Floor purple 1 FINAL

Abnormal Stops the Most Sophisticated Lateral Phishing Email Attacks

See how the Abnormal platform has improved the effectiveness of lateral attack detection and how it stops the most advanced attacks.

One of Abnormal’s primary goals is to provide the maximum level of precision detection in order to prevent never-seen-before threats. This includes text-only payloadless attacks like social engineering attempts and account takeovers. Abnormal accomplishes this without requiring clients to manage and maintain a plethora of rules, unlike traditional secure email gateways (SEGs).

Announcing Increased Lateral Email Attack Detection Efficacy

We are constantly improving our differentiated technology and superior efficacy when it comes to stopping email attacks. As a result, we have created and trained a new machine learning model that quickly eliminates identified false negatives, particularly for payloadless attacks like advanced socially-engineered emails to extract personally identifiable information (PII) of the victim.

The Abnormal detection engineering team has been busy at work, further enhancing our detection precision by decreasing our false-negative rate for lateral email attacks by a staggering 27.2%.

Lateral Attack Scenario

You might be wondering: what exactly is a lateral attack? Well, it’s defined as attacks sent from a compromised user to another internal employee with malicious intent. Lateral attacks are exceptionally challenging for traditional SEGs to detect as they usually have little to no visibility into internal email traffic.

A lateral attack consists of two components. The lure is the first and most crucial component, as the attacker must persuade the victim to take some action. This is accomplished by impersonating someone that the user will most likely trust.

The exploit is the second component. The victim is enticed to perform an action, such as opening an attachment with a malicious payload or visiting a URL that tricks the user into providing their valid network credentials.

Abnormal detecting a lateral phishing attack from a compromised internal email account

Image: Compromised internal account attempting to perform a lateral phishing attack.

In this example, Abnormal’s explainable from within the admin console explains why we detected and blocked this attack.

Once the attacker gains access to a corporate network, they will use various tools and techniques that elevate their privileges to achieve their objectives. For example, some will exfiltrate sensitive information to either sell to the highest bidder or put up for ransom. In other cases, the bad actor will deploy ransomware across the environment and demand a payment to access your information and bring your critical business systems back online.

Abnormal’s Innovative Solution to Stopping Lateral Attacks

Abnormal engineering determined that a heuristics rules-based approach is not overly effective at detecting lateral email attacks, given there are too many permutations. Instead, the engineering team took the following approach:

  1. The engineering team did a deep dive into lateral attacks that identified clear attack trends within the data and retrained the detectors while directly addressing the attacker’s strategy. One notable example is students at educational institutions being targeted with fake job offers, enticing them to provide personally identifiable information or account credentials.

  2. The analysis also surfaced sender-based behaviors like deviations in normal communication frequency and content that are strong signals of lateral phishing behavior. We have built a new feature-engineering platform that enables us to craft these new signals to adapt to bad actors' ever-changing tactics.

  3. Retraining our detectors with the new signals to more effectively identify anomalous behavior in internal email communications has led to detection gains in lateral phishing and other aspects of the product, such as vendor fraud detection.

The net result is that the detection improvements effectively address the lateral attack strategies we have previously seen, and can accurately and automatically identify novel lateral phishing attacks that evade traditional email solutions. This allows us to provide our customers with the most effective email protection.

Abnormal is devoted to rapidly innovating to improve our detection capabilities, built-in automation, and processes to assist security teams in staying one step ahead of attackers. Updates to our revised algorithm prioritize key advancements, particularly those connected to detection enhancements, and provide a better overall experience for our consumers. At Abnormal, we stop the attacks that matter the most.

Want to learn more about how our advanced algorithms stop advanced attacks? Request a demo today.


Prevent the Attacks That Matter Most

Get the Latest Email Security Insights

Subscribe to our newsletter to receive updates on the latest attacks and new trends in the email threat landscape.

Demo 2x 1

See the Abnormal Solution to the Email Security Problem

Protect your organization from the attacks that matter most with Abnormal Integrated Cloud Email Security.

Related Posts

B 10 3 22 Cobalt Terrapin Blog
Threat group Cobalt Terrapin uses sophisticated impersonation techniques with multiple steps to commit invoice fraud.
Read More
B 09 29 22 CISO Cybersecurity Awareness Month
October is here, which means Cybersecurity Awareness Month is officially in full swing! These five tips can help security leaders take full advantage of the month.
Read More
B Email Security Challenges Blog 09 26 22
Understanding common email security challenges caused by your legacy technology will help you determine the best solution to improve your security posture.
Read More
B 5 Crucial Tips
Retailers are a popular target for threat actors due to their wealth of customer data and availability of funds. Here are 5 cybersecurity tips to help retailers reduce their risk of attack.
Read More
B 3 Essential Elements
Legacy approaches to managing unwanted mail are neither practical nor scalable. Learn the 3 essential elements of modern, effective graymail management.
Read More
B Back to School
Discover how threat group Chiffon Herring leverages impersonation and spoofed email addresses to divert paychecks to mule accounts.
Read More
B 09 06 22 Rearchitecting a System Blog
We recently shared a look at how the Abnormal engineering team overhauled our Unwanted Mail service architecture to accommodate our rapid growth. Today, we’re diving into how the team migrated traffic to the new architecture—with zero downtime.
Read More
B Industry Leading CIS Os
Stay up to date on the latest cybersecurity trends, industry news, and best practices by following these 12 innovative and influential thought leaders on social media.
Read More
B Podcast Engineering 11 08 24 22
In episode 11 of Abnormal Engineering Stories, David Hagar, Director of Engineering and Abnormal Head of UK Engineering, continues his conversation with Zehan Wang, co-founder of Magic Pony.
Read More