About 5800 byte long. If the virus is memory resident, control is returned to the host program. Otherwise, It attempts to install itself in system memory. If any found, then they are disabled for salve preservation. It uses Int 21h handler to determine the residence of DOS interrupt handler.
Control now is returned to the host program.
The virus infects COM and EXE files. When all these conditions are satisfied, the virus examines the lower five bits of the file, if they are all set to 1, then it becomes a candidate for infection. Next, the last 24 bytes are read and decoded. The virus look for its ID in this area. If the file is already infected, then control is given to a routine that runs the virus.