Sony DRM Rootkit

I’ve been getting a lot of questions in the last week about Microsoft’s position on the Sony DRM and rootkit discussions, so I thought I’d share a little info on what we’re doing here. We are concerned about any malware and its impact on our customers’ machines. Rootkits have a clearly negative impact on not…

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What’s in a name?? A lot!! Announcing Windows Defender!

Every week seems like a big week for us in the engineering team working on our anti-malware technology. However, last week was especially important in a sentimental way. We got the final name for the cool technology our team has been developing for Windows. The name, after long consideration by our product marketing and branding…

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Windows Defender Beta 2: Update

Hi all, We’ve gotten some great feedback from places like this blog and our support newsgroups about the recently released Windows Defender Beta 2. We really appreciate the enthusiastic participation! Some of this feedback has allowed us to identify a couple of problems with our setup on non-English versions of Windows:  We have a problem…

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Final release of Windows Defender (Build 1592)

It brings me great pleasure to announce the final availability of Windows Defender in English. The team has been working hard for over a year and fixed over 400 bugs in the areas of stability and reliability since Windows Defender (Beta 2). We plan to release localized versions in the next few months including but…

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Windows Defender Beta 2 Refresh

Today, we released a refresh of Windows Defender (Beta 2) which includes updates based on the customer feedback that we have received through this blog and the newsgroups. This update also addresses some issues that have been brought to our attention around signature updating, improves upon the usability of Windows Defender and also improves our SpyNet…

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Announcing Windows Defender Beta 2

Hi, I’m Adam Overton, the group program manager for the anti-malware technology team. I’m very excited to be blogging today about the availability of Windows Defender Beta 2 which was announced by Bill Gates at his RSA conference keynote earlier this morning. You can download the new beta version from the Microsoft Download Center. Users…

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Antimalware Team Releases MSRT White Paper

Hello there. I’m writing to you from the Microsoft TechEd conference in Boston. This event attracts over 10,000 attendees interested in learning about current and future Microsoft products. It’s also a great place for getting feedback from our customers and we’ll share some of that feedback next week. Yesterday, the Microsoft Antimalware team released a…

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Storm Drain

Over the past few months, there has been talk about a wave of malware known commonly as “Storm”.  “Storm” has been noted to be responsible for Distributed Denial of Service (DDoS) attacks, mass phishing emails, spam, botnets, and all sorts of online malicious activity.   While the name “Storm” was adopted by press, security companies…

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VirusTotal Participation

Hi, this is Ziv Mador again from the Microsoft Anti-Malware team. This week, the folks over at VirusTotal added the Microsoft anti-malware engine to their service. VirusTotal is a free service that enables users to submit suspicious files to be scanned by several anti-malware engines. If you choose, files that are not identified as malicious are…

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Sony rootkit signatures now available

Hi, we are Eric Allred and Ziv Mador, response coordinators for the anti-malware technology team. We have analyzed several versions of the rootkit that have been shipped as part of Sony’s XCP software. We are calling the family WinNT/F4IRootkit.  We chose the name based on the company that authored this component. We have added detection…

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