It’s important to remember that email authors with malicious intentions are often clever. They continuously evolve their strategies to develop new ways of deceiving and attacking individuals and businesses alike. Although their strategies will vary, there are three basic approaches employed by most cybercriminals:
1. Links to malicious website pages:
These dangerous links are often featured directly in the body of the email. This type of threat accounts for a high number of data breaches, with Dark Reading summarizing the findings of a FireEye report that malicious URLs were even more common than email attachments in attacks, often using HTTPS links.
2. Transaction enticements:
This approach involves cybercriminals using social engineering to convince their victims to transmit sensitive information or perform a financial transaction. This approach does not require links or attachments.
3. Malicious attachments:
Cybercriminals will often send emails with malicious attachments. These attachments can install ransomware, keyloggers, and other malware on the victim’s device when opened.
These three strategies account for almost all forms of malicious emails employed by cybercriminals.
Top 4 email attachment threats
With malicious email attachments representing a lion’s share of successful malware deliveries, it’s important to examine the most common types of email attachment threats to understand how bad actors operate. Here are the top four email attachment threats that MSPs are likely to encounter.
Ransomware encrypts a victim’s data and demands or blackmails them into paying a fee to restore said data. Ransomware is delivered via email attachment and executed when the victim opens the attachment.
This tactic uses psychological and social manipulation to lure victims into divulging sensitive information that cybercriminals can then sell for malicious purposes. The message is designed to trick the recipient and the sender is designed to look authentic, making the victim believe that the email was sent by a trusted individual, or business. This baits them into opening infected attachments without thinking critically about what these attachments might include.
In severe data breaches, user credentials are almost always stolen. To pull this off, cybercriminals often use keyloggers to steal IDs and passwords. The keylogger can be stored in an email attachment and executed when opened, or when the victim clicks a malicious link. From there, the keylogger can record keys pressed on the user’s keyboard to capture passwords and other relevant account details.
4. Zero-day exploits
This type of attack targets zero-day vulnerabilities, which are security weaknesses unknown to the software developer. These are usually security vulnerabilities that are exploited before the vendor can fix them. Zero-day attacks are often delivered by email and are sometimes stored in attachments, giving hackers unauthorized access to sensitive information.
Choosing your MSP’s email security tools
It is key that you take email threat protection, email continuity, spam filtering, and practices for archiving into consideration when developing your email services for customers. SolarWinds® Mail Assure can help you address each of these email components while still helping ensure you’re enabling continued productivity and minimal downtime for your customers. To combat modern threats with ease, many MSPs depend on Mail Assure to protect both their customers and businesses from email-based attacks.
This tool delivers advanced spam protection with proprietary inbound filtering technology that incorporates data from more than 23 million mailboxes to safeguard against new threats. With a filtering accuracy rate of 99.999%, you can rest assured that your customers are able to conduct normal business via email without fear of malicious attachments.
Mail Assure also includes an easy-to-install Microsoft 365 add-in, which gives you seamless integration as well as offering users greater transparency and control over their email. Additionally, a new Sync for Microsoft 365 simplifies onboarding of your Microsoft 365 customers. If you are looking for protection against viruses, malware, spam, ransomware, phishing attacks, and other email-based threats, Mail Assure comes highly recommended. A 30-day free trial is available if you’re interested in learning more.