Name: Backdoor.Solufina Category: Backdoor Alias: winfrw Advice: Remove Risk: Severe Risk Severe threats typically are remotely exploitable vulnerabilities, which can lead to system compromise. Successful exploitation does not normally require any interaction and exploits are in the wild. There exists a high possibility of potential system damage or security flaw. Attacker has complete control over your computer or install new software on your machine. Description: Backdoor.Solufina is a Trojan program that acts as a proxy server. It has the ability to allow unauthorized remote access to a compromised computer. Backdoor.Solufina may be downloaded from the planet.nana.co.il domain. When it is executed, it performs the following actions: Creates a mutex named "88FinalSolution88", which allows only one instance of the back door to run on the compromised computer. Starts a proxy server on TCP port 559. Adds the values: "Windows System Configuration" = "%Windir%WINFRW.exe" "Windows Security Updater" = "%Windir%WINFRW.exe" to the registry subkeys: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun so that is it executed every time Windows starts. Signatures: process: winfrw.exe: MD5 Hash: 3eabd0e6a6e5ea6ed19... process: winfrw.exe: MD5 Hash: 7a6de467808b9be5e74... process: winfrw.exe: MD5 Hash: 7af31ce2a2d30e86b82... process: winfrw.exe: MD5 Hash: 6a4ef6a26bcf5464aa3... process: winfrw.exe: MD5 Hash: a6193383478584ec858... process: winfrw.exe: MD5 Hash: eedd11692e2a25610b5... process: winfrw.exe: MD5 Hash: 8dbcc7df90508c9f417... process: winfrw.exe: MD5 Hash: 1050ef11f001f7c0a2b... process: winfrw.exe: MD5 Hash: f04373b38b1069f1740... process: winfrw.exe: MD5 Hash: 6eb04abfe640678ceee.. Type: Backdoor - A Trojan software is any software on a user's computer that the user is not aware or intentionally installed. Most Trojan software is designed to perform some sort of actions that could jeopardize the user's security or privacy.