Description Win32/Sinowal aka "Torpig" is a family of bot controlled Trojan designed to
steal sensitive information including online banking credentials. It transmits harvested data to a remote server via HTTP communication channel. Win32/Sinowal is distributed and installed by the Win32/Mebroot botnet.
This is a "Backdoor Trojan" ...
These are the most dangerous, and most widespread, type of Trojan.
Backdoor Trojans provide the author or ‘master’ of the Trojan with remote ‘administration’ of victim machines. Unlike legitimate remote administration utilities, they install, launch and run invisibly, without the consent or knowledge of the user. Once installed, backdoor Trojans can be instructed to send, receive, execute and delete files, harvest confidential data from the computer, log activity on the computer and more.
If your computer was used for online banking or has credit card information on it, all passwords should be changed immediately to include those used for email, eBay and forums.
You should consider them to be compromised.
They should be changed by using a different computer and not the infected one, if not an attacker may get the new passwords and transaction information.
Banking and credit card institutions should be notified of the possible security breech.
More info can be found below:
How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
How to report ID theft, fraud, drive-by installs, hijacking and malware? Security | DSLReports.com, ISP Information
When should I re-format? How should I reinstall?
When should I re-format? How should I reinstall? Security | DSLReports.com, ISP Information