By Allyn Fisher-Ilan and Jim Finkle JERUSALEM/BOSTON (Reuters) – Hackers broke into an Israeli defense ministry computer via an email attachment tainted with malicious software that looked like it had been sent by the country’s Shin Bet secret security service, an Israeli cyber security firm said on Sunday. Aviv Raff, chief technology officer at Seculert, said the hackers earlier this month temporarily took over 15 computers, one of them belonging to Israel’s Civil Administration that monitors Palestinians in Israeli-occupied territory. Raff told Reuters that Palestinians were suspected to be behind the cyber attack, citing similarities to a cyber assault on Israeli computers waged more than a year ago from a server in the Hamas-ruled Gaza Strip. Israeli officials declined to comment on Raff’s findings.