[Ethereum] Is it possible, I don’t have password for the wallet

Make sure Mist is running.

Run this command to attach to the geth daemon:

geth attach

In the JavaScript console you can try this:

personal.unlockAccount('ADDRESS', null, 1)

You will be asked for the password.

This command will return true and unlock your account for 1 second if the password is correct. If it's not you will get an error message:

Error: could not decrypt key with given passphrase

Did you create the address while online? It is almost impossible to brute force a private key in a life time with current computer power, much less several of them in a very short amount of time. The recipient address has a total 10 transactions in less than 15 minutes, you were not the only victim.

One possibility is you inadvertently used a scam site, or your computer was compromised with a malware, you connection was not secure and the generated private key was copied by hackers. To avoid any suspicious they didn't use the private keys immediately.

Hardware wallets should be secure, they advantage is the private key is securely stored in the device internal memory and never reaches your computer.

Advices is you verify MEW site is the correct one. Generate keys offline in a computer that never was connected to the internet. Do not use public computers or unsafe connections to make a transactions.