This question already has an answer here:
Is Iran safe to visit? Since Iraq shares its border with Iran, are there any signs or news of penetration of ISIS or ISIL or IS whatever you call them, inside Iran? Is it politically stable? And also, is it being attacked frequently by terrorists? In short, leaving behind pocket thieves, is it safe enough to spent 1 month in Iran? How much is probability of coming back alive. I belong to non-western country (i.e. India).
EDIT: I am narrowing down my question: Actually visit to Iran has aim of doing some machining repairing work at some company (not sure where it is, sorry). It might take up to 1 month. But some serious news show up in news mediums regarding Iraq about ISIS (or IS or ISIL). Also that terrorists from Iraq are spreading through the world and now they also have some impact over Syria so I want to know if there are same activities (specially from ISIS) in Iran.