It seems the recent attack originated from OPAL thread.
ATTENTION PLEASE READ ASAPWe found that a user (diabanhxeo ID# 210031) posted a malicious post which included links to a hacked version of our wallet. This wallet installed a backdoor on some users computers which in turn stole their wallet.dat files from multiple coins. Through checking him out, we see he has posted many links to other coins's wallets, which we assume are also malicious.
If you downloaded the latest windows wallet from this thread, that was part of a reply and not our original post. Please scan your computer now for malware. Only download the wallet from our website opal-coin.com and not any other links in the thread. The source of the wallet should only be from "wallets.opal-coin.com" and no other domain.
We apologize for any inconvenience. We are dedicated to our community.
Thanks,
The Opal Team