Yesterday I got messaged by a person not in my list and because steam chat blocks such messages before you allow them - the only thing I managed to see is “vote for ‘whatever’ of mine here 'cuz of reasons” via steam notifications by a big boobed avatar. ;]
I was like … welp that’s a first one and it was bound to happen eventually, but today a lot of groups I participate in are addressing those “issues”. It seems the hackers are using hacked accounts to post fake gambling site links and what not which aren’t secured (not official steam login) and they can even steal your mobile phone authenticator details and data.
It’s better to avoid all kinds of links posted in steam groups or via PMs from people you don’t know for the time being (like clicking on random link was ever a good idea in the first place…).
Just letting you know and take care guys!