berlin top german intelligence officials thursday urge lawmakers give great legal authority hack back event cyber attack foreign power hans-georg maassen head bfv domestic intelligence agency tell parliamentary oversight committee possible destroy data steal german servers move foreign servers prevent misuse say would also make sense infect foreign servers software would enable great surveillance operations direct german cyber target extract data much human agents recruit counter-espionage real world would like turn foreign intelligence agent get work us ... something like possible cyber world maassen tell committee first public hear hack back instrument threshold destroy incapacitate foreign server maassen say german officials blame apt28 russian hacker group say link moscow may 2015 hack german low house parliament bundestag cyber attack aim political group individuals institutions issue repeat warn possibility moscow could seek influence disrupt sept. 24 german election although officials since say see major push russia maassen say possible russia decide political cost great backlash ensue unite state similar effort russia deny seek influence foreign elections germany bnd foreign intelligence agency already expertise legal authority destroy foreign servers chief bruno kahl tell committee source attack carefully investigate identify could make sense shut source attack retreat give job go back take care business kahl say end however decisions make politicians kahl say christof gramm head germany mad military counter-espionage agency say question domestic international law address empower agencies take action work international boundaries talk national law gramm tell committee near end three-hour session say power grant would military cyber command carry action mad maassen say authorities need access stream data foreign servers instance videos show behead track radicalization possible islamist attackers also call broad power track communications germany raqqa syrian city still islamic state control note current law allow track individual communications broad flow german spy agencies want right destroy steal data 'hack back