For the first time, AgentTesla has ranked second in the Check Point Research (CPR) Global Threat Index, while the established Dridex trojan is still the most prevalent malware, having risen to the top spot in March after being seventh in February.

This month, Dridex, a Trojan that targets the Windows platform, spread via QuickBooks Malspam Campaign. The phishing emails used QuickBooks’s branding and were trying to lure the user with fake payment notifications and invoices. The email content asked to download a malicious Microsoft Excel attachment that could cause the system to be infected with Dridex.

This malware is often used as the initial infection stage in ransomware operations where hackers will encrypt an organisation’s data and demand a ransom in order to decrypt it. Increasingly, these hackers are using double extortion methods, where they will steal sensitive data from an organization and threaten to release it publicly unless a payment is made.

CPR reported in March that ransomware attacks had seen a 57% increase in the beginning of 2021, but this trend has continued to spike and has completed a 107% increase from the equivalent period last year.

Most recently, Colonial Pipeline, a major US fuel company, was the victim of such an attack and in 2020, it is estimated that ransomware cost businesses worldwide around $20-billion – a figure that is nearly 75% higher than in 2019.

For the first time, AgentTesla ranked in second place in the top malware list. AgentTesla is an advanced RAT (remote access Trojan) that has been active since 2014 and functions as a keylogger and password stealer. This RAT can monitor and collect the victim’s keyboard input and system clipboard and can record screenshots and exfiltrate credentials entered for a variety of software installed on the victim’s machine (including Google Chrome, Mozilla Firefox and Microsoft Outlook email client).

This month there is an increase in AgentTesla campaigns, which spread via malspam. The email content is asking to download a file (it can be any file type) that could cause the system to be infected with Agent Tesla.

“While we are witnessing a huge increase in ransomware attacks worldwide, it’s no surprise that this month’s top malware is related to the trend. On average every 10 seconds globally, an organization becomes a victim of ransomware,” says Maya Horowitz, director: threat intelligence and research, products at Check Point. “Recently there have been calls for governments to do more about this growing threat, but it is showing no signs of slowing down.

“All organisations need to be aware of the risks and ensure adequate anti-ransomware solutions are in place. Comprehensive training for all employees is also crucial, so they are equipped with the skills needed to identify the types of malicious emails that spread Dridex and other malwares, as this is how many ransomware exploits start.”

CPR also revealed that “Web Server Exposed Git Repository Information Disclosure” is the most common exploited vulnerability, impacting 46% of organizations globally, followed by “HTTP Headers Remote Code Execution (CVE-2020-13756)” which impact 45.5% of organizations worldwide. “MVPower DVR Remote Code Execution” ranks in third place in the top exploited vulnerabilities list, with a global impact of 44%.

Top malware families
*The arrows relate to the change in rank compared to the previous month

This Month, Dridex is still the most popular malware with a global impact of 15% of organisations.

During the month of April in South Africa, Trickbox affected 11.04 % of the country’s organisations, followed by XMRig with 2.68% and Nanocore with 2.34%.
1. ↔ Trickbox – Trickbot is a modular Botnet and Banking Trojan that targets the Windows platform, mostly delivered via spam campaigns or other malware families such as Emotet. Trickbot sends information about the infected system and can also download and execute arbitrary modules from a large array of available modules: from a VNC module for remote control, to an SMB module for spreading within a compromised network. Once a machine is infected, the Trickbot gang, the threat actors behind this malware, utilize this wide array of modules not only to steal banking credentials from the target PC, but also for lateral movement and reconnaissance on the targeted organization itself, prior to delivering a company-wide targeted ransomware attack.
2. ↑ XMRig – First seen in the wild in May 2017, XMRig is an open-source CPU mining software used to mine Monero cryptocurrency.
3. ↑ Nanocore – NanoCore is a Remote Access Trojan, that was first observed in the wild in 2013 and targets Windows operating system users. All versions of the RAT feature base plugins and functionalities such as screen capture, crypto currency mining, remote control of the desktop and webcam session theft.

Top exploited vulnerabilities
This month “Web Server Exposed Git Repository Information Disclosure” is the most common exploited vulnerability, impacting 46% of organizations globally, followed by “HTTP Headers Remote Code Execution (CVE-2020-13756)” which impacts 45.5% of organizations worldwide. “MVPower DVR Remote Code Execution” takes third place in the top exploited vulnerabilities list, with a global impact of 44%.
1. ↑ Web Server Exposed Git Repository Information Disclosure – information disclosure vulnerability has been reported in Git Repository. Successful exploitation of this vulnerability could allow an unintentional disclosure of account information.
2. ↓ 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.
3. ↓ MVPower DVR Remote Code Execution – 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

This month xHelper takes first place in the most prevalent mobile malware, followed by Triada and Hiddad.

1. xHelper – A malicious application seen in the wild since March 2019, used for downloading other malicious apps and display advertisement. The application is capable of hiding itself from the user, and can reinstall itself in case it was uninstalled.
2. Triada – Modular Backdoor for Android which grants superuser privileges to downloaded malware.
3. 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.