Leandro Costantino

Leandro Costantino is a seasoned software architect in the Office of the CTO at McAfee where he is researching and applying cutting edge technology to the future of security. Leandro has more than 17 years of experience in product development, research and innovation spanning Endpoint to Cloud technologies. In his free time, Leandro manages personal open source projects, plays with his baby "the storm" Giovanni, and takes care of his pet gang (4 poodles, 6 cats).

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McAfee Labs

Knock, Knock – Who’s There?

A Windows Linux Subsystem Interop Analysis Following our research from Evil Twins and Windows Linux Subsystem, interoperability between different WSL versions was something that caught our attention. The protocol and mechanism to do file management from/to WSL is a must for Blue and Red Teams whose research will provide new ...

McAfee Labs

The Twin Journey, Part 3: I’m Not a Twin, Can’t You See my Whitespace at the End?

In this series of 3 blogs (you can find part 1 here, and part 2 here), so far we have understood the implications of promoting files to “Evil Twins” where they can be created and remain in the system as different entities once case sensitiveness is enabled, and some issues ...

McAfee Labs

The Twin Journey, Part 2: Evil Twins in a Case In-sensitive Land

In the first of this 3-part blog series, we covered the implications of promoting files to “Evil Twins” where they can be created and remain in the system as different entities once case sensitiveness is enabled. In this 2nd post we try to abuse applications that do not work well ...

McAfee Labs

The Twin Journey, Part 1

Summary and Introduction: The recent changes in Windows 10, aiming to add case sensitivity (CS) at directory level, have prompted our curiosity to investigate the potential to use CS as a mean of obfuscation or WYSINWYG (What You See is NOT What you Get). While CS was our entry point, ...

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