** Shares of cyber security provider AUCyber CYB.AX fall as much as 45% to A$0.11, reaching an all-time low

** Co's CEO Peter Maloney has tendered resignation

** Co has missed revenue expectations for 4 months leading to October and has withdrawn FY25 EBITDA and revenue outlook

** 871,957 shares change hands, compared with the 30-day average volume of 46,474

** Stock has fallen 64.8% this year as of last close

(Reporting by Nichiket Sunil in Bengaluru)

((Nichiket.Sunil@thomsonreuters.com))