Vulnerabilities and exploits

Last week Microsoft warned Windows users about vulnerabilities in the Windows Print Spooler service – CVE-2021-1675 and CVE-2021-34527 (also known as PrintNightmare). We are closely monitoring the situation and improving generic detection of these vulnerabilities.

Сybersecurity companies implement a variety of methods to discover previously unknown malware files. Machine learning (ML) is a powerful and widely used approach for this task. But can we rely entirely on machine learning approaches in the battle with the bad guys? Or could powerful AI itself be vulnerable?

We detected a wave of highly targeted attacks against multiple companies. Closer analysis revealed that all these attacks exploited a chain of Google Chrome and Microsoft Windows zero-day exploits.

SolarWinds attacks, MS Exchange vulnerabilities, fake adblocker distributing miner, malware for Apple Silicon platform and other threats in Q1 2021.

In Q1 2021, we blocked more than 2 billion attacks launched from online resources across the globe, detected 77.4M unique malicious and potentially unwanted objects, and recognized 614M unique URLs as malicious.

In the EU, 70% of user computers experienced at least one Malware-class attack, 115,452,157 web attacks and 86,584,675 phishing attempts were blocked.

CVE-2021-28310 is an out-of-bounds (OOB) write vulnerability in dwmcore.dll, which is part of Desktop Window Manager (dwm.exe). We believe it is exploited in the wild, potentially by several threat actors.

The four vulnerabilities inside Microsoft Exchange Server allow an attacker to gain access to all registered email accounts, or to execute arbitrary code (RCE) within the Exchange Server context.

The Digital Footprint Intelligence Service announces the results of research on the digital footprints of governmental, financial and industrial organizations for countries in the Middle East region.

Kaspersky solutions blocked 666,809,967 attacks launched from online resources in various countries across the world, 173,335,902 unique URLs were recognized as malicious by Web Anti-Virus.

More than six years have passed since the banking Trojan Emotet was first detected. During this time it has repeatedly mutated, changed direction, acquired partners, picked up modules, and generally been the cause of high-profile incidents and multimillion-dollar losses.

Kaspersky solutions blocked 1,416,295,227 attacks launched from online resources across the globe. Ransomware attacks were defeated on the computers of 121,579 unique users.

MATA framework, Garmin attack, Operation PowerFall, DeathStalker group and other events of 2020.

As protection methods improve, the developers of miners have had to enhance their own creations, often turning to non-trivial solutions. Several such solutions (previously unseen by us) were detected during our analysis of the open source miner XMRig.

In 2019, on VirusTotal, we encountered a curious piece of Android spyware which, when analyzed, seemed connected to GravityRAT. The cybercriminals had added a spy module to Travel Mate, an Android app for travelers to India, the source code of which is available on Github.