Excel-ent Adventure: The Return of Steganography in Malicious Sheets!
Steganography is making a cheeky comeback! Even with stricter Microsoft macro rules, crafty attackers hide malicious payloads in images, like the dastardly blcopy.xls. This Excel sheet sneaks malware into your system, using steganography to hide a Katz stealer within an innocent-looking picture. Keep your eyes peeled for these pixelated pranks!
Hot Take:
Who knew Excel could be so crafty? Turns out, it’s not just for boring spreadsheets but also for sneaky cyber shenanigans! In the world of cybersecurity, even innocent-looking Excel files can pack a steganographic punch, hiding malicious payloads where you’d least expect them. Who needs James Bond gadgets when you have macros and hidden images?
Key Points:
- Steganography is being employed in malicious Excel files to hide payloads.
- Microsoft has updated its macro execution rules, but Office documents can still execute malicious code.
- The identified malicious Excel sheet, ‘blcopy.xls’, contains several embedded XLS sheets.
- The attack chain involves downloading and executing a series of scripts and files.
- Steganography is used to hide a Base64-encoded payload in an image file.
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