The 'Sockets De Troie' (Trojan Sockets - fr.) virus is the biggest
high level language virus ever created (at least by the time of
creation of this description - October 1998). The length of its body
is more than 443 kb. The virus was created with Delphy 3. Currently 3
variants are known.
The DeTroie virus has a remote administration tool inside (like Back
Orifice or NetBus). But unlike other hacker tools the DeTroie remote
administration tool is spread with the virus code. There exist server
and client parts of DeTroie. The server part is spread with the virus.
The client part is a standalone application that is used to control
computers infected with DeTroie virus. Server and client parts use
TCP/IP protocol to communicate with each other.
Being executed the DeTroie virus shows an error dialog pretending to
be an innocent application lacking an important DLL (SETUP32.DLL). At
the same time the virus copies itself to Windows\System\ directory as
MSCHV32.EXE and modifies Windows Registry so it would be executed
during every further Windows bootup:
Load MSchv32 Drv = C:\WINDOWS\SYSTEM\MSchv32.exe
To check whether the computer is already infected the virus adds the
following key to the Registry:
DirectSocketsCtrl = $A4 D5 #FFF
The second variant of DeTroie virus installs itself in another way.
The error dialog indicates that ISAPI32.DLL is missing. The virus
copies itself 3 times to Windows\ and Windows\System\ directories
under the following names:
The virus also modifies Windows Registry to make these files be
executed on every further Windows bootup:
Load Mgadeskdll = C:\WINDOWS\SYSTEM\Mgadeskdll.exe
Load Rsrcload = C:\WINDOWS\Rsrcload.exe
Load Csmctrl32 = C:\WINDOWS\SYSTEM\Csmctrl32.exe
DeTroie has been reported several times in the wild in France.