This threat named Night Dragon was reported from Mcafee, an anti-virus SW company.
It can cause huge amount of financial damage with hitting industry facilities.
2. Spreading path and symptoms of infection
Following figures shows the process of Night Dragon security threats
McAfee reported that
"There is nothing to suggest that the developers of these tools had any direct connection to these intrusions, as the tools are widely available on the Chinese web forums and tend to be used extensively by Chinese hacker groups. Although it is possible that all of these indicators are an elaborate red-herring operation designed to pin the blame for the attacks on Chinese hackers, we believe this to be highly unlikely. Further, it is unclear who would have the motivation to go to these extraordinary lengths to place the blame for these attacks on someone else. We have strong evidence suggesting that the attackers were based in China."
3. How to prevent
Night Dragon can cause huge amount of financial damage after Stuxnet. Continuous appearance of security threats can threaten industry facilities.
To use PC safely from security threats of these malicious attachments, we recommend following "Security management tips" for general users.
INCA Internet (Security Response Center / Emergency Response Team) provides diagnosis/treatment function with nProtect Anti-Virus/Spyware for detecting such as malicious file stated above and runs responding system against various security threats.