This virus has 2 versions:
A2Space is a memory resident parasitic virus.
While installing into the system memory it infects the C:\COMMAND.COM and \COMMAND.COM files. Then it hooks INT 17h, 21h and writes itself to the end of COM and EXE files that are executed.
In July on Tuesdays and Thursdays, the virus replaces 'A' and 'a' characters with the space while printing.
The virus contains the text string :
No images or videos available