Avanan Blog Blog


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What Are Botnets and How to Defend Against Them

In 2016, the infamous Mirai botnet briefly derailed the internet, shutting down Dyn servers responsible for internet traffic and much of the internet’s infrastructur...

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Prevent Phishing

Stop Phishing with Avanan's Anti-Phishing Software

In March of 2018, an employee at The Financial Services Information Sharing and Analysis center (FS-ISAC) clicked on a malicious link. From there, the phished email ...

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PhishPoint: New SharePoint Phishing Scam Affects an Estimated 10% of Office 365 Users

  Over the past two weeks, we detected (and blocked) a new SharePoint scam phishing attack that affected about 10% of Avanan's Office 365 customers. We estimate this...

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Fake Email Invoices: Why Office 365 Keeps Missing These Phishing Attacks?

Emails with fake invoices has been one of the most popular attack vectors against Office 365 email users for the past several years. The malicious emails are disguis...

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ACE Archives: Microsoft finally closes hole that allowed trojans to bypass Office 365 default security

For several weeks, we detected (and blocked) an attack targeting one of the largest municipalities in the U.S. that bypassed Office 365 default security, using a sim...

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Throwback Thursday: The DNC email hacks by Russian hacking firms

In 2016, we wrote a blog post and hosted a webinar summarizing the Russian hacks against the DNC. Two years later, Mueller's indictments have have both confirmed the...

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What is Shadow IT and Why Does it Exist?

Despite its menacing name, the practice of Shadow IT—when employees work with unsanctioned software, hardware, or applications on personal or company devices—is as r...

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4 Major Ways Phishing Attacks Have Evolved In The Last Ten Years

Ten years is an eternity when it comes to technology. Back in 2008, the Motorola Razor was the most popular cellphone on the market and Blu-Ray was set to be the fut...

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Phishing Training for Employees: Why Employee Training Can't Solve The Phishing Problem

Microsoft’s 2018 23rd Edition Security Intelligence Report is out, and it confirms the conclusion that most in the security industry already know: we can no longer r...

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ZeroFont Phishing: Manipulating Font Size to Get Past Office 365 Security

Recently, we have been seeing a number of phishing attacks using a simple strategy to get their blatant email spoofs past Microsoft's phishing scans. The tactic, whi...

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What makes a good CASB (Cloud Access Security Broker)?

What is a CASB? I am attending the Gartner Security and Risk Management Conference this week, and both analysts and customers are seeing a change in the cloud securi...

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baseStriker: Office 365 Security Fails To Secure 100 Million Email Users

Update: Microsoft has repaired this vulnerability on 5/16/18, two weeks after we first reported it to them. We recently uncovered what may be the largest security fl...

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The Cost of Ransomware Prevention vs Recovery in 2019

Like any business decision, handling ransomware needs to be approached with ROI in mind. Is it better to invest in ransomware-preventing technology, or is the risk s...

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Is Office 365 more secure without Proofpoint?

This week we saw a phishing attack at one of our customers that is using Proofpoint before their Office 365 email—a pretty basic phishing attack that bypassed both P...

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Office 365 Security: 8 Security Considerations When Moving to Office 365

So you’re considering a move to Office 365? Or, maybe you just moved? After you board up the server room and breathe a huge sigh of relief, it’s time to rethink what...

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