There's a new malware attack that uses voicemail to infect victims. Can you explain how this attack works? How...
can enterprises detect and defend against this voicemail-leveraging malware?
Very few exploits outside of social engineering have been delivered via plain-old-telephone service, but modern criminals have found a way to trick people through a new voicemail phishing scam. The modern twist is that the voicemail is delivered as an attachment on an email. For this to work, the attacker sends a phishing email designed to look like a legitimate email notifying the recipient he has a voicemail; the fake voicemail notification email carries a malicious attachment and when the recipient opens the voicemail file, the malware executes on the endpoint.
Enterprises can detect and defend against voicemail-leveraging malware by using an antispam or antiphishing scam tool that monitors for malicious emails. Alternatively, they could use a network based antimalware tool that blocks either a potential download of the malware, or the command and control communications.
Enterprises should also train their users to be more judicious about opening any attachments that look legitimate. Multifunction printers, fax machines, voicemail and other systems that send notifications via email should be configured with relevant details and branding for the enterprise to help employees identify phishing scams. A targeted attack could spoof the proper configuration and branding, but it increases the resources needed for the attack. In their security awareness training, enterprises should include that users should be skeptical of attachments that seem out of context from the sender.
These same defenses can be used against phishing scams disguised as a scanned document, fax or many other types of email notifications, including gift card notifications.
Ask the Expert:
Have a question about enterprise threats? Send it via email today. (All questions are anonymous.)
Find out which antimalware products are best for your organization
Learn how to identify a phishing attack
Check out the three reasons why phishing is so popular
Dig Deeper on Malware, virus, Trojan and spyware protection and removal
Related Q&A from Nick Lewis
A security researcher found a security flaw dubbed CVE-2018-2636 that enables the installation of malware on Oracle Micros POS systems. Learn more ... Continue Reading
The joint DHS and NIST report on botnet security offers goals and action items to counter distributed cyberthreats. Learn the report recommendations ... Continue Reading
Android malware was discovered by Kaspersky Labs and named Skygofree. This Trojan targets smartphones and tablets using spyware and gathers user ... Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.