Steam Account Users Getting Hacked via Fake Steam Guard File and Steals Username and Password

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By Ryan Inoyori | June 26, 2014 2:23 PM EST

New phishing scheme on Valve's Steam is now attempting a brand new trick for users to download malicious software which bypasses the security measure implemented by Steam Guard that all players should know about.

New Phishing Scheme against Steam

A new phishing scheme is now challenging Valve's security measure called Steam Guard system on Valve's Steam account by tricking users to download malicious software. The new scheme bypasses Steam Guard and leads account holders to upload Steam Guard SSFN file to a fake login page.

Based on the details from Malwarebytes, phishers have managed to evade Steam Guard implementation on Steam gaming accounts which asks users to dig out relevant Steam Guard SSFN file from their folders then have them upload manually through a fake login page.

Once the phishers are able to retrieve the sensitive information, they can now use the collected usernames and passwords to ultimately bypass the protection and make use of the accounts for themselves.

Schemers commonly trick users by simply sending a private message telling that "my friend" wants to trade but unable to add due to Steam error claim. Included on the private message is the fake Steam Web page pretending as a community site containing interesting in-game items for trading.

Engaging Phishers

A fake profile will also be visible with non-existent rare items to entice users on accepting trade-in items. Once convinced, tricked users are sent over a fake login page similar to the standard login page.

Using an old scamming scheme, users will see a fake Steam Guard box that asks to navigate the Steam folder. After that, it will request to upload the SSFN file manually to the phishing page.

Malwarebytes caught the odd part with the file based on the notification text appearing on the fake Steam Guard executable file.

"Hello! We see you're logging into Steam from a new browser or new computer.

As an added account security measure you'll need to grant access to this browser by running the special tool (SteamGuard) we just sent to your computer.

To complete login you should click to open tool, then authentication is automatically completed. We worry about your security and every time improve protection."

Running the file is a wrong move regardless of its claim as a Steam Guard security feature and will compromise any secured gaming accounts on Steam. Unsuspecting account holders should know what will happen next after executing the file:

1. It contacts a ".ru domain" to begin phising.

2. After the contact, it will start to locate the Steam folder on the machine.

3. Detects the SSFN file.

4. Uploads the files to the phishing Web site.

5. Allow phishers to use stolen username and password without any hassle.

If any users utilize the Malwarebytes Anti-Malware software, the file will be detected as a Spyware.Steam. There is no accurate details yet regarding the domain or how it penetrates and able to fake out a Steam Guard file but it appears to be a form of Steam spamming tool.

Valve's Steam gaming account holders should alert friends regarding this invasion to prevent sensitive data from being stolen.

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