Operaの暗号認証を偽って感染させるマルウェア

下記の記事が出ている。

　Attackers sign malware using crypto certificate stolen from Opera Software
　ars technica: June 27, 2013
　http://arstechnica.com/security/2013/06/attackers-sign-malware-using-crypto-certificate-stolen-from-opera-software/

　Opera breached, has code cert stolen, possibly spreads malware - advice on what to do
　Naked Security: June 27, 2013
　http://nakedsecurity.sophos.com/2013/06/27/opera-breached-certificate-stolen/