Remove Skype ads

1. Exit Skype
2. Open Internet Explorer
3. Open Internet Options
4. Go to Security and select Restricted sites
5. Click Sites
6. Add https://apps.skype.com/, click OK
7. Go to General, click Delete, and click Delete again
8. Open Skype, the blank space should be gone and there will be no ads

I don't know what the implications are and whether there any issues with other skype apps, but so far this is the only possible solution that I can think of."

Find malicious or hacked file in linux

First find the outgoing connections with the following command

netstat -nputwN

Check the connections and find the connection which is trying to attack the other systems. For example PID 11009 in this scenario.

Use the following command to identify the list of files involved in the process execution

lsof -p 11009