AppRiver Blog

Necurs Botnet Launching Massive Ransomware Attacks

****Update: 12/29/2017 9 A.M.****

Necurs botnet operators continue to show unpredictability. Following the afternoon blog update yesterday they turned up the volume.  It ended up being our highest volume day of the year originating from the massive botnet.  We blocked 49,784,485 million ransomware messages destined to...

Read More

Malware Activity Heating Up

In September, the number of emails containing malware reached their highest levels thus far in 2017, as seen by our filters. So far, October is shaping up to continue that trend.

We have been monitoring this activity closely.

Read More

Locky Ransomware Attacks Ramp Up

***UPDATE*** In the past 24 hours we have seen over 23 million messages sent in this attack, making it one of the largest malware campaigns that we have seen in the latter half of 2017.

Malicious email campaign

As many US workers were arriving to their offices, a massive malicious email campaign began attempting to reach...

Read More

Locky Bringing the Malware Volume Back Up

Earlier this year, we had a lull in malware traffic for about three weeks after the Necurs botnet quite suddenly stopped sending out junk. History repeated itself on October 6th when we experienced another drop in malware traffic. Today, that dive in traffic might be over, ending this streak. The Locky malware has kicked...

Read More

Necurs Returning After a Short Vacation

Virus traffic has been huge so far in 2016. Mostly, this has been thanks to ransomware, and in particular, Locky distributed by the Necurs botnet. We've been seeing malware traffic counts in the tens of millions daily here for sometime now. This, of course, has its ups and downs, but for the past three weeks it's been...

Read More

JavaScript Malware with a Short Bio of Avira AntiVirus

This morning, AppRiver began filtering a malware campaign around 3AM and is still sending malware in bursts. The campaign is similar to ones we had seen yesterday about unpaid invoices.

Read More