Today will be a busy day, must change passwords for all my online accounts. I have a lot of them...
An hour ago, I received an SMS (text message as you Yanks say), which clearly is a 2FA authentication code:
Problem is, I have no idea for which account. I was drinking my breakfast, watching news on TV, when the SMS came. Only thing sure is, that someone, somewhere was trying to get in to one of my accounts, and had already found the password.
In my case, the UK country code +44 makes it almost sure that it's one of my various Microsoft related accounts. Microsoft has no logic in sending these codes, sometimes I see sender as "Microsoft", sometimes a German sender (country code +49):
If so, the six digit code tells it's an AD account instead of personal MS account; for reasons I do not know, personal MS account codes received as SMS have 7 digits (last one in above screenshot), whereas workplace AD account codes have 6 digits.
So, first I did was to change password on each of my AD accounts. Work continues, though, because there's still a possibility it's not about an AD or MS account. I could also be any third party account.
Anyone in UK, could you please tell what's the sender's area code. Searching UK area codes, I can not find anything when searching for instance 077.
Kari