According to Graham Cluley, senior technology consultant with Sophos, the emails have the subject line `Your Intuit Online Payroll Free Trial’, but attached to the messages is a ZIP file containing a malicious trojan called Troj/Agent-TZG.
The email, says Cluley, looks convincing enough, and you can understand how some individuals and small businesses might feel tempted to learn more about the offer which they believe has been sent to them.
“However, the attached ZIP file (which is 196,096 bytes in size) contains a malicious file called `Intuit Online Payroll Free Trial Detailed information.exe’, which is designed to compromise the recipient's computer”, he notes in his latest security posting.
Cluley goes on to say that the emails are not really from Intuit - they are innocent casualties of the attack (their brand is being tarnished).
Similarly, he notes, internet users who open the file attached to the malicious spam are at risk of falling victim to a malware infection.