Threat Descriptions

Trojan:W32/Tiny.E

Classification

Category :

Malware

Type :

Trojan

Platform :

W32

Aliases :

Trojan:W32/Tiny.E, Trojan.Win32.Tiny.E

Summary

Trojan:W32/Tiny.E launches the explorer.exe process and modifies the Windows Registry to create launch points in the system.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

On execution, the trojan modifies the following registry key:

  • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon Userinit=C:\WINDOWS\system32\userinit.exe

The modification is as follows:

  • Userinit=C:\WINDOWS\system32\userinit.exe, explorer.exe

Tiny.E also creates the following key:

  • HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Barsaka=explorer.exe