Threat Descriptons



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This malware spreads by copying itself to removable devices and replacing the autorun.inf of the device with its own copy to ensure automatic execution.


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

The file called suicide.bat is an installation helper file that deletes the original malware file. It performs a ping loopback on the system to check for the presence of a functioning network card.After completing its routine, the batch file deletes itself.

File System Changes

Creates these files:

  • %windir%\system32\csrcs.exe
  • %temp%\suicide.bat

Modified these files:

  • %temp%\aut1.tmp
  • %temp%\
  • %temp%\aut2.tmp
  • %temp%\

Process Changes

Creates these processes:

  • %windir%\system32\csrcs.exe
  • %windir%\system32\cmd.exe
  • %windir%\system32\ping.exe

Creates these mutexes:

  • 6E523163793968624

Registry Modifications

Sets these values:

  • HKLM\Software\Microsoft\DRM\amty ilop = 1
  • HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\MUICache\ C:\WINDOWS\system32\csrcs.exe =
  • HKLM\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\Run csrcs = C:\WINDOWS\system32\csrcs.exe
  • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon Shell = Explorer.exe csrcs.exe
  • HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced Hidden = 4718592
  • HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced SuperHidden = 4718706
  • HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced ShowSuperHidden = 4718706
  • HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL CheckedValue = 6553701
  • HKLM\Software\Microsoft\DRM\amty fix =
  • HKLM\Software\Microsoft\DRM\amty fix1 = 1

Creates these keys:

  • HKLM\Software\Microsoft\DRM\amty
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