In a case where a malicious actor may be throwing different attack vectors against a wall to see which sticks and works best, Cisco Talos has found one group using OpenDocument files to bypass a computer’s antivirus protection.
Using Microsoft Office files as a launching point for an attack is old hat, but now Cisco Talos believes attackers are trying out slightly different formats that have a reputation for being overlooked by a computer’s defenses. OpenDocument files (.odt) are associated with Apache OpenOffice and LibreOffice.
“Whilst less people may avail of these pieces of software the actor may have a higher success rate due to low detections. The potential for specifically targeted attacks can also increase with the use of lesser used file formats,” wrote researchers Warren Mercer and Paul Rascagneres.
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