Comment by kay_o

9 hours ago

I have not seen one of these that wasn't a compromised hotel email or booking account. I have had to "help" a hotel get malware/RATs off their system more than a dozen times as a _guest_

I've started to assume that any non-chain hotel is compromised after losing $2k to hackers that completely owned the hotel's email system. Thankfully DMARC made it irrefutable that it was their system at fault and they assumed liability. BEC is shockingly common and difficult to detect until it's too late.