Some e-mail worms, like the widespread Bagle-family, uses password-protected files in an attempt to fool antivirus scanners. F-Secure Anti-Virus provides methods that can be used to detect the presence of suspicious files inside encrypted archive files. These methods provide generic detection and work for all present and future worms that uses a similar technique.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More scanning & removal options
More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
These features are disabled by default due to the fact that they may have a negative impact on the scanning performance or block some legitimate attachments in mail traffic. This article describes how a user can enable these features and ensure that worms can't replicate using password-protected archives.
More information can be found from our Support pages: