New Emotet Campaign Bypasses Microsoft Blocks to Distribute Malicious OneNote Files

Check Point Research reports that Emotet Trojan launched a new campaign last month to evade Microsoft’s macro block, sending spam emails containing malicious OneNote files. Meanwhile Ahmyth was the most prevalent mobile malware and Log4j took top spot once again as the most exploited vulnerability

Check Point® Software Technologies, a leading provider of cybersecurity solutions globally, has published its Global Threat Index for March 2023. Last month, researchers uncovered a new malware campaign for Emotet Trojan, which rose to become the second most prevalent malware.

As reported earlier this year, Emotet attackers have been exploring alternative ways to distribute malicious files since Microsoft announced they will block macros from office files. In the latest campaign, the attackers have adopted a new strategy of sending spam emails containing a malicious OneNote file.

Once opened, a fake message appears to trick the victim into clicking the document, which downloads the Emotet infection. Once installed, the malware can gather user email data such as login credentials and contact information. The attackers then use the gathered information to expand the reach of the campaign and facilitate future attacks.

“While big tech companies do their best to cut off cybercriminals at the earliest point, it’s near impossible to stop every attack from bypassing the security measures. We know that Emotet is a sophisticated Trojan and it is no surprise to see it has managed to navigate Microsoft’s latest defenses.

The most important thing people can do is make sure they have appropriate email security in place, avoid downloading any unexpected files and adopt heathy skepticism about the origins of an email and its contents” said Maya Horowitz, VP Research at Check Point Software.

CPR also revealed that “Apache Log4j Remote Code Execution” was the most exploited vulnerability, impacting 44% of organizations globally, followed by “HTTP Headers Remote Code Execution” with 43% of organizations worldwide and “MVPower DVR Remote Code Execution” with a global impact of 40%.

Top malware families

Globally, Qbot was the most prevalent malware last month with an impact of more than 10% on worldwide organizations respectively, followed by Emotet and Formbook with a 4% global impact.

In Nigeria, Qbot was the most prevalent malware last month with an impact of more than 32.36%, followed by Expiro with 19.35% and BlackCat with a 9.68% impact.

• Qbot– Qbot AKA Qakbot is a banking Trojan that first appeared in 2008. It was designed to steal a user’s banking credentials or keystrokes and is often distributed via spam emails. Qbot employs several anti-VM, anti-debugging and anti-sandbox techniques to hinder analysis and evade detection.
• Expiro– Expiro is a polymorphic file infector first seen in 2010. It inserts its malicious code into executable files on the infected host. These files lead to new infections when they are run on other machines. Expiro steals user and system information from Windows, as well as FTP credentials.
• BlackCat– BlackCat (aka ALPHV) operates in a ransomware-as-a-service (RaaS) business model. BlackCat ransomware is highly customizable ransomware that allows for attacks on a wide range of corporate environments. It targets both Linux and Windows systems, and is coded in Rust.

Top Attacked Industries in Africa

Last month, Manufacturing remained the most attacked industry globally, followed by Consultant and then Leisure/Hospitality.

• Manufactoring
• Consultant
• Leisure/Hospitality

Top exploited vulnerabilities

Last month, “Apache Log4j Remote Code Execution” was the most exploited vulnerability, impacting 44% of organizations globally, followed by “HTTP Headers Remote Code Execution” with 43% of organizations worldwide and “MVPower DVR Remote Code Execution” with a global impact of 40%.

• ↑ Apache Log4j Remote Code Execution (CVE-2021-44228) – A remote code execution vulnerability exists in Apache Log4j. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system.
• ↑ HTTP Headers Remote Code Execution (CVE-2020-10826,CVE-2020-10827,CVE-2020-10828,CVE-2020-13756)– HTTP headers let the client and the server pass additional information with an HTTP request. A remote attacker may use a vulnerable HTTP Header to run arbitrary code on the victim machine.
• ↑MVPower DVR Remote Code Execution –A remote code execution vulnerability exists in MVPower DVR devices. A remote attacker can exploit this weakness to execute arbitrary code in the affected router via a crafted request.

Top Mobile Malwares

Last month, Ahmyth moved to the top spot as the most prevalent mobile malware, followed by Anubis and Hiddad.

• AhMyth – AhMyth is a Remote Access Trojan (RAT) discovered in 2017. It is distributed through Android apps that can be found on app stores and various websites. When a user installs one of these infected apps, the malware can collect sensitive information from the device and perform actions such as keylogging, taking screenshots, sending SMS messages, and activating the camera.
• Anubis – Anubis is a banking Trojan malware designed for Android mobile phones. Since it was initially detected, it has gained additional functions including Remote Access Trojan (RAT) functionality, keylogger, audio recording capabilities and various ransomware features. It has been detected on hundreds of different applications available in the Google Store.
• Hiddad – Hiddad is an Android malware which repackages legitimate apps and then releases them to a third-party store. Its main function is to display ads, but it can also gain access to key security details built into the OS.

Check Point’s Global Threat Impact Index and its ThreatCloud Map is powered by Check Point’s ThreatCloud intelligence. ThreatCloud provides real-time threat intelligence derived from hundreds of millions of sensors worldwide, over networks, endpoints and mobiles. The intelligence is enriched with AI-based engines and exclusive research data from Check Point Research, the intelligence and research Arm of Check Point Software Technologies.