That ’ s what two security researchers are warning , after finding a Mac-based malware that may be an attempt by Iranian hackers to target the U.S. defense industry . The fake site was previously used in a spear phishing email attack Attack.Phishing to spread Windows malware and is believed to be maintained by Iranian hackers , the researchers claimed . Visitors to the site are greeted with a page about free programs and courses for employees of U.S. defense companies Lockheed Martin , Raytheon , and Boeing . The malware itself can be downloaded from an Adobe Flash installer for a video embedded in the site . The MacDownloader malware was designed to profile the victim 's computer , and then steal Attack.Databreach credentials by generating fake system login boxes and harvesting Attack.Databreach them from Apple 's password management system , Keychain . However , the malware is of shoddy quality and is `` potentially a first attempt from an amateur developer , '' the researchers said .