https://malwr.com/analysis/ZmUxMWQzYWMxMDQ2NDY3NTg1OWUxZjI4ZmU1ZmFkYzQ/
https://malwr.com/analysis/NTI1OWVmYWE3ZTI0NDZmOTlmMjA4ZWE2NzM1MGFkZTY/
http://blog.checkpoint.com/wp-content/uploads/2015/07/matsnu-malwareid-technical-brief.pdf
http://www.spamfighter.com/News-19730-Researchers-Intercepted-a-New-Backdoor-Called-Matsnu.htm