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.

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About the Author:

Cybersecurity analyst, pen-tester, trainer, and speaker. Serving small business owners in the St Paul, Minneapolis, and western Wisconsin area since 2001. Cybersecurity and hacking have been a passion of mine since I entered the computer and networking business in 2000. I hold several cybersecurity certifications including Certified Information Systems Security Professional (CISSP), Certified Advanced Security Pratitioner (CASP), and Certified Ethical Hacker (CEH). Other computer industry certifications include A+, Network+ and Microsoft Certified System Engineer (MCSE). As Cybersecurity Analyst at The WyzCo Group, I help our clients experience high levels of security on their computers, networks, and websites. In addition to consulting on security products and services, we also conduct security audits, vulnerability assessments and full penetration tests. 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. We also provide Cybersecurity Awareness Training for clients and their employees. I am a frequent speakers at cybersecurity conferences such as the Minnesota Bloggers Conference, Secure360 Security Conference, the (ISC)2 World Congress, and the ISSA International Conference, and many local community organizations, Chambers of Commerce, SCORE, and several school districts. I have been blogging on cybersecurity since 2008.

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