However, Valyria files could drop other malware, such as spyware that stealthily records data (e.g., audio, video, keystrokes, etc.), ransomware that encrypts data or locks the device's screen for ransom purposes, clippers that replace clipboard content, cryptominers that abuse system resources to mine cryptocurrency, and so on. For example, these trojans may have multiple functionalities for data theft or the ability to cause chain infections (i.e., download/install additional malware or malicious components). RATs are highly versatile malicious programs that enable remote access and control over infected devices. Information of interest may include: browsing and search engine histories, Internet cookies, usernames/passwords for various accounts (e.g., online banking, e-commerce, digital wallets, emails, social media, etc.), personally identifiable details, credit card numbers, and so forth. The former operates by extracting sensitive data from systems and installed apps. In most cases, files marked as 'Valyria' are droppers that infect devices with harmful content.ĭroppers can inject systems with particularly dangerous malware like trojans within the stealer and RAT (Remote Access Trojan) classifications. Most often, droppers inject high-risk malware into devices, but they may infiltrate harmful content like adware as well.Īs mentioned in the introduction, Valyria is a name assigned by multiple anti-viruses to malicious files. These types of files are designed to infect devices with malicious software. Typically, this detection indicates that the file is a dropper. Files of various formats, including (but not limited to) malicious Microsoft Office documents, VBS, JavaScript, EXE, and others – can be detected as 'Valyria'. Valyria is a detection name used by many security vendors.

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