Xmrig Crypto Miner

XMRig is a high-performance, open-source cryptocurrency mining software that allows users to mine Monero (XMR), among other cryptocurrencies. The software has been identified in several instances of unauthorized crypto-mining activities, often used in conjunction with other malicious software to exploit system vulnerabilities and perform illicit mining operations. Notably, it has been observed to be deployed alongside rootkits such as r77, an open source userland rootkit, a combination not previously seen in these types of cyber attacks. The deployment process of XMRig has been carefully analyzed, particularly the multi-stage loading technique used by Water Sigbin, a known cyber threat actor. This technique involves the delivery of the PureCrypter loader, which subsequently loads the XMRig crypto miner onto the targeted systems. The use of multi-stage loading techniques makes the detection and prevention of these attacks more challenging, as each stage can potentially employ different evasion tactics. In a specific case, the r77 rootkit was used to deploy the XMRig crypto miner. This combination of tools presents a unique challenge for cybersecurity measures, as the rootkit can provide persistent access to the targeted system while the XMRig software performs the actual crypto-mining operation. This method of attack underscores the evolving sophistication of cyber threats and emphasizes the need for continuous updates and improvements in cybersecurity strategies and technologies.