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Bringing you news and commentary on solutions and strategies for protecting critical IT infrastructure in the context of your business.

Batchwiper: How I Learned to Worry Less and Love Least Privilege Security

Posted December 19, 2012    BeyondTrust Research Team

With news coming from Iran’s CERT of a nasty (but not really nasty) new piece of malware designed to wipe drives and desktop contents on a specific date, we took the straightforward approach of examining what common, easily implemented security best practices could have stopped Batchwiper in its tracks…

As far as malware goes, Batchwiper is very rudimentary in its execution and capabilities, yet it still has the capacity to cause damage – so how might someone defend themselves from Batchwiper? Simple: run with least privileges. Running as non-administrator effectively neutralizes the dropper component of Batchwiper, specifically GrooveMonitor.exe (MD5 – f3dd76477e16e26571f8c64a7fd4a97b). The dropper is a self-extracting archive, which attempts to put files in the \WINDOWS\system32\ folder. If you’re running as non-admin, the dropper has no permissions to write to that location and the malware will simply fail to execute its intended payloads.

Batchwiper stymied by least privilege.

Least privilege defeats Batchwiper dropper.

If you are unfortunate enough to have a corporate IT environment that does not properly manage Administrative privileges, then the dropper will continue to execute by spawning a series of processes. This eventually leads to Batchwiper formatting drives D through I, performing a Disk Check on each drive (possibly to mask the cause of the data loss), and then deleting the current user profile’s desktop contents.

Batchwiper process list.

Batchwiper processes spawned by dropper.

This malware serves as another example in a long line of threats that are, in most cases, completely (if not severely) mitigated by good security configuration best practices such as practicing Least Privilege.

BeyondTrust has been at the forefront of championing the cause of Least Privilege for quite some time through our BeyondTrust PowerBroker solutions for both Windows and Unix/Linux. Customers leveraging BeyondTrust’s PowerBroker for Windows will mitigate a large majority of malware that affects companies on a day-to-day basis, including this recent Batchwiper malware. You can find out more about our Least Privilege solutions here: http://www.beyondtrust.com/Products/PowerBrokerForWindows/

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Stopping the Skeleton Key Trojan

Posted June 29, 2015    Robert Auch

Earlier this year Dell’s SecureWorks published an analysis of a malware they named “Skeleton Key”. This malware bypasses authentication for Active Directory users who have single-factor (password only) authentication. The “Skeleton Key” attack as documented by the SecureWorks CTU relies on several critical parts.

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On Demand Webinar: 10 Steps to Building an Effective Vulnerability Management Program

Posted June 26, 2015    BeyondTrust Software

In this on demand webinar, Cybersecurity Expert, Derek A.Smith will take you through his 10 steps for a successful vulnerability management program and how to get started now.

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Privileged Account Management – Another AH-HA in Cyber Security

Posted June 25, 2015    Nigel Hedges

I strongly believe that the Top 4 mitigation strategies don’t just simply apply to Australian organizations, it should be a global realization, a worldwide “ah ha!” for those still not quite understanding the importance here. Here’s a refresher (or intro) on the Top 4 mitigation strategies. Read on…

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