Phishing-trojans are document files that are specially-crafted to look legitimate, but serve as delivery vehicles for harmful programs. If the file is opened, embedded code will either drop and install a harmful program onto the user's device, or will download additional harmful components from a remote site to install.
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
Security programs will sometimes unintentionally identify a clean program or file as malicious if its code or behavior is similar to a known harmful program or file. This is known as a False Positive. In most cases, a False Positive is fixed in a subsequent database release.
Usually, updating your F-Secure security product to use the latest database is enough to resolve the issue. You can check by first updating your F-Secure security product to use the latest detection database updates, then rescanning the file.
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it to F-Secure Labs for re-analysis.
NOTE If the file was moved to quarantine, you will need to first collect the file from quarantine before you can submit it.
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Find the latest advice in our Community Knowledge Base.
See the manual for your F-Secure product on the Help Center.
Submit a file or URL for further analysis.
The email messages used to deliver phishing-trojans are typically designed to look like normal business communications, often related to taxes, invoicing, deliveries, salaries or other work-related matters. They may also use the branding or names of legitimate companies to further the impression of authenticity. Such messages are also known as phishing emails.
The attached files are most frequently Microsoft Office documents (Word, Excel, etc), though PDF, HTML or ZIP files are also common. The files usually use fairly innocuous file names, such as 'Invoice', or 'Delivery statement'. to give the impression that they are legitimate.
The careful crafting of the email message and file attachments to appear authentic are all examples of social engineering.
If the user opens the file, most will also display an authentic-looking document as a decoy, to distract the user from any unauthorized actions that occur in the background.
If the file is a Microsoft Office document, and the user's Office settings disable macros by default, a notification message may be displayed asking the user to enable macros, supposedly so that they can view the document contents correctly. In reality, doing so would allow the malicious code embedded in the document to run and install malware on the device.
If the attached file is opened, code embedded in it will run and either:
The specific harmful program installed onto the device varies, and may be separately detected by security products.