Anti-virus software (AV software) is a type of computer software that tries to identify malicious software and to prevent it from running. Since anti-virus software may wrongfully identify harmless files as malicious (false positives), AV software makes use of quarantining files. If a file is put into quarantine by an AV software, the AV software removes the original suspected malicious file and stores a modified obfuscated version in another location.
In this paper, the quarantine files of different AV software solutions were analyzed. The encryption and obfuscation methods were documented (including encryption keys) and parsers created using Kaitai Struct.
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The #TROOPERS25 ‘AD & Entra ID Security’ track was a blast – as was the whole conference 😉 – bringing together some of the smartest researchers in the field and a great audience of practitioners willing to share their experiences during the roundtable. The slides of the talks have been released in the interim on […]
The purpose of this blog post is to explain how Secure Boot works. In particular, we will explain where current implementations of Secure Boot by Linux distributors fall short compared to Microsoft Windows and Apple macOS. Major distributors like Canonical, Debian, openSUSE, and Red Hat place a high priority on making their operating systems work […]
In the last blog post, we discussed the full authentication flow using Windows Hello for Business (WHfB) with face recognition to authenticate against an Active Directory with Kerberos and showcased existing and new vulnerabilities. In this blog post, we dive into the architectural challenges WHfB faces and explore how we can exploit them.
Many Linux hardening guides focus on well-known protections: full-disk encryption, Secure Boot, and password-protected bootloaders. While these measures are critical, they often overlook a subtle but serious attack vector: the ability to drop into a debug shell via the Initial RAM Filesystem (initramfs). This oversight can enable an attacker with brief physical access to bypass […]
Important note: Some media coverage on this topic falsely or inaccurately depicts the attack conditions. To be clear: Any vulnerable device can be compromised if the attacker is in Bluetooth range. That is the only precondition. During our research on Bluetooth headphones and earbuds, we identified several vulnerabilities in devices that incorporate Airoha Systems on […]