Account hack, skins sell no money received Help

[Dhillon]

Don't know how i have my account only in my pc and mobile, i not shared with anybody. But somebody sell my all skins and stuff and the shoking thing is he purchased cheap skins on high price like 0.20$ thing he purchased in 10$. I understand the scam but don't know how. I have one 2 step verification.

[Nx Machina]

Accounts are PHISHED because the end user gave away all their account details.

The account name, the password and the KEY to the door, the Steam Guard Mobile code, or scanning the QR code or authorising via fingerprint giving them access to the account.

How? by either logging into a known scam site or sites, tailored malware on your PC, the vote for my team scam, you have a pending ban scam on Discord, free knife click the link, signing in through a fake login window etc.

How does Steam (a program) know it is not you when all the account details are correct? It doesn't, therefore any action taken on your account is seen as you doing said actions.

The alternative is not plausible:

1) Someone would have to "GUESS" your account name from "millions of possible combinations".

2) Next they would have to "GUESS" your password from "millions of possible combinations" and then match it to your account name with "millions of possible combinations".

3) And finally they would have to "GUESS" the Steam Guard Mobile code "which changes every 30 seconds" to match both your account name and password to then have access your account.

[Aluvard]

Hijacked not hacked. Follow steps 1-6 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 trusted/clean device.
5. Generate new backup codes for your Mobile App https://store.steampowered.com/twofactor/manage
6. Revoke the API key https://steamcommunity.com/dev/apikey (there should be nothing in the APIKEY)

Regarding items:
https://help.steampowered.com/faqs/view/3B6E-B322-2400-8D24