You should be careful, online banking transfer is no small matter, and the signature may be hijacked by phishing software. It is suggested to use a secure computer for online banking operation. If not, reinstall the system and online banking signature, and be sure not to be careless.
In this case, you should immediately stop the transfer, and contact the bank to verify the situation, eliminate hidden dangers, thoroughly disinfect the computer, and make sure there is no problem before transferring money.