New Cryptominer Attacks Using Windows and Linux Bots

A new cryptominers botnet has been spotted to be building an army of bots.

What is going on?

This botnet has been seen to be active since last December and has been dubbed Sysrv-hello. This is a cryptojacking botnet having multiple architecture which can actively scan for vulnerable Windows and Linux enterprise server. It then infects them with monero miners as well as payloads containing self-propagating malware. Lacework detected that the threat actors are trying to exploit the RCE flaws in Apache Solar, Apache Struts, PHPUnit, etc for the initial access.

  • The botnets have been seen to use more than one wallet that are linked to multiple mining pools to store that cryptocurrencies that are earned illegally. This shows that the miners can be profitable to the attackers.
  • This malware also propagates through the network using brute force attacks after hacking into servers and killing other rival crypto miners.

Other miners trying to steal cryptocurrency-

  • Attackers created fake Microsoft DirectX12 download page which could inject malware which steals password and the waleet linked to cryptocurrency account.
  • ProxyLogon vulnerabilities was being exploited by Promotei, which is a multi staged botnet for crypto mining.
  • Nagios XI software was targeted by cyber criminals to abuse a remote command injection flaw (CVE-2021-25296) for the purpose of cryptojacking attacks. It can also deploy XMRig coinminer in the device of the victim.

Conclusion-

Cryptominers exploits vulnerabilities to spread its malware. So, the first step that one should take to prevent themselves from being a victim of this malware is to update the equipment. We should be careful about making mistakes while dealing with cryptocurrencies, it can put the system at risk.

By Hrithik Lall

IEMLabs is an ISO 27001:2013 and ISO 9001:2015 certified company, we are also a proud member of EC Council, NASSCOM, Data Security Council of India (DSCI), Indian Chamber of Commerce (ICC), U.S. Chamber of Commerce, and Confederation of Indian Industry (CII). The company was established in 2016 with a vision in mind to provide Cyber Security to the digital world and make them Hack Proof. The question is why are we suddenly talking about Cyber Security and all this stuff? With the development of technology, more and more companies are shifting their business to Digital World which is resulting in the increase in Cyber Crimes.

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