September 2014 archive

Azure & Active Directory

  Azure is big. It’s really big. Seriously, it’s hard to comprehend just how big it really is. (Apologies to Douglas Adams.) In July of last year, then-CEO Steve Ballmer stated that Azure data centers held “comfortably over a million physical servers.” Last year, Azure server purchases accounted for 17% of all server purchases worldwide. …

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Disarming EMET 5

EMET version 5 has been out for only a few months and Offensive Security has identified bypass methods: INTRODUCTION In our previous Disarming Emet 4.x blog post, we demonstrated how to disarm the ROP mitigations introduced in EMET 4.x by abusing a global variable in the .data section located at a static offset. A general …

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PowerShell: ADSI and Case Sensitivity

In developing a custom PowerShell script which leveraged ADSI, I noticed that the script wasn’t working properly. Here’s a sample block of the script which uses ADSI to get changes made to ExtensionAttribute11 as part of an Active Directory Convergence test script: 1 2 3 4 $ADSITarget = [ADSI]”LDAP://$DC” $Searcher = New-Object DirectoryServices.DirectorySearcher($ADSITarget,”(sAMAccountName=$ConvergenceObject)”) $ConvergenceObjectData = …

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Powershell Remote Use of Module Commandlets (Remoting Import-Module)

Practically all of my Powershell scripts use an Active Directory commandlet. Ok, so they use several.  I like to query AD to get environmental information so when I run the script, I know what I am working with from an AD perspective. I can’t help it, I’m an AD Guy. In order to run the …

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PowerShell Code: Find Active Directory Site Containing AD Subnet

Here’s a quick script that returns the site in the Active Directory forest given a subnet (ex. Match-Subnet2Site.ps1   Param ( [string]$Subnet ) $IPSubnetRegEx = ‘\b((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0)\b’ # $IPRegEx = ‘\b((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\b’ IF ($Subnet -match $IPSubnetRegEx) { Write-Output “Searching the AD forest for subnet: $Subnet ” } ELSE { Write-Error “The provided subnet ($Subnet) is not …

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Azure Active Directory Stats

  Over 2.9 Million Organizations are using Azure Active Directory More than 10 Billion Authentications per week Azure Active Directory is spread out across 14 data centers Contains more than 240 million user accounts Organizations using Azure Active Directory across 127 countries Supports over 1400 integrated third-party apps Azure AD Statistics

LOL! Lingering Object Liquidator for Active Directory

Microsoft released the LOL GUI tool for removing Active Directory lingering objects. Historically, removing lingering objects from AD had been a painful process. Note that LOL is not a straightforward download. Follow the following steps to download: Log on to the Microsoft Connect site (using the Sign in) link with a Microsoft account:: Note: …

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PowerShell Code: Active Directory Domain Controller Discovery

There are several different ways to find AD Domain Controllers (DCs). Here are a few: AD PowerShell Module: Discover the closest Domain Controller running the AD web services (support PowerShell AD cmdlets): import-module activedirectory Get-ADDomainController -discover -forcediscover -nextclosestsite -service ADWS discover – find a DC forcediscover – re-discover a DC and not use a cached …

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Powershell Filter Operators

Once you get used to Powershell, you will want to do more and more with it.  One of the keys to leveraging the power of PowerShell is filters. PowerShell commandlets all support filters (well, most of them anyway).  This means you can drill down to resulting data subsets. If you run into commandlets that don’t …

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PowerShell: Parse a Large Multi-Line Text Field Based on String Value & Extract Text

Parsing a large multi-line text field (variable) for a specific string and extract text from it: $EventMessage = @” An account was successfully logged on. Subject: Security ID:  SYSTEM Account Name:  METCORPWKS201$ Account Domain:  METCORP Logon ID:  0x2b5 Logon Type:10 New Logon: Security ID:  METCORP\Administrator Account Name:  Administrator Account Domain:  METCORPWKS201 Logon ID:  0bc123d Logon …

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