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ACL

An access control list (ACL) is a list of access control entries (ACE). Each ACE specifies the access rights of a user or group.

The security descriptor for an object can contain two types of ACLs:

  • DACL - Defines the permission of a user or group have on object

  • SACL - Logs success and failure messages when an object is accessed.

Active Directory object permissions:

  • GenericAll - full rights to the object (add users to a group or reset user's password)

  • GenericWrite - update object's attributes (i.e logon script)

  • WriteOwner - change object owner to attacker controlled user take over the object

  • WriteDACL - modify object's ACEs and give attacker full control right over the object

  • AllExtendedRights - ability to add user to a group or reset password

  • ForceChangePassword - ability to change user's password

  • Self (Self-Membership) - ability to add yourself to a group

Get the ACLs associated with the specified object

Get-DomainObjectAcl -SamAccountName student1 -ResolveGUIDs

 Get-DomainObjectAcl -ResolveGUIDs -Identity "target" | ? {$_.SecurityIdentifier -eq (Convert-NameToSid foothold)}

Get the ACLs associated with the specified group

Get-DomainObjectAcl -SearchBase "LDAP://CN=Domain Admins,CN=Users,DC=dollarcorp,DC=moneycorp,DC=local" -ResolveGUIDs -Verbose

Get-DomainObjectAcl -Identity "Domain Admins" -ResolveGUIDs -Verbose

# Check replication permission
Get-DomainObjectAcl -SearchBase "DC=dollarcorp,DC=moneycorp,DC=local" -SearchScope Base -ResolveGUIDs | ?{($_.ObjectAceType -match 'replication-get') -or ($_.ActiveDirectoryRights -match 'GenericAll')} | ForEach-Object {$_ | Add-Member NoteProperty 'IdentityName' $(Convert-SidToName $_.SecurityIdentifier);$_}

Search for interesting ACEs

Find-InterestingDomainAcl -ResolveGUIDs | ?{$_.IdentityReferenceName -match "student1"}

Get the ACLs associated with the specified path

Get-PathAcl -Path "\\dcorp-dc.dollarcorp.moneycorp.local\sysvol"

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