9/19/2023 0 Comments Takenote outlook![]() ![]() Deploying application control, thereby blocking unsigned EXEs from being executed.Additionally, the research highlighted various remedial actions that could be taken to reduce the chance of attack, such as: WithSecure Elements' EPP and EDR components use a variety of detections to identify malicious activity associated with OneNote attachments. png extension, thereby hiding the real file type which is in this case an. The file won't be written to disk or executed until the user clicks "ok" on the "do you want to proceed" message.Īttackers can make their malicious file look like a harmless image by adding a fake. Even official-looking warning signs can catch you outįor example, when double-clicking an attachment, OneNote can display a warning message that the attachment may not be safe. In particular, was the ease of attaching files in existing OneNote notebooks that victims can execute with little warning.Īmong the use cases WithSecure researchers focused on where OneNote could be exploited were instances where attackers can embed executables in OneNote sections and then lure users into executing them with various pretexts. OneNote as an attack vector has been getting more attention largely due to a research paper published in mid-2022 which outlined various potentially interesting characteristics for attackers. As it is installed by default in all Microsoft Office/365 installations, it can still be used to open file formats, even if the application itself is not used. Microsoft OneNote is part of the Microsoft Office suite and is commonly used within most organizations for note-keeping and task management. The adoption of using OneNote attachments for malicious purposes comes after Microsoft recently initiated a series of measures to thwart attackers in their attempts to distribute malware via malicious Word and Excel attachments – something they have been doing for several years. one files are not part of Microsoft's Outlook attachment blacklist, makes. Jojo O'Gorman and Riccardo Ancarani from WithSecure Labs have just published research outlining the simulation (and controlled detonation) of various abuse cases associated with the OneNote file formats and giving practical advice for preventing and detecting the attack.īased on the controlled experiments, it was concluded (at the time of writing) that several security solutions were not correctly parsing OneNote files. ![]()
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