Russia has demonstrated that they can conduct so-called "hybrid warfare" as long as it doesn't lead to serious injury or death and the response will be meager. But it still creates pain for those targeted nations.

Iran could be seeing that this approach, rather than more blatant attacks, is a useful way to create problems for the US's allies with a lower risk of elevating those US allies to direct enemies. The intention would be to get the US allies to put pressure on the US (in particular) to back out of the US/Israel war on Iran.

> Russia has demonstrated that they can conduct so-called "hybrid warfare" as long as it doesn't lead to serious injury or death and the response will be meager

At a certain point, it stops being "hybrid warfare" and starts being "obnoxious prank".

Russia's deployed (small amounts of) WMDs offensively and has blown up/set fire to some military infrastructure on NATO soil. I'd call these things "hybrid warfare".

Making a grocery store file a claim with their insurance for unrefrigerated food is more along the lines of "dick move".