Entries by Jan Reilink

How to disable SMBv1 in Windows 10 and Windows Server

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 […]

Check WordPress Core files integrity

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 […]

The WinCache effect: Save with object caching

WinCache, or Windows Cache Extension for PHP, is a PHP accelerator that is used to significantly increase the speed of PHP applications running on Windows Server IIS. Besides increasing the speed of PHP applications, WinCache decreases CPU usage making it a win win situation extension.

Intrusion Detection with Windows Event ID’s

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 […]

Tips to speed up WordPress, serve gzip compressed static HTML files

Who said WordPress is slow on Windows Server IIS? Gzip compress and serve WP-Super-Cache or Cache Enabler static HTML files, to supercharge your WordPress blog. Here is how to serve gzip compressed HTML files through Windows Server IIS: create smaller, compressed, static HTML files, that are downloaded faster. This works with WP-Super-Cache and Cache Enabler […]

Optimize(d) WordPress hosting (9+ practical tips)

Optimized WordPress hosting is a subject on which a lot is written about. And therefore, this post is not about where to host your WordPress blog, or who offers the best WordPress hosting. This post is for you developers, what you can do to optimize your WordPress hosting. Or for any other PHP web application […]

WordPress advisory: Akal premium theme XSS vulnerability

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.