Pieck is a stealth virus, so changes made to MBR and EXE files are not
visible as long as the virus is resident.
Pieck activates on third of March, every year. At this date, it
decrypt and display this message:
Podaj haslo ?
Which means "Password?". The correct password is 'PIECK'. If an
incorrect answer is given, the virus displays 'Blad!' (which means
'Bad!') and makes the machine unbootable. Correct password is
greeted with a new message:
Pozdrowienia dla wynchowankow Pieck'a.
('Greetings to "wychowankow" Pieck').
Pieck was known to be in the wild in Eastern Europe in 1995 and in
Germany in early 1996.