MGraph suddenly stops working
PS C:\Windows> Get-MGUser -All Get-MGUser : InteractiveBrowserCredential authentication failed: In Zeile:1 Zeichen:1 + Get-MGUser -All + ~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [Get-MgUser_List], AuthenticationFailedException + FullyQualifiedErrorId : Microsoft.Graph.PowerShell.Cmdlets.GetMgUser_List Prior to this I did a "connect-mgraph -Scopes "User.Read.All" " and authenticated myself with MFA. Did not get an error doing so. Logged in as a global administrator. Any ideas what i going wrong? I know, the error indicates Authentication Failure, but Authentication looks correct
Purview -> Powershell
i need to export some users their data before their licenses are removed. It is about 60 users, so i would rather user powershell instead of the purview portal to automate the job. So i have been playing around with the commandlets, to get an idea to build the script. The strange thing is what i see in Powershell is not represented in the Purview portal. We had an older compliance case which was no longer used. I tried to remove the compliance case by the Purview portal, but nothing happens when clicking "delete case" or "close case". i then reverted back to PowerShell by using the Remove-ComplianceCase "$CaseName", where the compliance case was successfully removed. When running the Get-ComplianceCase, i can see that the old compliance case is indeed removed, however the removed compliance case is still present in the Purview portal even several hours after deleting the case with PowerShell. Then started to play around with a new compliance search New-ComplianceSearch -Name "$($TargetMailbox.displayName) License Cleanup" -ExchangeLocation "$($TargetMailbox.PrimarySmtpAddress)" -Case "License Cleanup" -SharePointlocation "$($PNPPersonalSite.url)" after refreshing a couple of times i could see the compliance search in the purview portal. Then started the compliance search by using the Start-ComplianceSeacrh commandlet and verified that the search status was completed: Get-compliancesearch "$($TargetMailbox.displayName) License Cleanup" | select status However in the Purview portal no statistics were shown (not available yet). Didn't spend to much attention as i already saw discrepancies between the purview portal and what i saw in Powershell, so continued exporting compliance search with a compliance search action to export the data in the process manager New-ComplianceSearchAction -SearchName ""$($TargetMailbox.displayName)" -Export Can successfully retrieve the compliancesearch action in Powershell and can see that the status is completed, but fail to retrieve the export in the purview portal. Get-ComplianceSearchAction -case "License CleanUp" -includecredential | fl Did not achieve a way in downloading the export results via PowerShell, but would already be pretty pleased if i could achieve the first two steps via PowerShell. But as i am unable to retrieve the export in the Purview portal, i am afraid that i am still stuck. I can create an export in the Purview portal from the compliance search i created in Powershell. Can anyone please explain me the issue with the discrepancies between what i see in PowerShell and the Purview Portal and is it possible to see the exports created in powershell in the purview portal? And is it feasible to download the export from Powershell as well (Start-Process)?
Change work hours
Hello, I am trying to change users' work hours as I would do via the web interface. However, I am unable to find a way to do this using PowerShell. I’ve seen suggestions to use Set-MailboxCalendarConfiguration, such as: Set-MailboxCalendarConfiguration -Identity email address removed for privacy reasons -WorkingHoursStartTime "09:00:00" -WorkingHoursEndTime "17:00:00" However, I need to set different working hours for each day, and I can’t find any parameters that would allow me to do this. Is this possible? Do I need to use Update-MgUserMailboxSetting for this? Thank you, Alejandro
A powershell 7 script that will grant a global admin rights to users OneDrive
Hello, I'm wondering if this has ever been done, and if yes, can someone either give me the script or point me to where it is. I have a CSV of users which I need to grant a global admin access to their One Drives. I've scoured the internet for scripts that will iterate through my CSV and grant me access but I am always getting errors no matter what I try to do. I am using PS7 for this. Has this ever been done? If yes can someone please give me a script that can do it. Thanks
Adding External Users in-bulk to: Microsoft Teams & Private Channel(s) within the Team
We have a customer who requires over 350 external users (their customers) to be added / invited into a Team which has been created. "Half" of the users need to be added into "private channel a", and the other "Half" need to be added into "private channel b". We have attempted to add the users via various PowerShell scripts, however none of these scripts that we have been provided with have worked for various reasons. I have been unable to locate any native methods for this within the MS 365 admin centre, therefore believe that the only way to achieve this is by PowerShell scripting. Example of the most recent script we have is as follows, omitting the creation of the private channel(s) as they have already been created - see below: We require assistance with the actual script itself to: Add users into the team from a CSV of their email addresses. Assign the users to the correct private channel. Note - users will be added in 2 batches - 1 per private channel, so we just require scripting that can be modified to achieve this. # Install the Microsoft Teams PowerShell Module Install-Module -Name PowerShellGet -Force -AllowClobber Install-Module -Name MicrosoftTeams -Force -AllowClobber # Connect to Microsoft Teams Connect-MicrosoftTeams # Define the team name and path to the CSV file $teamName = "Your Team Name" $csvPath = "C:\path\to\your\users.csv" # Get the GroupId of the team $team = Get-Team -DisplayName $teamName $groupId = $team.GroupId # Import users from the CSV file $users = Import-Csv $csvPath # Add external users to the team foreach ($user in $users) { Add-TeamUser -GroupId $groupId -User $user.Email } # Define the private channel name $privateChannelName = "Private Channel Name" # Create the private channel New-TeamChannel -GroupId $groupId -DisplayName $privateChannelName -MembershipType Private # Get the ChannelId of the private channel $channel = Get-TeamChannel -GroupId $groupId -DisplayName $privateChannelName $channelId = $channel.Id # Add users to the private channel foreach ($user in $users) { Add-TeamChannelUser -GroupId $groupId -User $user.Email -ChannelId $channelId }
Microsoft Graph Sign in Log Script
Hi all, I'm trying to create a script that will check sign ins based on the location. How ever the location always appears as 'Microsoft.Graph.PowerShell.Models.MicrosoftGraphSignInLocation'. I am able to see the location if I select the property 'location' by itself and expand the property, but then that only show's a list of the locations. If I add other properties, it either doesn't work or it displays like this: I tried exporting as a csv and the location column values showed up as 'Microsoft.Graph.PowerShell.Models.MicrosoftGraphSignInLocation'. This is what I have currently: Get-MgAuditLogSignIn -Filter "location/countryOrRegion eq 'AU'" -Top 10 | format-list And if I try selecting properties (I would add more properties later, this is just an example: $properties = 'location, userprincipalname' Get-MgAuditLogSignIn -All -Filter "location/countryOrRegion eq 'AU'" -Top 10 -Property $properties | Select -ExpandProperty $properties Has anyone tried something similar?Threat Hunting with PowerShell - Security even with a small budget - there is no excuse!
Dear Threat Hunter, Lack of IT security is often excused by little or no available money. In my view, this is a very poor excuse. In this article I will try to give you a jump start on how to investigate threats with PowerShell. Is this a comprehensive and conclusive list of how you can find or detect threats/threats? NO, absolutely not. But it is meant to provide you with the support that you need to move forward on your own. Let's talk about the "general conditions": 1. If you use the PowerShell scripts I show/explain in this article, this is entirely your responsibility. I use the scripts in different situations, they are not dangerous, but you should already know what you are doing. 2. Written permission! If you are not sure if you are allowed to do an investigation, organize a written permission from your supervisor. 3. In the different scripts I sometimes (for this article deliberately) use standard search words like "malware", "malicious", "hacker" etc. Such search patterns/search words need to be customized, of course. These simply serve as an example. 4. The last part of the article examines some Microsoft cloud services. I am absolutely aware that there are a huge number of tools for hunting in the Microsoft cloud services. It starts with Azure Sentinel and continues with Cloud App Security. Since the focus is on a small budget, I'll leave those tools on the side. Introduction: So first, why should you use PowerShell for threat hunting? PowerShell is a useful threat hunting tool because it is a powerful scripting language and a platform for automating tools and accessing data across any Windows environment. It allows you to quickly gather information from various sources such as event logs, registries, files, and processes. Additionally, it can also be easily integrated with other tools and technologies making it a flexible and efficient tool for threat hunting. Some common use cases for PowerShell in the threat hunting environment include automated collection of log data, identification of unusual behavior anomalies in the system, the discovery of malware or malicious activity by known signatures or patterns or behaviors. These are just a few examples of how PowerShell can be used in a threat hunting capacity. Its versatility and ability to access and manipulate data from across the Windows environment make it a very valuable tool for any security professional. Threat Hunting in PowerShell - Use Cases: All right. So now that we understand where PowerShell can benefit an organization from a threat hunting perspective. Let's take a deeper look at some of the actual use cases you might encounter on a day to day basis, first being identify malicious processor files. So specifically, you can conduct raw file analysis to sift through different data shares to look for particular files in question whether that be a signature or even an extension of a certain file being able to quickly search and triage through files is an extreme benefit of using PowerShell for threat hunting. But how exactly do we start, what can we use as a guide? For example, the MITRE ATT&CK Framework. Here are a few examples: Indicator Removal: Clear Windows Event Logs https://attack.mitre.org/techniques/T1070/001/ Event Triggered Execution: Installer Packages https://attack.mitre.org/techniques/T1546/016/ Hide Artifacts: NTFS File Attributes https://attack.mitre.org/techniques/T1564/004/ Command and Scripting Interpreter: PowerShell https://attack.mitre.org/techniques/T1059/001/ Command and Scripting Interpreter: Windows Command Shell https://attack.mitre.org/techniques/T1059/003/ Event Triggered Execution: Windows Management Instrumentation Event Subscription https://attack.mitre.org/techniques/T1546/003/ Credentials from Password Stores: Windows Credential Manager https://attack.mitre.org/techniques/T1555/004/ Abuse Elevation Control Mechanism: Bypass User Account Control https://attack.mitre.org/techniques/T1548/002/ The MITRE ATT@CK framework provides a comprehensive and regularly updated overview of tactics, techniques, and procedures (TTPs) used by various threat actors. We can locate these TTPs using PowerShell, here are a few examples: Indicator Removal: Clear Windows Event Logs https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/06_Account_Events.ps1 Event Triggered Execution: Installer Packages https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/08_Get-ItemProperty_Software.ps1 Hide Artifacts: NTFS File Attributes https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/08_Get-ItemProperty_Software.ps1 Windows Installer Service is running https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/01_WIS_is_running.ps1 Search Alternate Data Streams on NTFS File Systems https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/02_Search_ADS_on_NTFS%20_(specific%20file).ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/03_Search_ADS_on_NTFS_file_systems.ps1 Read the Contents of a File https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/06_Read_the_contents_file.ps1 Locating Data Patterns within a File https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/05_locating_data_patterns_within_file.ps1 Search for Encoding with Regex https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/07_Search_encoding_with_regex.ps1 Search for Command and Scripting Interpreter: https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Tactics_Techniques_Procedures_(TTPs)/04_Searching_for_PIDs.ps1 Threat hunting in different environments with PowerShell: Coming examples are about collecting information in very different environments. Also here a few examples as a kind => as first starting points: Hunt for Threats in Active Directory: https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/01_Resetting_Password_Unlocking_Accounts.ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/02_Search_stale_accounts.ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/03_Users_without_Manager.ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/04_Password_Expiration.ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/05_Group_Membership_Report.ps1 https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Active_Directory/06_Account_Events.ps1 https://github.com/tomwechsler/Active_Directory_Advanced_Threat_Hunting/blob/main/PowerShell/Tracking_the_Source_of_Account_Lock_Outs_and_Bad_Passwords.ps1 https://github.com/tomwechsler/Active_Directory_Advanced_Threat_Hunting/blob/main/PowerShell/Finding_Unused_Group_Policy_Objects.ps1 Some of the scripts are structured in such a way that they must be executed block by block/line by line. So do not execute the whole script at once. Pay attention to the different information that is collected. With some investigations in the Active Directory accounts can be indicated like "guest" or "krbtgt", there must be clear of course how this information is to be estimated. Depending on how and what information is searched. Hunt for Threats in Exchange Online: https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Exchange_Online/Exchange_Mailbox_LastLogin.ps1 Find mailboxes with the last login. Hunt for Threats in Azure: https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Azure/Collect_vms_subscription.ps1 We search Azure for all virtual machines in a subscription. https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_Azure/02_Graph_Create_Time_Last_Password.ps1 When was the last password change and when were the accounts created? Hunt for Threats in SharePoint: https://github.com/tomwechsler/Threat_Hunting_with_PowerShell/blob/main/Hunting_SharePoint_Online/SharePoint_Online_specific_files.ps1 With this script we search for files with the extension .ps1 in a SharePoint Online page. Summary: Is this the best tactic to hunt for threats? No! There are many different tactics/techniques to search for threats. First of all, there are a huge number of different tools that can be used, for example SIEM/SOAR (Security Information and Event Management/Security Orchestration, Automation and Response). These tools are really great, sometimes cost a lot and often it takes a lot of knowledge to use such tools. But what is the use of such tools if the information generated by these tools cannot be understood properly, not very much. For this reason, I have tried in this article with simple tools to generate information that hopefully can be interpreted. Is finished here at this point. NO, the journey continues. The examples in this article are neither exhaustive nor complete, but they should give you a starting point. I hope you can build on this foundation. I hope that this information is helpful to you and that you have received a good "little" foundation. But I still hope that this information is helpful for you. Thank you for taking the time to read the article. Happy Hunting, Tom Wechsler P.S. All scripts (#PowerShell, Azure CLI, #Terraform, #ARM) that I use can be found on github! https://github.com/tomwechslerGenerate vCard for each user in Exchange online and attach to user's mail.
We are looking best method to create vCard for each user in Exchange online and attach vCard in user's outlook for outgoing email. Is there any script or tool to programmatically create a vCard, that can generate .vcf files with the desired contact information for each user and integrate to Exchange online to apply to corresponding user.
