sydney hacker steal non-classified information australia joint strike fighter program military hardware last year breach network defense contractor defense industry minister say thursday 30 gigabytes data steal cyber attack include detail joint strike fighter warplane p-8 poseidon surveillance plane accord presentation hack government official fortunately data take commercial data military data ... classify information defence industry minister christopher pyne tell australian broadcast corporation abc radio know presentation conference sydney official australian signal directorate asd intelligence agency say technical information smart bomb joint strike fighter poseidon maritime patrol aircraft several naval vessels steal compromise extensive extreme say official mitchell clarke audio record make zdnet journalist broadcast abc clarke say attacker access small contractor systems five months 2016 methodical slow deliberate choice target suggest nation-state actor could behind raid australia agree buy 72 lockheed martin corp joint strike fighter plan spokesman australian cyber security centre acsc government agency say government would release detail cyber attack acsc say report monday respond 734 cyber attack systems national interest year end june 30 defense industry major target attack defense contractor carry malicious cyber adversary say 2016 agency say respond 1,095 cyber attack 18-month period include intrusion foreign intelligence service weather bureau joint strike fighter plan steal australia cyber attack