arXiv subjects

Valérie Viet Triem Tong

Publications and source records attributed to Valérie Viet Triem Tong.

3 recordsLinked to original sources

arXiv2023

CVE representation to build attack positions graphs

In cybersecurity, CVEs (Common Vulnerabilities and Exposures) are publicly disclosed hardware or software vulnerabilities. These vulnerabilities are documented and listed in the NVD database maintained by the NIST. Knowledge of the CVEs impacting an information system provides a measure of its level of security. This article points out that these vulnerabilities should be described in greater detail to understand how they could be chained together in a complete attack scenario. This article presents the first proposal for the CAPG format, which is a method for representing a CVE vulnerability, a corresponding exploit, and associated attack positions.

cs.CR↗

arXiv2023

URSID: Using formalism to Refine attack Scenarios for vulnerable Infrastructure Deployment

In this paper we propose a novel way of deploying vulnerable architectures for defense and research purposes, which aims to generate deception platforms based on the formal description of a scenario. An attack scenario is described by an attack graph in which transitions are labeled by ATT&CK techniques or procedures. The state of the attacker is modeled as a set of secrets he acquires and a set of nodes he controls. Descriptions of a single scenario on a technical level can then be declined into several different scenarios on a procedural level, and each of these scenarios can be deployed into its own vulnerable architecture. To achieve this goal we introduce the notion of architecture constraints, as some procedures may only be exploited on system presenting special properties, such as having a specific operating system version. Finally, we present our deployment process for converting one of these scenarios into a vulnerable infrastructure, and offer an online proof of concept demonstration of our tool, where readers may deploy locally deploy a complete scenario inspired by the threat actor APT-29.

cs.CR↗

arXiv2020

Evasive Windows Malware: Impact on Antiviruses and Possible Countermeasures

The perpetual opposition between antiviruses and malware leads both parties to evolve continuously. On the one hand, antiviruses put in place solutions that are more and more sophisticated and propose more complex detection techniques in addition to the classic signature analysis. This sophistication leads antiviruses to leave more traces of their presence on the machine they protect. To remain undetected as long as possible, malware can avoid executing within such environments by hunting down the modifications left by the antiviruses. This paper aims at determining the possibilities for malware to detect the antiviruses and then evaluating the efficiency of these techniques on a panel of antiviruses that are the most used nowadays. We then collect samples showing this kind of behavior and propose to evaluate a countermeasure that creates false artifacts, thus forcing malware to evade.

cs.CR↗