Enigma is a non-resident infector of .EXE files. Despite it's name, it is not related to the antivirus company of the same name.
When a program infected with Enigma is executed, one .EXE program in the current directory will be infected by the virus. Infected .EXE programs will increase in length by 1,755 bytes. The virus will be located at the end of infected programs. Infected programs will also contain the following text strings:
This is the voice of the Enigma virus...... the spirits of the hell are coming back! (C) 1991 by Cracker Jack * Italy * *.exe newenigmavir
It is not known if Enigma does anything besides replicate.
Delete the infected files.