Detecting DNS implants: Old kitten, new tricks – A Saitama Case Study 

Max Groot & Ruud van Luijk TL;DR A recently uncovered malware sample dubbed ‘Saitama’ was uncovered by security firm Malwarebytes in a weaponized document, possibly targeted towards the Jordan government. This Saitama implant uses DNS as its sole Command and Control channel and utilizes long sleep times and (sub)domain randomization to evade detection. As no … Continue reading Detecting DNS implants: Old kitten, new tricks – A Saitama Case Study 

Implementing the Castryck-Decru SIDH Key Recovery Attack in SageMath

Introduction Last weekend (July 30th) a truly incredible piece of mathematical/cryptanalysis research was put onto eprint. Wouter Castryck and Thomas Decru of KU Leuven published a paper "An efficient key recovery attack on SIDH (preliminary version)" describing a new attack on the Supersingular Isogeny Diffie-Hellman (SIDH) protocol together with a corresponding proof-of-concept implementation. SIDH is … Continue reading Implementing the Castryck-Decru SIDH Key Recovery Attack in SageMath

Technical Advisory – Multiple vulnerabilities in Nuki smart locks (CVE-2022-32509, CVE-2022-32504, CVE-2022-32502, CVE-2022-32507, CVE-2022-32503, CVE-2022-32510, CVE-2022-32506, CVE-2022-32508, CVE-2022-32505)

The following vulnerabilities were found as part of a research project looking at the state of security of the different Nuki (smart lock) products. The main goal was to look for vulnerabilities which could affect to the availability, integrity or confidentiality of the different devices, from hardware to software. Eleven vulnerabilities were discovered. Below are … Continue reading Technical Advisory – Multiple vulnerabilities in Nuki smart locks (CVE-2022-32509, CVE-2022-32504, CVE-2022-32502, CVE-2022-32507, CVE-2022-32503, CVE-2022-32510, CVE-2022-32506, CVE-2022-32508, CVE-2022-32505)

Five Essential Machine Learning Security Papers

We recently published "Practical Attacks on Machine Learning Systems", which has a very large references section - possibly too large - so we've boiled down the list to five papers that are absolutely essential in this area. If you're beginning your journey in ML security, and have the very basics down, these papers are a … Continue reading Five Essential Machine Learning Security Papers

Whitepaper – Practical Attacks on Machine Learning Systems

This paper collects a set of notes and research projects conducted by NCC Group on the topic of the security of Machine Learning (ML) systems. The objective is to provide some industry perspective to the academic community, while collating helpful references for security practitioners, to enable more effective security auditing and security-focused code review of ML systems. Details of specific practical attacks and common security problems are described. Some general background information on the broader subject of ML is also included, mostly for context, to ensure that explanations of attack scenarios are clear, and some notes on frameworks and development processes are provided.

Flubot: the evolution of a notorious Android Banking Malware

Originally published June 29, 2022 on the Fox-IT blog Authored by Alberto Segura (main author) and Rolf Govers (co-author) Summary Flubot is an Android based malware that has been distributed in the past 1.5 years inEurope, Asia and Oceania affecting thousands of devices of mostly unsuspecting victims.Like the majority of Android banking malware, Flubot abuses … Continue reading Flubot: the evolution of a notorious Android Banking Malware

Technical Advisory – ExpressLRS vulnerabilities allow for hijack of control link

Vendor: ExpressLRS Vendor URL: https://expresslrs.org Versions affected: 1.x, 2.x Author: Richard Appleby Severity: Medium 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Summary ExpressLRS is a high-performance open source radio control link. It aims to provide a low latency radio control link while also achieving maximum range. It runs on a wide variety of hardware in both 900 Mhz and 2.4 … Continue reading Technical Advisory – ExpressLRS vulnerabilities allow for hijack of control link

Understanding the Impact of Ransomware on Patient Outcomes – Do We Know Enough?

The healthcare sector and ransomware attacks appear together frequently in the media. Since before the start of the pandemic rarely a week goes by without at least one story about a healthcare organisation falling victim to a ransomware attack. We often hear about the financial impact these attacks have or how they can affect patient safety, but … Continue reading Understanding the Impact of Ransomware on Patient Outcomes – Do We Know Enough?

Exception Handling and Data Integrity in Salesforce

Robust exception handling is one of the tenets of best practice for development, no matter what the coding language. This blog post explores the curious circumstances in which a developer trying to do the right thing - but without appreciating the full effects - could lead to data integrity issues in a Salesforce Organization. As … Continue reading Exception Handling and Data Integrity in Salesforce

Technical Advisory – Multiple Vulnerabilities in Trendnet TEW-831DR WiFi Router (CVE-2022-30325, CVE-2022-30326, CVE-2022-30327, CVE-2022-30328, CVE-2022-30329)

The Trendnet TEW-831DR WiFi Router was found to have multiple vulnerabilities exposing the owners of the router to potential intrusion of their local WiFi network and possible takeover of the device. Five vulnerabilities were discovered. Below are links to the associated technical advisories: Technical Advisory: Stored XSS in Web Interface for Trendnet TEW-831DR WiFi router … Continue reading Technical Advisory – Multiple Vulnerabilities in Trendnet TEW-831DR WiFi Router (CVE-2022-30325, CVE-2022-30326, CVE-2022-30327, CVE-2022-30328, CVE-2022-30329)