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Ransomware attacks have reached an unprecedented scale in the healthcare sector, exposing vulnerabilities that put millions at risk. Recently, UnitedHealth revealed that 190 million Americans had their personal and healthcare data stolen during the Change Healthcare ransomware attack, a figure that nearly doubles the previously disclosed total.  This breach shows just how deeply ransomware can infiltrate critical systems, leaving patient trust and care hanging in the balance. One of the groups that targets this already fragile sector is the Interlock ransomware group. Known for their calculated and sophisticated attacks, they focus on hospitals, clinics, and other medical service providers. Interlock Ransomware Group: An Active Threat to Healthcare The Interlock ransomware group is a relatively recent but dangerous player in the world of cybercrime, known for employing double-extortion tactics.  This method involves encrypting a victim's data to disrupt operations and th...

Cyber attackers never stop inventing new ways to compromise their targets. That's why organizations must stay updated on the latest threats.  Here's a quick rundown of the current malware and phishing attacks you need to know about to safeguard your infrastructure before they reach you. Zero-day Attack: Corrupted Malicious Files Evade Detection by Most Security Systems  The analyst team at ANY.RUN recently shared their analysis of an ongoing zero-day attack . It has been active since at least August and still remains unaddressed by most detection software to this day. The attack involves the use of intentionally corrupted Word documents and ZIP archives with malicious files inside. VirusTotal shows 0 detections for one of the corrupted files Due to corruption, security systems cannot properly identify the type of these files and run analysis on them, which results in zero threat detections. Word will ask the user if they want to restore a corrupted file Once these fi...

Attack surfaces are growing faster than security teams can keep up – to stay ahead, you need to know what's exposed and where attackers are most likely to strike. With cloud adoption dramatically increasing the ease of exposing new systems and services to the internet, prioritizing threats and managing your attack surface from an attacker's perspective has never been more important. In this guide, we look at why attack surfaces are growing and how to monitor and manage them properly with  tools like Intruder . Let's dive in. What is your attack surface? First, it's important to understand what we mean when we talk about an attack surface. An attack surface is the sum of your digital assets that are 'reachable' by an attacker – whether they are secure or vulnerable, known or unknown, in active use or not. You can also have both internal and external attack surfaces - imagine for example a malicious email attachment landing in a colleague's inbox, vs a new FTP server being...

Tactics, techniques, and procedures (TTPs) form the foundation of modern defense strategies. Unlike indicators of compromise (IOCs), TTPs are more stable, making them a reliable way to identify specific cyber threats. Here are some of the most commonly used techniques, according to ANY.RUN's Q3 2024 report on malware trends, complete with real-world examples. Disabling of Windows Event Logging (T1562.002) Disrupting Windows Event Logging helps attackers prevent the system from recording crucial information about their malicious actions. Without event logs, important details such as login attempts, file modifications, and system changes go unrecorded, leaving security solutions and analysts with incomplete or missing data. Windows Event Logging can be manipulated in different ways, including by changing registry keys or using commands like "net stop eventlog". Altering group policies is another common method. Since many detection mechanisms rely on log analysis to identify s...

Sandboxes are synonymous with dynamic malware analysis. They help to execute malicious files in a safe virtual environment and observe their behavior. However, they also offer plenty of value in terms of static analysis. See these five scenarios where a sandbox can prove to be a useful tool in your investigations. Detecting Threats in PDFs PDF files are frequently exploited by threat actors to deliver payloads. Static analysis in a sandbox makes it possible to expose any threat a malicious PDF contains by extracting its structure. The presence of JavaScript or Bash scripts can reveal a possible mechanism for downloading and executing malware.  Sandboxes like ANY.RUN also allows users to scrutinize URLs found in PDFs to identify suspicious domains, potential command and control (C2) servers, or other indicators of compromise. Example: Static analysis of a PDF file in ANY.RUN Interactivity allows our users to manipulate files within a VM as they wish, but static Discovery off...

Processing alerts quickly and efficiently is the cornerstone of a Security Operations Center (SOC) professional's role. Threat intelligence platforms can significantly enhance their ability to do so. Let's find out what these platforms are and how they can empower analysts. The Challenge: Alert Overload The modern SOC faces a relentless barrage of security alerts generated by SIEMs and EDRs. Sifting through these alerts is both time-consuming and resource-intensive. Analyzing a potential threat often requires searching across multiple sources before finding conclusive evidence to verify if it poses a real risk. This process is further hampered by the frustration of spending valuable time researching artifacts that ultimately turn out to be false positives. As a result, a significant portion of these events remain uninvestigated. This highlights a critical challenge: finding necessary information related to different indicators quickly and accurately. Threat data platforms o...

Phishing attacks are steadily becoming more sophisticated, with cybercriminals investing in new ways of deceiving victims into revealing sensitive information or installing malicious software. One of the latest trends in phishing is the use of QR codes, CAPTCHAs, and steganography. See how they are carried out and learn to detect them. Quishing Quishing, a phishing technique resulting from the combination of "QR" and "phishing," has become a popular weapon for cybercriminals in 2023. By concealing malicious links within QR codes, attackers can evade traditional spam filters, which are primarily geared towards identifying text-based phishing attempts. The inability of many security tools to decipher the content of QR codes further makes this method a go-to choice for cybercriminals. An email containing a QR code with a malicious link Analyzing a QR code with an embedded malicious link in a safe environment is easy with  ANY.RUN : Simply open  this task  in th...

Remote Access Trojans (RATs) have taken the third leading position in ANY. RUN's  Q1 2023 report  on the most prevalent malware types, making it highly probable that your organization may face this threat. Though LimeRAT might not be the most well-known RAT family, its versatility is what sets it apart. Capable of carrying out a broad spectrum of malicious activities, it excels not only in data exfiltration, but also in creating DDoS botnets and facilitating crypto mining. Its compact footprint allows it to elude endpoint detection systems, making it a stealthy adversary. Interestingly, LimeRAT shares similarities with njRAT, which ANY.RUN ranks as the third most popular malware family in terms of uploads during Q1 2023. ANY.RUN researchers have recently conducted an in-depth analysis of a LimeRAT sample and successfully extracted its configuration. In this article, we'll provide a brief overview of that analysis. Collected artifacts SHA1 14836dd608efb4a0c552a4f370...