YaRab.exe, virus?

Behaviorial blockers:

Description Unlike signature based scanners which are mostly focuses on code, behaviorial blockers focus on detecting and blocking generic malicious behavior and events as they happen. Behavior blockers also commonly referred to as HIPS (Hosts Intrusion Prevention Systems), sometimes also known as system firewalls and also IDS/IPS (Intrusion Detection/Prevention Systems).

Pros : Compared to Antiviruses using traditional blacklisting technology they are proactive in that they can detect a wide range of malware without the need for signatures. In theory, while there are infinite ways to write code and ways to evade signatures, the range of malicious behavior is finite.