Six year anniversary for Linux virus Rst-B

There are certainly not many Linux viruses (at least compared to Windows platform) but it seems that Linux viruses have very long life. After 6 years Rst-B is still active and not only that, it also is responsible for infecting of 70% of Linux servers: 

Analysis of malware in Sophos's Linux honeypots have shown almost 70 percent of the infections are due to this six-year-old malicious program. Today, SophosLabs has made freely available a small detection tool to help Linux users find out whether they are unwittingly infected with this virus.