Mark Russinovich
CTO, Deputy CISO, and Technical Fellow for Microsoft Azure; creator of Sysinternals
- Chief Technology Officer, Deputy Chief Information Security Officer, and Technical Fellow, Microsoft Azure, Microsoft12
Mark Russinovich is CTO, Deputy CISO, and Technical Fellow for Microsoft Azure. In a 2025 Microsoft Security blog profile, Russinovich describes a team focused on technical strategy, architecture, and security risk management for the Azure platform, engineering systems, and core operating systems. Russinovich created the Sysinternals web site in 1996 to host advanced system utilities; Microsoft Learn now hosts the Sysinternals tools for troubleshooting Windows and Linux systems. Russinovich is first author of the Crescendo paper on multi-turn jailbreak attacks against language models, accepted at USENIX Security 2025, and co-authored "Who's Harry Potter?" with Ronen Eldan on approximate unlearning in language models.12345
Work
Crescendo multi-turn jailbreak attack (external site: arxiv.org)Published research
First author of "Great, Now Write an Article About That: The Crescendo Multi-Turn LLM Jailbreak Attack" (2024, accepted at USENIX Security 2025), which introduces a multi-turn jailbreak that starts with seemingly benign interactions.4
Who's Harry Potter? Approximate Unlearning in LLMs (external site: arxiv.org)Published research
Co-author with Ronen Eldan of a 2023 paper proposing a technique for unlearning a subset of a language model's training data without retraining from scratch, demonstrated on Llama2-7b.5
Sysinternals (external site: learn.microsoft.com)
Created the Sysinternals web site in 1996 to host advanced system utilities and technical information; Microsoft Learn now hosts the utilities for managing, troubleshooting, and diagnosing Windows and Linux systems and applications.3
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