Aliases

Virus.Win32.Donut (Kaspersky Lab) is also known as: Win32.Donut (Kaspersky Lab), W32/Donut.dr (McAfee),   W32.Donut (Symantec),   Win32.Benny.3904 (Doctor Web),   W32/Donut-A (Sophos),   Win32/Donut.862 (RAV),   PE_DONUT.A-O (Trend Micro),   W32/GoDog (H+BEDV),   W32/Donut.3904 (FRISK),   Win32:Donut (ALWIL),   Win32/Donut.A (Grisoft),   Win32.Donut.A (SOFTWIN),   W32/Donut (Panda),   Win32/Donut.A.Gener1 (Eset)

Description added	Jan 31 2002
Behavior	Virus

Technical details

This is a harmless parasitic Win32 virus. It consists of two parts: the virus itself written in assembly language, and the payload written in MSIL.

The virus searches for Win32 PE EXE .NET applications. It infects files in up to 20 upper level directories.

While infecting, the virus writes itself to the end of the file, then the virus writes its payload instead of the original host's metadata, which is moved down. When an infected file is launched, the virus creates a copy of the infected file, restores its metadata and launches it.

The original content of infected files is able to work only in Windows 2000. When an infected file is launched in Windows XP, the virus will still work, but the host file won't launch.

Depending of the random counter (in 1 in 10 cases), the virus displays the following message box:

 ________________________________________________
 I.NET.dotNET by Benny/29A                       I
 I_______________________________________________I
 IThis cell has been infected by dotNET virus!   I
 I_______________________________________________I 

The virus body contains the text string:

This cell has been infected by dotNET virus!