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New Spider Ransomware Emerges

A new ransomware familydiscovered when analyzinga mid-scale campaign that started over the weekend uses decoy documents auto-synced to enterprise cloud storage and collaborations apps, security researchers have say.

Dubbed Spider, the new threat was observed being distributed via an Office document supposedly targeting users in Bosnia and Herzegovina, Serbia, and Croatia. The spam emails suggest the sender is looking to collect some debt from the recipient in attempt to trick the user into opening the attached file.

Obfuscated macro code embedded in the Office document, however, launches aBase64 encryptedPowerShell script to download the malicious payload, Netskope’s Amit Malik says.

If the malware is able to successfully infect a system, it starts encrypting user’s files and adds the ‘.spider’ extension the affected files.

A decrypter was designed to display the user interface and allow users decrypt the files using a decryption key. It is executed alongside the encrypter...(continued)

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