Oyster Backdoor Malware Spread via Fake Downloads Targeting Financial Sector

Oyster Backdoor Malware Spread via Fake Downloads Targeting Financial Sector

First seen 15 Dec 2025, 16:48 UTC •Scworld •66% similarity •47.6

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Cybercriminals are distributing the Oyster backdoor malware disguised as popular office tools, including Microsoft Teams and Google Meet. This campaign, targeting individuals in the financial sector, has been active since at least mid-November 2025 and utilizes techniques such as SEO poisoning and malvertising to lure victims into downloading malicious software.

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