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    Treasury Optimizer is an online banking tool offered by Capital One Bank which aims to provide secure access to business accounts on the Web, 24/7. Posed to replace electronic money or more popularly known as eCash, it offers to protect customers’ accounts through security features such as multifactor authentication.

    Unfortunately, their security offerings come short, as we receive bulks of phishing emails that “promote” the Treasury Optimizer. The phishing mail instructs the client to update their account due to a potential security risk that affects all of Capital One Bank products, including the Treasury Optimizer. Here is a screenshot of the said phishing email message:

    The conventional phishing attack aims to capture users’ credentials through fake login pages spammed through email. For this attack however, the phishing link given in the phishing email leads to a page that does not ask for credentials, but tells the user to download a file instead. When the user clicks the link contained in the phishing email, the following spoofed Treasury Optimizer Web page is displayed:

    The page explains that the bank had to fix vulnerability; and in order to fix it, the client MUST download the update. It even displays different download links for different operating systems. It will then download an .EXE file that poses as an installation setup:

    The downloaded file is detected by Trend Micro as TROJ_SMALL.MAT.

    This malware-enhanced phishing attack is neither the typical type of phishing attack, nor is it less dangerous. The scope of a phishing attack is usually limited; one account from a target organization compromised in every successful attack. But this phishing attack installs a malware on the affected user’s system instead, and then uses it to monitor users’ online activities, thus possibly disclosing more information.

    The phishing URLs related to this attack are now blocked by the Smart Protection Network.

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