The U.S. Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) has issued a warning about an active “spear phishing” campaign targeting companies in the natural gas pipeline sector. The Christian Science Monitor was the first to report the attacks, quoted unidentified sources as saying that the Department of Homeland Security (DHS) has so far released at least three confidential “amber” alerts warning gas pipeline companies about the attacks. The real danger with such attacks is that they are highly targeted and persistent in nature, expert says.”]