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Of particular interest is its payment system, crystalpayio, which helps attackers conceal transactions. Notably, DCRat is accessible at a low cost and boasts a widespread user base. In the article, we’ve explored the functionalities of DCRat and its ecosystem. It is designed to automatically deobfuscate and identify hidden strings that have been obfuscated to evade detection. NET framework to identify the malware’s operational logic.Īlso, you can extract strings directly from the binary to obtain information such as hardcoded IP addresses, domain names, file paths, and other artifacts.įlare FLOSS is helpful for extracting strings from binaries. Look for patterns and rely on your comprehension of common malware behavior and knowledge of the. NET applications) to revert the obfuscated executable back into higher-level code. In static analysis, you can use decompilers (such as dnSpy or ILSpy for. NET RAT you need static analysis and code deobfuscation skills. It helps trace network traffic, and easily collect IOCs such as domain names, IP addresses, and other network-based signatures. Decryption code is also provided in the Appendix.ĪNY.RUN was highly useful for dynamic analysis. Mutex value which you can obsorve in ANY.RUN It prevents multiple instances of the same malware from running on the same host: It’s worth noting the inclusion of a Mutex (mutual exclusion object) value. You can see a decrypted config as follows: On the other hand, the dgz namespace is linked to C2 decryption features, housing methods for decrypting communication between the malware and its C2 server. The ns12 namespace encompasses functionality for config decryption, tasked with decrypting configuration data utilized by the malware to operate. NET code includes specific namespaces tailored to distinct functions pertaining to security and communication. This is our investigated infection chain of DCRat: This low cost makes it accessible to a wide array of cybercriminals, and its use has been observed by both novices and organized threat actors. One of the most alarming aspects of DCRat is its low price of just $5. Modularity also ensures that its code can be constantly mutated to bypass signature-based detection. This dual functionality makes it an especially nasty tool in the hands of cybercriminals.ĭCRat’s modular architecture allows for a high degree of customization, meaning that attackers can configure the malware for their specific objectives. It can compromise not just individual data but also potentially broader networks and contacts.ĭCRat, also known as Dark Crystal RAT, is both a Remote Access Trojan (RAT) and an information stealer. This inexpensive, yet highly capable malware gives threat actors complete surveillance over their victims, and its potential to access and control social network accounts adds another layer of risk. I noticed that DCRat seems to be gaining popularity as of late - it has been frequently mentioned in various underground online forums. Given the complexity and the range of functions of DCRat, underestimating this malware could lead to significant security breaches and data loss. Despite its low $5 price tag, it offers a wide array of malicious functions, such as full backdoor access to Windows systems, collection of sensitive personal information like usernames, passwords, and credit card details, capturing screenshots, and stealing Telegram, Steam, and Discord login credentials. This powerful malware has been available since 2018. In this article, I’ll guide you through the analysis process of DCRat using ANY.RUN. In today’s article, Mizuho guides us through surface, dynamic, and static analysis of DCRat. We’re super excited to introduce Mizuho ( on X) today, a software engineer and malware analyst making their debut on the ANY.RUN blog.