The file size, at 9,216 bytes, was for its time the largest virus ever discovered.
[citation needed] After the file becomes resident in the system memory below the 640K DOS boundary, system slow-down occurs as a result of the virus' polymorphic code.
[citation needed] Symptoms include video flicker and output to screen appearing very slowly.
It was reported that one infected program displayed the following message when run:
I AM '~knzyvo}' IN HAMBURG addr error D9EB,02 Shifting the letters of "~knzyvo}" left in the ASCII table by 10 characters turns the string into "tadpoles".