Erwin Bierens

Knowledge is Power

Error on installing Kali Tools in Ubuntu

2018-10-25 1 min read Linux Security Erwin Bierens

When you want to run a Raspberry Pi for pentesting, you can easily download all of the Kali linux to your Pi.

https://www.ostechnix.com/install-kali-linux-tools-using-katoolin-linux/

After changing the repository i ran in to a error.

While people on the forum ginving some different options, this one worked for me.

	`wget https://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2018.1_all.deb`

	`sudo apt install ./kali-archive-keyring_2018.1_all.deb`

Everything looks fine now. Let’s check for the final.

	`sudo apt-get update`

``

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How to install and upgrade Office Online Server to the latest version

Office Online Server (OOS) is the next generation of Office Web Apps Server (OWA), which allows organizations to deliver browser-based versions of Word, PowerPoint, Excel and OneNote, among other capabilities.

Most people who need to run Office Online Server are having Skype for Business Server 2015/2019 or SharePoint. Within Skype for Business it will be used for PowerPoint presentations inside meetings.

You can download Office Online Server from MSDN or Volume Licensing Center. The latest version listed over there is November 2017(en_office_online_server_last_updated_november_2017_x64_dvd_100181876.iso). In the meanwhile there have been made some patches available that are solving a lot of issues.

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My Favorites

2018-10-23 2 min read Lifehacking Erwin Bierens

My Tools

I was thinking of creating a top of favorite tools, services gadgets and apps i use on a daily/weekly base. So let’s make a start and i will try to update this page as often as possible.

Browser Plugins

  • Ghostery, If you don’t want to be followed by all the big million company’s turn this on in your browser.
  • uBlock, Turn of all those advertisers in your browser.

Apps

  • Feedly, the best RSS feed reader at this moment for me!
  • Visual Studio Code, is a code editor redefined and optimized for building and debugging modern web and cloud applications.
  • Wireshark, Capturing your packets was never this easy ;) (use my profiles to make life a bit easier)
  • LastPass, in 2018 it is impossible to not use a Password Manager. I’m using LastPass since 2011 and this is still the number one password manager for me.
  • OneNote, my notation app for everything i want to save!
  • Flow, Create and automate your workflows across multiple applications and services.
  • Notepad++, Opensource code editor
  • Openlive Writer, is a powerful, lightweight blog editor that allows you to create blog posts, add photos and videos then publish to your website.

Web Applications

  • Matomo, This is a opensource clone of Google Analytics, where you are in control.
  • Keybase, a crypto platform where you can manage your PGP keys and quickly produce encrypted messages.
  • ImgClean.io, Get all of the EXIF information out of your or someone elses pictures.
  • WayBackMachine, when you want to see how a website looked 10 years ago, use this timemachine :)

Services

  • Cryptomator & Stack 1TB of free storage in the ‘dutch’ cloud. Together with Cryptomator (opensource) you can encrypt your files with AES256 on the fly.

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How to create trusted network for MFA in Office365

2018-10-22 1 min read Office365 Security Erwin Bierens

What is MFA?

Multi-factor authentication (MFA) is a method of authentication that requires the use of more than one verification method and adds a second layer of security to user sign-ins and transactions. You can choose the following verification methods:

  • A randomly generated pass code (Microsoft Authenticator App or SMS)
  • A phone call
  • A smart card (virtual or physical)
  • A biometric device

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Enable MFA

When you don’t use MFA, but want to enable this. Follow this guide (Microsoft).

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Deploy error Skype for Business Cloud Connector - CredSSP

The problem

Last week i ran in to some errors while re-deploying a Cloud Connector, Changed some settings in the INI and while starting the redeploy gave me the following error:

	`Preparation phase started...
	The configuration file for Cms server setup is generated in C:\Users\Administrator\CloudConnector\ApplianceRoot\Instances\2.1.0\ExportedConfig\ServerConfig-Cms.ini.
	Preparation phase finished.
	Deployment phase started...
	Enabling credential delegation for NTLM on host machine.`
	`
	#text : false
	#text : true
	#text : true
	#text : false
	#text : true
	#text : Relaxed`


		[192.168.214.3] Connecting to remote server 192.168.214.3 failed with the following error message : The request is not supported. For more information, see the about_Remote_Troubleshooting Help topic.
		+ CategoryInfo          : OpenError: (192.168.214.3:String) [], PSRemotingTransportException
		+ FullyQualifiedErrorId : 50,PSSessionStateBroken
		[192.168.214.3] Connecting to remote server 192.168.214.3 failed with the following error message : The request is not supported. For more information, see the about_Remote_Troubleshooting Help topic.
		At C:\Program Files\WindowsPowerShell\Modules\CloudConnector\Internal\MtSetup.ps1:294 char:13
		+             Invoke-Command -ComputerName $machineIP -Credential $doma ...
		+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		+ CategoryInfo          : OpenError: (192.168.214.3:String) [], PSRemotingTransportException
		+ FullyQualifiedErrorId : 50,PSSessionStateBroken
		Trying to exit current manual maintenance mode.
		Successfully exit manual maintenance mode.
		[192.168.214.3] Connecting to remote server 192.168.214.3 failed with the following error message : The request is not supported. For more information, see the about_Remote_Troubleshooting Help topic.
		At C:\Program Files\WindowsPowerShell\Modules\CloudConnector\Internal\MtSetup.ps1:294 char:13
		+             Invoke-Command -ComputerName $machineIP -Credential $doma ...
		+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		+ CategoryInfo          : OpenError: (192.168.214.3:String) [], PSRemotingTransportException
		+ FullyQualifiedErrorId : 50,PSSessionStateBroken`

After some diging in to this problem i found some people having same issues with other Microsoft products. Last March Microsoft released the CredSSP update and this prevented connecting to vulnerable systems using older authentication methods.

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Be more productive with some new features in Teams

2018-09-24 1 min read Microsoft Teams Erwin Bierens

With the first day of Ignite we already have some new feature announcements for Microsoft Teams

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  • Background blur: In Teams users can blur the background so focus on what matters most.
  • Meeting recording: Meetings are no longer just a point in time experience. With meeting recording in Teams, you or other invitees who missed the meeting can playback recorded audio, video and content at any time. Pull up a transcript, powered by Microsoft Stream, and search for keywords so you can optimize your time while getting caught up.
  • Cloud video interop – Bring your existing room technology investments into Teams. Through partner offerings from Polycom, BlueJeans and Pexip, a full portfolio of legacy devices can now be full-fledged audio/video participants in Teams meetings with content sharing. Polycom’s CVI offering is available now, with Pexip and BlueJeans generally available by end of October.
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