Quarkslab Internship Offers for 2019-2020

It's time to open Quarkslab internships season! This year, we offer 5 new internships, most of which are linked to binary analysis related research topics but have a look, there is more! Quarkslab team is always pleased to welcome new talents who want to work on complex security research subjects. If you love binaries, want to face new challenges and work in a dynamic environment where curiosity and teamwork are at the heart of our way to do R&D, please apply!

All internships will take place in our main office in Paris, France (and one in Rennes also). If you are coming from abroad, you will need a proper visa to be with us. At Quarkslab, we encourage remote work, but that does not apply to internships.

Last but not least, we usually train Padawans so that they stay with us once their training period is done, even if that does not mean the training is over :)

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Exploring Execution Trace Analysis

Off-line dynamic trace analysis offers a number of advantages, which are illustrated in this blog post through several examples using internal tools we specially developed to automate trace collection and analysis.

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An Experimental Study of Different Binary Exporters

This blog post presents a comparison between various disassembled binary exporters.

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Epona and the Obfuscation Paradox: Transparent for Users, a Pain for Reversers

This blog post demonstrates through an example how the Epona obfuscating compiler, from the Epona Application Protection Suite, achieves the challenge of facilitating the everyday experience of its users while enabling better obfuscation schemes trade-offs.

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QBDI 0.7.0

This blog post introduces the release of QBDI v0.7.0 as well as an Android use case.

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Weisfeiler-Lehman Graph Kernel for Binary Function Analysis

In this blogpost, we present a general method to efficiently compare functions from a new binary against a large database (made of numerous known functions). This method has strong theoretical properties and is perfectly suited to address many conventional problems, such as classification, clustering or near duplicate detection.

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Obfuscating Java bytecode with LLVM and Epona

In this article I describe my two-months summer internship project at Quarkslab: obfuscating Java bytecode using the [Epona] Code Obfuscator. This article explains our approach, its advantages and limitations.

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Security Audit of dalek libraries

The Tari Labs mandated Quarkslab to perform a cryptographic and security assessment of the dalek libraries. One of the Tari Labs' projects is to implement the Tari protocol, a decentralised assets protocol. It relies on some of the dalek libraries, especially the cryptographic primitives, provided by subtle and curve25519-dalek. Moreover, the use of Bulletproofs , and its implementation by the authors of the dalek libraries, will allow them to enable efficient confidential transactions on the blockchain in a near future.

We only found some minor issues. We also provided recommendations on the usage of the libraries and third-party libraries.

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Security Audit of Monero RandomX

Quarkslab's team performed a cryptographic and security assessment of the Monero Research Lab’s new Proof-of-Work algorithm, called RandomX . RandomX is a proof-of-work algorithm that is optimized for general-purpose CPUs. RandomX uses random code execution together with several memory-hard techniques to minimize the efficiency advantage of specialized hardware. We only found minor inconsistencies and formulated a few recommendations. These recommendations are mainly relevant when using alternative configurations but they are of less importance with the current configuration and usage of RandomX. The full report of the assessment can be found at the following address:

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CVE-2018-6924: FreeBSD ELF Header Parsing Kernel Memory Disclosure

On September 2018, FreeBSD published the security advisory FreeBSD-SA-18:12, fixing a kernel memory disclosure vulnerability affecting all the supported versions of this operating system.

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