcher]"(&(objectClass=computer)(name=Man*))").FindAll()

In the above one liner we searched for a computer name starting with “Man”. Similarly we can enumerate a specific computer if we we know the whole name.

PS C:> ([ADSISearcher]"(&(objectClass=computer)(name=Manmeet))").FindAll()

Here, we fetched computer “Manmeet” ‘s details.’

Get All Domain Computers

PS C:> ([ADSISearcher]"ObjectClass=computer").FindAll()

Enumerate Single User

If we want to enumerate single user, we can use below code:

PS C:> ([ADSISearcher]"(&(objectClass=user)(samAccountType=805306368)(samaccountname=manmeet))").FindAll().Properties

This will fetch user “manmeet” details

Enumerate All Domain Controllers

PS C:> ([ADSISearcher]"(&(objectCategory=computer)(userAccountControl:1.2.840.113556.1.4.803:=8192))").FindAll()

Enumerate All Users

If we want to enumerate all users, we can use below code:

PS C:> ([ADSISearcher]"(&(objectClass=user (samAccountType=805306368))").FindAll()|ft

Enumerate All Users With Specific Properties

There could be many properties that a user could have. If we want to filter out some properties in all users, we can use below code:

PS C:> ([ADSISearcher]"(&(objectClass=user)(samAccountType=805306368))").FindAll() | %{ $_.Properties["samaccountname"] }

This code will just display “samaccountname” as a result for all users.

Enumerate all users with a SPN

A service instance’s service principal name (SPN) is a unique identifier. Kerberos authentication uses SPNs to link a service instance to a service login account. This enables a client application to ask the service to authenticate an account even if it doesn’t know the account name.
If we want to display all users with SPN then we can use below code:

PS C:> ([ADSISearcher]"(&(objectClass=user)(servicePrincipalName=*)(samAccountType=805306368))").FindAll()

Enumerate a Domain Group

PS C:> ([ADSISearcher]"(&(ObjectClass=group)(samaccountname=Domain Admins))").FindOne()

Enumerate All Domain Groups

PS C:> ([ADSISearcher]"ObjectClass=group").FindAll()

Enumerate domain group members

PS C:> ([ADSISearcher]"(distinguishedname=CN=AB ACCESS,CN=Users,DC=corp,DC=manmeetdc,DC=local)").FindOne().Properties.member

Using these one liners we can do same things that powerview.ps1 is doing.

Reference

• https://www.g0dmode.biz/active-directory-enumeration/
• https://docs.microsoft.com/en-us/windows/win32/ad/service-principal-names
• https://github.com/PowerShellMafia/PowerSploit/blob/master/Recon/PowerView.ps1

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