Lastly, the downloaded shell script is executed. Figure 2: How the shell script is downloaded and saved. Once executed, the shell script first checks whether there is an update available for the malware. If there is an update available, the shell script will then call its echocron function responsible for downloading and scheduling a task that will execute the malware update.
e — How to quickly look up a virus in the virus database
If there are no updates available, the shell script will then proceed to its routine by first calling its downloadrun function shown in Figure 4 , which downloads the actual malicious cryptocurrency miner. Although the extension of the URL it connects to is. After downloading and executing the cryptocurrency-mining malware, the shell script then calls its init function, which downloads a version of the initial file. Afterwards , the echocron function is called. The shell script will sleep for 10 seconds then check whether a connection was made on port If there were no connections, it will execute its downloadrunxm function.
This function is responsible for downloading another cryptocurrency miner Coinminer. The updated version of the malware has the top function, which is responsible for downloading and installing the rootkit.
New Linux crypto-miner steals your root password and disables your antivirus
It first checks whether there is already a rootkit installed in the affected machine. Typically, process monitoring tools can detect the presence of a cryptocurrency miner. To that end, the rootkit hooks the readdir and readdir64 application programming interfaces APIs of the libc library.
These APIs are commonly used by process monitoring tools to get its information. While the rootkit fails to hide the high CPU usage and the connections made by the cryptocurrency miner, it improved its stealth by just editing a few lines of code and repurposing existing code or tools.
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Risks and Threats of the Internet of Things (IoT)
Google readies the Android ecosystem for enabling new key and ID functionality built on applets that run inside secure elements. Hades ransomware operators are hunting big game in the US. Search giant asks the watchdog to consult with the Attorney-General's Department, the OAIC, and privacy advocacy groups for the remainder of its ad tech inquiry.
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Please review our terms of service to complete your newsletter subscription. Sierra Wireless partially restores network following ransomware attack Production lines are operating again at the IoT device manufacturer, but internal IT systems remain down following a cyber attack on March