A colleague of our German office got in touch with me to help with the interpretation of the hexadecimal output data of the UserAssist Nessus Plugin. That was an interesting request: I did not know Nessus came with such a plugin, although I'm very familiar with the UserAssist registry keys. The UserAssist registry keys register … Continue reading Nessus’ UserAssist Plugin
In a previous post we introduced the field of adversarial machine learning and what it could mean for bringing AI systems into the real world. Now, we'll dig a little deeper into the concept of adversarial examples and how they work.For the purpose of illustrating adversarial examples, we’ll talk about them in the context of … Continue reading This is not a hot dog: an intuitive view on attacking machine learning models
Yes, getting staff attention for security awareness is hard. It's not that users don’t care. But everybody is fighting for their attention. And after all, the company is investing big money on security measures, so they're probably safe anyhow. Way too often, for each handful of truly enthusiastic users I find, there's also a large community … Continue reading Users ignore your security awareness program? Ditch it!
A common principle in cybersecurity is to never trust external inputs. It’s the cornerstone of most hacking techniques, as carelessly handled external inputs always introduce the possibility of exploitation. This is equally true for APIs, mobile applications and web applications.
It’s also true for deep neural networks.
Today, we are announcing the retirement of NVISO ApkScan, our online malware scanning service we launched back in 2013. ApkScan was born with the purpose of offering the (security) community a free, reliable and quality service to statically and dynamically scan Android applications for malware. Since the inception of the project, it has been a … Continue reading Sunsetting NVISO ApkScan
In this third blog post in a series about Azure Security Logging, we will focus on collecting security logs from Windows and Linux virtual machines. In part 1 we discussed how to define a security logging strategy in Azure. Part 2 went into detail about logging in some of the key Azure services. In this … Continue reading Azure Security Logging – part 3: security-logging capabilities of Azure virtual machines
Introduction This week, we received a suspicious spreadsheet which was used as a malware dropper in a phishing campaign. The spreadsheet writes a DLL file to disk and subsequently executes it. In this blog post, we perform the full analysis of the suspicious spreadsheet. Analyzing the document The analysis of this Excel file starts with … Continue reading Analyzing a Malicious Spreadsheet Dropping a DLL