New top 10 malware 'Ursnif banking trojan' over doubling its impact on organizations: Study

Several malicious spam campaigns are distributing the Ursnif banking trojan, which caused it to jump up 19 places to 5th in the Top Malware list, doubling its impact on organizations worldwide, according to Check Point Research’s latest Global Threat Index for May 2020.

The Ursnif banking trojan targets Windows PCs and is capable of stealing vital financial information, email credentials and other sensitive data. The malware is delivered in malicious spam campaigns via Word or Excel attachments. The new wave of Ursnif trojan attacks – which saw it enter the Top Malware index’s top 10 for the first time – coincides with reports about the demise of one of its popular variants, Dreambot. Dreambot was first spotted in 2014 and is based on Ursnif’s leaked source code. As reported since March 2020, Dreambot’s backend server has gone down, and no new Dreambot samples have been seen in the wild.

Meanwhile, the well-known banking trojan Dridex, which entered the malware top 10 for the first time in March, continued to have a significant impact throughout May, remaining in 1^st place for the second month running.The most prevalent mobile malware families also completely changed in May, with Android malware that generates fraudulent revenue from clicking on mobile adverts dominating the mobile index – showing how criminals are trying to monetize attacks against mobile devices.“With the Dridex, Agent Tesla and Ursnif banking trojans all ranking in the malware top 5 in May, it is clear cyber criminals are focusing on using malware that enables them to monetize their victim’s data and credentials,” said Maya Horowitz, Director, Threat Intelligence & Research, Products at Check Point.  “While COVID-19-related attacks have fallen, we have seen a 16% increase in overall cyber-attacks in May compared to March and April, so organizations must remain vigilant by using certain tools and techniques, especially with the mass shift to remote working, which attackers are taking advantage of.”

Top Malware Families

* The arrows relate to the change in rank compared to the previous month.

This month Dridex remains in 1st place, impacting 4% of organizations globally, followed by Agent Tesla and XMRig, both impacting 3% of organizations worldwide.

1. ↔ Dridex – Dridex is a Trojan that targets the Windows platform and is reportedly downloaded via a spam email attachment. Dridex contacts a remote server and sends information about the infected system. It can also download and execute arbitrary modules received from the remote server.
2. ↑ Agent Tesla – Agent Tesla is an advanced RAT functioning as a keylogger and information stealer, which capable of monitoring and collecting the victim’s keyboard input, system clipboard, taking screenshots, and exfiltrating credentials belonging to of a variety of software installed on a victim’s machine (including Google Chrome, Mozilla Firefox and Microsoft Outlook email client).
3. ↓ XMRig – XMRig is open-source CPU mining software used for the mining process of the Monero cryptocurrency, and first seen in-the-wild on May 2017.

Top Exploited Vulnerabilities

This month “MVPower DVR Remote Code Execution” is still holding 1^st place as the most common exploited vulnerability, impacting 45% of organizations globally. The second most popular exploited vulnerability is “OpenSSL TLS DTLS Heartbeat Information Disclosure”, closely followed by “Web Server Exposed Git Repository Information Disclosure” impacting 40% and 39% of organizations respectively.

1. MVPower DVR Remote Code Execution – A remote code execution vulnerability that exists in MVPower DVR devices. A remote attacker can exploit this weakness to execute arbitrary code in the affected router via a crafted request.
2. ↑ OpenSSL TLS DTLS Heartbeat Information Disclosure (CVE-2014-0160; CVE-2014-0346) – An information disclosure vulnerability which exists in OpenSSL. The vulnerability is due to an error when handling TLS/DTLS heartbeat packets. An attacker can leverage this vulnerability to disclose memory contents of a connected client or server.
3. ↑ Web Server Exposed Git Repository Information Disclosure – An information disclosure vulnerability has been reported in Git Repository. Successful exploitation of this vulnerability could allow an unintentional disclosure of account information.

Top Malware Families – Mobile

This month, the top three malware families completely changed, with PreAmo in 1st place as the most prevalent Mobile malware, followed by Necro and Hiddad.

1. PreAmo – PreAmo is an Android Malware imitates the user by clicking on banners retrieved from three ad agencies: Presage, Admob, and Mopub.
2. Necro – Necro is an Android Trojan Dropper. It can download other malware, showing intrusive ads and stealing money by charging paid subscriptions.
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.