Dear Colleague,
Please be informed that if you received email as sample below, please do not open the attached file.
As for the attached file may look like excel & text file but actually it was an execute file that will install virus or spyware to the computer.
To define this kind of email is simple:
1. the sender is not recognized and the email content was simple or meaningless.
2. This kind of email will have some keyword to remind recipient to/must open the attached file and to open it was important to recipient.
3. This kind of email mostly show as reply or forward but you cannot find the previous email record below this email.