And () run on Linux.\n\n# Vulnerabilities\n\nLike many other botnets, Sysrv weaponizes bugs in WordPress plugins and in the Spring Framework. With billions of Internet-connected devices like cars, household appliances, surveillance cameras, and () online, IoT devices are a very large bullseye for botnet malware.\n\nThe number of malware infections targeting Linux devices () in 2021, most commonly to recruit IoT devices for (). Another is the usage of Linux as the go-to operating system for many IoT devices.\n\nIoT malware has matured over the years and has become popular, especially among botnets. One is the development of languages that enable the creation of multiplatform malware like Golang. Their activities can be tracked\u2014forever\u2014so keeping their identity secret depends on how well they can separate their real identity from their wallet IDs.\n\n# Linux malware\n\nWhile Linux malware was almost unheard of a few years ago, a couple of factors have \u201chelped\u201d the development of malware that targets Linux based systems. That's a big perk given the unrest in cryptocurrency markets at the time of writing.\n\nWith cryptocurrencies, users hide behind a pseudonym, like one or more wallet IDs. Monero is a cryptocurrency designed for privacy, promising \u201call the benefits of a decentralized cryptocurrency, without any of the typical privacy concessions\u201d.\n\nNo cryptocurrency is anonymous, as many people think, but there are other reasons why cryptojackers favor Monero:\n\n * Many cryptomining algorithms run significantly better on ASICs or GPUs, but Monero mining algorithms run better on CPUs, which matches what the cryptojacker can expect to find in a containerized environment.\n * Like Bitcoin, Monero is one of the better known cryptocurrencies and therefore is expected to hold its value.
Really, any vulnerability that can be exploited to infect the machines.\n\nOnce it has gained a foothold and the bot malware is running on a compromised system it deploys a Monero cryptocurrency miner.\n\n# The favorite cryptocurrency\n\nThe most popular cryptocurrency for attackers to mine is Monero.
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One of the advantages of the Golang language for malware authors is that it allows them to create multi-platform malware\u2014the same malware binaries can be used against Windows and Linux machines.\n\nThe latest Sysrv variant scans the Internet for web servers that have security holes offering opportunities such as path traversal, remote file disclosure, and arbitrary file download bugs. Since then the botnet has evolved, gained new features, and changed its behavior.
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, "published": "T00:00:00", "type": "nessus", "title": "Spring Cloud Gateway ), the Microsoft Security Intelligence team have revealed new information about the latest versions of the Sysrv botnet.\n\nThe variant they focused on uses a range of known exploits for vulnerabilities in web apps and databases to install cryptocurrency miners on both Windows and Linux systems.\n\n# Background\n\nThe Sysrv botnet first received () at the end of 2020 because at the time it was one of the rare malware binaries written in Golang (aka GO).
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