Wtf?

[Quackondabeat]

Why did steam just take 100 dollars out of my account without any authorization and put it in my funds wtf is this?

[nullable]

Out of what account?

First guess, your account is compromised and someone else with access is able to do the same things uou can, like adding wallet funds.

You're gonna want to try and secure your account and refund the transaction.

[RPG Gamer Man]

Someone else is on your account. I suggest you run some virus scanners and malwarebytes to see if there are other things on it too.

Your account is compromised.

Do not trade until your account is secured.

Take the following steps to secure your account:

1. Scan for malware. https://www.malwarebytes.com/
2. Check that the email and phone number on the Steam account are still yours.
3. Deauthorize all other devices. https://store.steampowered.com/twofactor/manage
4. Change passwords from a clean computer.
5. Generate new backup codes for your Mobile App. https://store.steampowered.com/twofactor/manage
6. Revoke the API key (there should be no key). https://steamcommunity.com/dev/apikey