Un.Neuron Posted August 29, 2011 Report Posted August 29, 2011 We've had reports of a new worm in the wild and that generates increased RDP traffic for our users on port 3389. Although the overall numbers of computers reporting detections are low in comparison to more established malware families, the traffic it generates is noticeable. The worm is detected as Worm:Win32/Morto.A and you can see a detailed description of it at Worm:Win32/Morto.A.Morto attempts to compromise Remote Desktop connections in order to penetrate remote systems, by exploiting weak administrator passwords. Once a new system is compromised, it connects to a remote server in order to download additional information and update its components. It also terminates processes for locally running security applications in order to ensure its activity continues uninterrupted. Affected users should note that a reboot may be required in order to complete the cleaning process.This particular worm highlights the importance of setting strong system passwords. Using strong passwords can go a long way towards protecting your environment -- and the ability of attackers to exploit weak passwords shouldn't be underestimated. For example, Morto tries the following passwords:*123401111233691111123451111111231231233211234561681685205206543216666668888881234567123456781234567891234567890%u%%u%121234qwer1q2w3e1qaz2wsxaaaabc123abcd1234adminadmin123letmeinpasspasswordservertestusersursa> New worm targeting weak passwords on Remote Desktop connections (port 3389) - Microsoft Malware Protection Center - Site Home - TechNet Blogs Quote
