Multi-Platform Malware

This comes under the heading of “it was inevitable.”  There is a new malware product that runs effectively on both Windows and Linux systems.  Since OSx looks a lot like Linux under the hood, can a Win/Lin/Mac triple-threat be far away?  Called “WellMess,” this malware takes advantage of the dual platform capabilities of Google’s Golang programming language to work.

WellMess malware operates on Linux via ELF (Executable and Linkable Format) and on Windows via Portable Executables. The malware allows the attacker to execute commands, run PowerShell scripts, and upload and download files. The commands are sent to the infected host using encrypted HTTP POST requests.  Communication from the infected system back to the CNC server via encrypted cookies.  The CNC servers controlling the infected systems are in places such as Lithuania, Sweden, The Netherlands, and China.  JPCERT has a free tool that can decrypt the cookies for analysis.

Currently the exploit seems to be targeting Japanese company networks, but we can expect this exploit to show up elsewhere.  If you are running Linux, installing the ClamAV anti-malware tool is a good step to prevent this and other Linux malware infections.


About the Author:

Cybersecurity guru to business owners in the St Paul, Minneapolis, and western Wisconsin area. Computer security and hacking have been a passion of mine since I entered the computer and networking business in 2000. In 2013 I completed a course of study and certification exam to become a Certified Ethical Hacker (CEH). In 2016 I was certified as a Certified Information Systems Security Professional (CISSP). As Cybersecurity Analyst at The WyzCo Group, I help our clients experience high levels of computer security, network security, and web site security. In addition to consulting on security products and services, we also conduct security audits, vulnerability assessments and full penetration tests. We also provide Cybersecurity Awareness Training for clients and their employees. We also work with companies and organizations that need to certify compliance with regulations such as PCI-DSS (credit card processing), HIPAA/HITECH (medical records), and GLBA. The views expressed on this Web site are mine alone and do not necessarily represent the views of my employer.

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