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Bring Your Own Filesystem (BYOF) attacks

Updated on 2022-12-06: BYOF attacks

Researchers with cloud security firm Sysdig say they’re seeing attacks carried out by a new threat actor that deploys an open-source tool on infected servers to simplify cross-platform compatibility issues. Named PRoot, the tool deploys a universal filesystem that works across multiple Linux versions. Sysdig says the attacker is installing the tool on compromised systems in order to make their malware compatible with the underlying OS architecture. Sysdig called this novel technique Bring-Your-Own-Filesystem, since it allows the attacker to optimize their malware for PRoot, and then deploy across a wide variety of Linux architectures. While the threat actor appears to be focused on deploying a banal crypto-miner, Sysdig says the technique could be attractive for many other threat actors targeting Linux environments. Read more: Discovered new BYOF technique to cryptomining with PRoot


Hackers were found abusing the open-source Linux PRoot utility in Bring Your Own Filesystem (BYOF) attacks to offer a constant repository for malicious tools compatible with Linux distributions. Read more: Hackers hijack Linux devices using PRoot isolated filesystems

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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