July 2023: The Technical Landscape of Ransomware: Threat Models and Defense Models
Ransomware has become a global problem. Given the reality that ransomware will eventually strike your system, we focus on recovery and not on prevention. The assumption is that the attacker did enter the system and rendered it inoperative to some extent.
We start by presenting the broad landscape of how ransomware can affect a computer system, suggesting how the IT manager, system designer, and operator might prepare to recover from such an attack.
We show the ways in which ransomware can (and sometimes cannot) attack each component of the systems. For each attack scenario, we describe how the system might be subverted, the ransom act, the impact on operations, difficulty of accomplishing the attack, the cost to recover, the ease of detection of the attack, and frequency in which the attack is found in the wild (if at all). We also describe strategies that could be used to recover from these attacks.
Some of the ransomware scenarios that we describe reflect attacks that are common and well understood. Many of these scenarios have active attacks in the wild. Other scenarios are less common and do not appear to have any active attacks. In many ways, these less common scenarios are the most interesting ones as they pose an opportunity to build defenses ahead of attacks.
The Ransomware Report they discussed during the presentation is here:
https://doi.org/10.5281/zenodo.8140464
And, the latest version of our Guide to Securing Scientific Software, is here:
https://doi.org/10.5281/zenodo.8137009
Speaker Bios:
Barton Miller is the Vilas Distinguished Achievement Professor and the Amar & Belinder Sohi Professor in Computer Sciences at the University of Wisconsin-Madison. He is a co-PI on the Trusted CI NSF Cybersecurity Center of Excellence, where he leads the software assurance effort and leads the Paradyn Tools project, which is investigating performance and instrumentation technologies for parallel and distributed applications and systems. His research interests include software security, in-depth vulnerability assessment, binary and malicious code analysis and instrumentation, extreme scale systems, and parallel and distributed program measurement and debugging. In 1988, Miller founded the field of Fuzz random software testing, which is the foundation of many security and software engineering disciplines. In 1992, Miller (working with his thenstudent Prof. Jeffrey Hollingsworth) founded the field of dynamic binary code instrumentation and coined the term “dynamic instrumentation”. Miller is a Fellow of the ACM and recent recipient of the Jean Claude Laprie Award for dependable computing.
Miller was the chair of the Institute for Defense Analysis Center for Computing Sciences Program Review Committee, member of the U.S. National Nuclear Safety Administration Los Alamos and Lawrence Livermore National Labs Cyber Security Review Committee (POFMR), member of the Los Alamos National Laboratory Computing, Communications and Networking Division Review Committee, and has been on the U.S. Secret Service Electronic Crimes Task Force (Chicago Area).
Elisa Heymann is a Senior Scientist on TrustedCI, the NSF Cybersecurity Center of Excellence at the University of Wisconsin-Madison, and an Associate Professor at the Autonomous University of Barcelona. She co-directs the MIST software vulnerability assessment at the Autonomous University of Barcelona, Spain.
She coordinates in-depth vulnerability assessments for NFS Trusted CI, and was also in charge of the Grid/Cloud security group at the UAB, and participated in two major Grid European Projects: EGI-InSPIRE and European Middleware Initiative (EMI). Heymann's research interests include software security and resource management for Grid and Cloud environments. Her research is supported by the NSF, Spanish government, the European Commission, and NATO.