Windows 10 Creators Update provides next-gen ransomware protection

Multiple high-profile incidents have demonstrated that ransomware can have catastrophic effects on all of us. From personally losing access to your own digital property, to being impacted because critical infrastructure or health care services are unexpectedly unavailable for extended periods of time, destructive attacks have grown in severity and scale on all platforms – including…


World Backup Day is as good as any to back up your data

In today’s security landscape, there are more threats to data than ever before. Beyond corruption caused by hardware or human failure, malware and cyberattacks can put data in serious danger.  That’s why it’s imperative for enterprises, small-and-medium businesses, and individuals to back up data. It must be implemented systematically, not just on World Backup Day…

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Ransomware operators are hiding malware deeper in installer packages

We are seeing a wave of new NSIS installers used in ransomware campaigns. These new installers pack significant updates, indicating a collective move by attackers to once again dodge AV detection by changing the way they package malicious code. These changes are observed in installers that drop ransomware like Cerber, Locky, and others. Cybercriminals have…

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Ransomware: A declining nuisance or an evolving menace?

The volume of ransomware encounters is on a downward trend. Are we seeing the beginning of the end of this vicious threat? Unfortunately, a look at the attack vectors, the number of unique families released into the wild, and the improvements in malware code reveals otherwise. Ransomware was arguably the biggest security story of 2016….

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Improved scripts in .lnk files now deliver Kovter in addition to Locky

Cybercriminals are using a combination of improved script and well-maintained download sites to attempt installing Locky and Kovter on more computers. A few months ago, we reported an email campaign distributing .lnk files with a malicious script that delivered Locky ransomware. Opening the malicious .lnk files executed a PowerShell script that performed a download routine. More…

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Don’t let this Black Friday/Cyber Monday spam deliver Locky ransomware to you

We see it every year: social engineering attacks that take advantage of the online shopping activities around Black Friday and Cyber Monday, targeting customers of online retailers. This year, we’re seeing a spam campaign that Amazon customers need to be wary of. The fake emails pretend to be notifications from the online retailer that a purchase has…

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MSRT July 2016 – Cerber ransomware

As part of our ongoing effort to provide better malware protection, the July 2016 release of the Microsoft Malicious Software Removal Tool (MSRT) includes detection for Win32/Cerber, a prevalent ransomware family. The inclusion in MSRT complements our Cerber-specific family detections in Windows Defender, and our ransomware-dedicated cloud protection features. We started seeing Cerber in February…

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Malicious macro using a sneaky new trick

We recently came across a file (ORDER-549-6303896-2172940.docm, SHA1: 952d788f0759835553708dbe323fd08b5a33ec66) containing a VBA project that scripts a malicious macro (SHA1: 73c4c3869304a10ec598a50791b7de1e7da58f36). We added it under the detection TrojanDownloader:O97M/Donoff – a large family of Office-targeting macro-based malware that has been active for several years (see our blog category on macro-based malware for more blogs). However, there wasn’t…

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Large Kovter digitally-signed malvertising campaign and MSRT cleanup release

Kovter is a malware family that is well known for being tricky to detect and remove because of its file-less design after infection. Users from United States are nearly exclusively being targeted, and infected PCs are used to perform click-fraud and install additional malware on your machine. Starting April 21, 2016, we observed a large…

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