** Shares of cybersecurity services provider Aucyber CYB.AX rise as much as 13.5% to A$0.148

** Co receives competing takeover proposal from local business tech provider Brennan, valuing it at A$22.9 mln ($14.3 mln)

** CYB is currently considering a buyout bid by 5G Networks 5GN.AX, valuing it at A$18 mln

** 5GN is down 2.9% at A$0.165

** CYB has fallen 77.1% this year, as of last close

($1 = 1.6026 Australian dollars)

(Reporting by Rishav Chatterjee in Bengaluru)

((Rishav.Chatterjee@thomsonreuters.com;))