Economic Factors of Vulnerability Trade and Exploitation

TL;DR

This paper empirically analyzes the underground cybercrime market for exploits, revealing pricing dynamics, market expansion, and the correlation between market activity and exploit deployment, providing insights into the economics driving cyberattack proliferation.

Contribution

It offers the first quantitative analysis of the economics of vulnerability exploits in cybercrime markets, based on first-hand data from a Russian marketplace.

Findings

Exploits are priced similarly or higher than legitimate bug bounties.

The refresh cycle of exploits is slower than previously assumed.

Market activity strongly correlates with exploit deployment.

Abstract

Cybercrime markets support the development and diffusion of new attack technologies, vulnerability exploits, and malware. Whereas the revenue streams of cyber attackers have been studied multiple times in the literature, no quantitative account currently exists on the economics of attack acquisition and deployment. Yet, this understanding is critical to characterize the production of (traded) exploits, the economy that drives it, and its effects on the overall attack scenario. In this paper we provide an empirical investigation of the economics of vulnerability exploitation, and the effects of market factors on likelihood of exploit. Our data is collected first-handedly from a prominent Russian cybercrime market where the trading of the most active attack tools reported by the security industry happens. Our findings reveal that exploits in the underground are priced similarly or above vulnerabilities in legitimate bug-hunting programs, and that the refresh cycle of exploits is slower than currently often assumed. On the other hand, cybercriminals are becoming faster at introducing selected vulnerabilities, and the market is in clear expansion both in terms of players, traded exploits, and exploit pricing. We then evaluate the effects of these market variables on likelihood of attack realization, and find strong evidence of the correlation between market activity and exploit deployment. We discuss implications on vulnerability metrics, economics, and exploit measurement.