Credential Phishing Campaigns Exploiting E-Signature and Note-Sharing Platforms
A widespread phishing campaign has targeted over 6,000 organizations across multiple sectors by impersonating trusted digital document platforms such as SharePoint and DocuSign. Attackers crafted emails that closely mimicked legitimate notifications, using authentic-looking subject lines, formatting, and logos to deceive recipients. The phishing links were obfuscated through services like Mimecast, Bitdefender, and Intercom, making them appear trustworthy and bypassing security filters. The primary objective was to lure users into credential theft pages, with industries such as consulting, tech, real estate, healthcare, and government being heavily targeted due to their reliance on document exchanges.
In a related tactic, threat actors have begun abusing the NoteGPT platform, an AI-powered note-sharing service, to host malicious files and further disguise phishing attempts. Victims receive emails that appear to be secure document notifications from familiar brands like Microsoft OneDrive, but the links redirect to NoteGPT-hosted phishing pages. These emails often spoof legitimate company addresses and use plain, routine subject lines to avoid suspicion. Once users attempt to access the fake documents, they are prompted to enter their credentials, which are then harvested by the attackers. Both campaigns highlight the increasing sophistication of phishing operations leveraging trusted platforms and services to evade detection and compromise professional accounts.
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