Additional Details
Renos.GEN downloads rogueware, which attempts to persuade the user to buy a particular rogue antispyware application by pretending that the system is infected with spyware.
This trojan may arrive on the system as part of another malware's payload, from a user-initiated download, or through other means.
Installation
On installation, the trojan drops the file
• %WINDOWS%/system32/brastk.exe
and then creates a launchpoint for it. The brastk.exe file then attempts to download another file from a remote server.
ExecutionOn execution, this trojan will modify registry keys in order to bypass the Windows firewall, then download a rogue antispyware application from a remote server and save it onto the system, most commonly at
• %windir%\system32\winil104552502.exe
The actual save location may vary depending on the variant.
The malware subsequently creates a system tray icon that periodically displays the following message:
• "Your computer is infected!
Windows has detected spyware infection!
It is recommended to use special antispyware tools to prevent data loss.
Windows will now download and install the most up-to-date antispyware for you.
Click here to protect your computer from spyware!"
Clicking on the message will launch the downloaded rogue antispyware application.