Since WannaCry and Petya ransomware were spreading through Windows systems in 2017, it’s recommended to have Server Message Block (SMB) version 1 disabled in Windows clients and Windows Server. Now SMBv1 is not installed by default in Windows 10 1709 and Windows Server, version 1709 and later, but how can you be sure it is disabled in older versions of Windows? Easy: PowerShell.(more…)
Apache Access Control done right, ‘Allow/Deny from all’ versus ‘Require All Granted/Denied’
Since Apache 2.4.6, a new module is used to configure and set up access control for websites: mod_authz_core. This means you have to use a different syntax for allowing or blocking hosts and IP addresses to your website. But unfortunately, old documentation is never updated and people even still write blog posts using that old syntax, leaving you with an unprotected website. Not what you had in mind, now is it?…(more…)
Ryan McFarland writes on his blog:
“Privilege escalation always comes down to proper enumeration. But to accomplish proper enumeration you need to know what to check and look for. This takes familiarity with systems that normally comes along with experience. At first privilege escalation can seem like a daunting task, but after a while you start to filter through what is normal and what isn’t. It eventually becomes easier to know what to look for rather than digging through everything hoping to find that needle in the haystack. Hopefully this guide will provide a good foundation to build upon and get you started.”
There are a lot of hints & tips out there for troubleshooting SPNs, or Service Principal Names. Listing duplicate SPNs is fairly easy, just use
setspn -X on your command-line and you’ll find out. But how do you find out which SPNs are used for which users and computers are used for this?
Acunetix 11 Review by Help Net Security. Acunetix is one of the biggest players in the web security arena. The European-based company released the first version of their product back in 2005, and thousands of clients around the globe use it to analyze the security of their web applications. They recently unveiled Acunetix version 11, so Help Net Security decided to take it for a spin.
Windows Server security: When you have just installed your new Windows Server, with or without IIS as web server, it is important to take a few extra security measurements. Securing your (web) server is important to keep hackers out and your data safe. Here are some steps you can take to secure and harden your Windows Server (IIS) web or file server.(more…)
Disable SMBv1 to prevent prevent Petya / NotPetya, WannaCry / WanaCrypt0r ransomware spreading through your network. These worm viruses exploit a vulnerability in Windows Server Message Block (SMB) version 1 (SMBv1), and spread like wildfire. It is urged you disable SMBv1 in your Windows variant (Windows 10, 8.1, Server 2016, 2012 R2), and here is how if you haven’t done so yet.(more…)
Microsoft Security Advisory 4021279: Microsoft is releasing this security advisory to provide information about vulnerabilities in public .NET Core and ASP.NET Core. This advisory also provides guidance on what developers can do to update their applications correctly.
Andrew Douma, a vendor-neutral consultant, writes in Penetration Testers’ Guide to Windows 10 Privacy & Security:
Verify WordPress Core files md5 checksums against WordPress’ checksums API, using this standalone PHP file. I chose to use a standalone PHP script to check the md5sum of WordPress Core files against the API so you’re not dependent on a possibly hacked WordPress installation. This kind of guarantees the result can be trusted, as opposed to using a WordPress plugin. I think this is a better integrity check of WordPress Core files.(more…)
Found via cyber-ir.com: This paper is the best I have ever read on how to build IOC’s with Windows Event ID’s. I highly recommend you to read it, it contains very useful information and some very interesting behavioural examples of attacker activity. If you are looking to enhance your detection in your core network this is the document!
Over the course of one week I had the opportunity to audit two hacked WordPress websites. I could quickly discover two vulnerabilities: a Cross Site Scripting, or XSS, in a premium WordPress theme Akal, and a Denial-of-Service in an undisclosed newsletter plugin. This post describes the Akal premium WordPress theme XSS vulnerability.(more…)