AppRiver Blog

Recent Posts by David Pickett

Phishing Threatens Deadly Viruses

A new phishing campaign caught our attention recently due to the unique wording and varying tactics it uses in this "Security Alert." It threatens that the recipient's mailbox is infected with 3 deadly viruses and will shutdown if the warning is ignored.

Let's take a quick look at this credential-harvesting attack.

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Email Bombs Disguise Fraud - Distributed Spam Distraction

Email Bombs Continue to Disguise Fraud

Email bombs are a type of Denial of Service (DoS) attack. Victims face an uncontrollable deluge of messages quickly filling up their inbox when the attack begins. With enough volume, the attack renders the victims mailbox useless. Victims struggle to make sense why a sudden...

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Sextortion vs Bombtortion Hoaxes

Sextortion vs Bombtortion

On Dec. 13, bomb-threat hoaxes via email sparked law enforcement agencies around the world to chase down nonexistent devices. Many researchers and media outlets were quick in observing the similarity the bomb threats shared with sextortion campaignsWhile the sextortion threats have been going...

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New Sextortion Campaign - Caught you cheating!

Today's Sextortion Message - Caught Cheating

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SPISHING Attacks: Phishing Emails That Talk

A New Twist

As a company who protects 60,000+ businesses worldwide, AppRiver's Security Team has no shortage of phishing emails to continuously defend against. While analyzing samples for new techniques and tactics we ran across one that was a familiar phishing scam with a surprising, but amusing twist.

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THREAT ALERT: Cybercrooks Abusing Microsoft Azure Storage Custom Domain Name Feature

THREAT ALERT: Cybercrooks Abusing Azure Custom Domain Name Feature

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TrickBot Campaign Spoofs Dun & Bradstreet

Trickbot Spoofs Dun & Bradstreet

On Wednesday, Sept. 4, in just under an hour's time AppRiver's SecureTide malware engine stopped 103,791 malicious Word documents destined to clients. The campaign was designed to drop the Trickbot Trojan onto an unsuspecting users system. This particular attack spoofed the data and...

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BEC Attacks Evolving - Phishing via XPS Files

We've seen it time after time, malicious actors routinely attempt to confuse recipients of messages with obscure or lesser-utilized file extensions.

Over the past month, some phishing attempts using xps files instead of the typical pdf or doc/docx formats have been captured by our filters.  The xps file format is...

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Office 365 Business Email Compromise Attacks Proliferate

Office 365 Business Email Compromise Attacks

The Office 365 (O365) platform has experienced tremendous growth and there is no sign of that trend slowing.  More businesses than ever reside with - or plan to migrate accounts to - the expanding Microsoft Business or Enterprise services. Scammers have taken notice and have...

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Warning! Trojan Droppers Exploiting Symbolic Link (.SLK) Files

Trojan Droppers Exploiting Symbolic Link Files

Malicious actors routinely attempt to confuse recipients of messages with obscure file extensions to load malicious files on the victims machine.

For most users the .slk file is recognized in Microsoft Office software as an Excel file. However, as detailed here, it also is...

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