With the version 126.96.36.199 of the virus signatures RIOT 0.4 is detected as trojan (Trojan.Win32.Swisyn.aeca).
As this program does not contain malware and was tested with other antivirus engines, I contacted the Kaspersky Team to find out more.
Kirill Kruglov, Virus Analyst at Kaspersky Lab confirmed me that it was a false positive and replied it will be fixed in the next update.
Edit: This was fixed by Kaspersky in the next day.
So users don’t need to panic. RIOT is safe and does not contain any trojans.
Edit: It seems that other two obscure anti-virus engines have taken the Kaspersky false detection and report RIOT as being the same (false) trojan.
The anti-viruses in cause are Antiy-AVL and VBA32
I tried to contact and report this problem to the manufacturers but I received no answer. I would not trust such a manufacturer, that does not have the decency to reply and analyze a false detection. I find very strange the fact that they report the same trojan as Kaspersky. I even doubt they have their own research lab.
Back in the old days the anti-virus engines were much more precise. These new ones rely to much on heuristics for my taste, creating such unfortunate errors.