This phishing attack uses some very retro technology to hide its payload

Maria J. Danford

A new phishing attack has been found producing use of a form of conversation that is far more typically connected with 19th-century radio alerts than fashionable cyberattacks: Morse code. The campaign utilizes Morse code to permit destructive login types to escape detection by anti-phishing e-mail software package.  

As with several phishing strategies, this one begins with a spam e-mail purportedly made up of a payment invoice. Connected to the e-mail is an HTML file that is made to appear like an Excel spreadsheet. Commonly, the file ends: “_xlsx.html.”

When investigating this attachment even further using a text editor, it will become obvious that it features JavaScript entries that correlate letters and numbers to Morse code. The script then implements a decodeMorse() purpose to translate the Morse code into a hexadecimal string, and subsequently JavaScript tags, that are injected into the connected HTML web site.

Credential theft

All of the aforementioned techniques are mostly a way for the risk actors to evade detection. As soon as the injected scripts, including the Morse code, arrive with each other they launch a fake Excel spreadsheet that prompts the victim to enter their Business office 365 credentials. This, of class, is basically a method for attackers to steal an individual’s username and password.

It appears that this campaign is a specific one, with precise organizations currently being attacked. Bleeping Laptop experiences that companies including Dimensional, Money Four, Dea Money, and quite a few other people are amid people to have been despatched destructive email messages connected with this distinct phishing risk.

As e-mail protection tools come to be ever more complex at protecting against phishing email messages from currently being delivered, risk actors are responding with intricate methods of keeping away from detection. It will be exciting to see no matter if this Morse code endeavor gains traction amid other cyberattackers.

By way of Bleeping Laptop

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