Smart Home Devices: assets or liabilities? – Part 2: Privacy

TL;DR - Part two of this trilogy of blog posts will tackle the next big topic when it comes to smart home devices: privacy. Are these devices doubling as the ultimate data collection tool, and are we unwittingly providing the manufacturers with all of our private data? Find out in this blog post! This blog … Continue reading Smart Home Devices: assets or liabilities? – Part 2: Privacy →

Proxying Android app traffic – Common issues / checklist

During a mobile assessment, there will typically be two sub-assessments: The mobile frontend, and the backend API. In order to examine the security of the API, you will either need extensive documentation such as Swagger or Postman files, or you can let the mobile application generate all the traffic for you and simply intercept and … Continue reading Proxying Android app traffic – Common issues / checklist →

NVISO and QuoIntelligence Announce Strategic Cooperation

We are pleased to announce that we have created a unique approach with QuoIntelligence GmbH in responding to the TIBER-EU testing. Using our approach, we combine both passive threat intelligence gathering and active offensive red team testing as one seamless experience while remaining independent from each other.   The TIBER-EU Framework, More Critical Now Than Ever  … Continue reading NVISO and QuoIntelligence Announce Strategic Cooperation →

MITRE ATT&CK turned purple – Part 1: Hijack execution flow

The MITRE ATT&CK framework is probably the most well-known framework in terms of adversary emulation and by extent, red teaming.It features numerous TTPs (Tactics, Techniques, and Procedures) and maps them to threat actors. Being familiar with this framework is not only benefiting the red team operations but the blue team operations as well! To create … Continue reading MITRE ATT&CK turned purple – Part 1: Hijack execution flow →

Sentinel Query: Detect ZeroLogon (CVE-2020-1472)

In August 2020 Microsoft patched the ZeroLogon vulnerability CVE-2020-1472. In summary, this vulnerability would allow an attacker with a foothold in your network to become a domain admin in a few clicks. The attacker only needs to establish a network connection towards the domain controller. At NVISO we are supporting multiple clients with our MDR … Continue reading Sentinel Query: Detect ZeroLogon (CVE-2020-1472) →

Smart Home Devices: assets or liabilities? – Part 1: Security

This blog post is part of a series, keep an eye out for the following parts! TL;DR - Smart home devices are everywhere, so I tested the base security measures implemented on fifteen devices on the European market. In this blog post, I share my experience throughout these assessments and my conclusions on the overall … Continue reading Smart Home Devices: assets or liabilities? – Part 1: Security →

Epic Manchego – atypical maldoc delivery brings flurry of infostealers

In July 2020, NVISO detected a set of malicious Excel documents, also known as “maldocs”, that deliver malware through VBA-activated spreadsheets. While the malicious VBA code and the dropped payloads were something we had seen before, it was the specific way in which the Excel documents themselves were created that caught our attention. The creators … Continue reading Epic Manchego – atypical maldoc delivery brings flurry of infostealers →

Detecting the sudden appearance of events with ee-outliers and Elasticsearch

Recently, for our open-sourced ee-outliers framework, we released a new outlier model capable of detecting the sudden appearance of one or multiple field values of an Elasticsearch event. For example, this model could spot new TLDs that are suddenly being contacted (DNS/SSL) and communicating with C2 domains. It could also detect an executable that suddenly … Continue reading Detecting the sudden appearance of events with ee-outliers and Elasticsearch →