Win32/Urelas [Threat Name] go to Threat

Win32/Urelas.U [Threat Variant Name]

Category trojan
Size 84083 B
Aliases Trojan:Win32/Urelas.AA (Microsoft)
  Trojan.DownLoader9.15094 (Dr.Web)
Short description

Win32/Urelas.U is a trojan which tries to download other malware from the Internet. The file is run-time compressed using Packman .


When executed, the trojan copies itself into the following location:

  • %system%\­opert.exe

In order to be executed on every system start, the trojan sets the following Registry entry:

  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows NT\­CurrentVersion\­Windows]
    • "Run" = "%system%\­opert.exe"

After the installation is complete, the trojan deletes the original executable file.

Information stealing

The trojan collects the following information:

  • operating system version
  • installed software

The trojan attempts to send gathered information to a remote machine.

Other information

The trojan contains a list of (3) URLs.

It tries to download several files from the addresses.

The files are stored in the following locations:

  • %temp%\­datse.exe
  • %currentfolder%\­tmp%variable%.exe

A string with variable content is used instead of %variable% .

The files are then executed.

The TCP protocol is used.

The trojan keeps various information in the following files:

  • %system%\­golfinfo.ini
  • %system%\­golfset.ini
  • %temp%\­golfinfo.ini
  • %temp%\­golfset.ini

The trojan may set the following Registry entries:

  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows NT\­CurrentVersion\­Windows]
    • "TrayKey" = "datse"

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