This is the Trend Micro detection for email files that contain an attachment which when quarantined and restored is detected as PE_CHIR.B-O.
It takes advantage of the following vulnerability affecting systems running Microsoft Internet Explorer 5.01 and 5.5:
- Incorrect MIME Header Can Cause IE to Execute Email Attachment
The said vulnerability allows the automatic execution of email attachments without the user’s consent. For more information, visit the following Microsoft Web page: