One version of EtterSilent uses a Macro-based exploit and is designed to look like DocuSign, the popular software program that allows individuals or businesses to electronically sign documents. (“File:DocuSignHeadquarters.jpg” by Coolcaesar is licensed under CC BY-SA 4.0)
Researchers at Intel471 have identified a new malicious document builder that has gone from a new, relatively unknown exploit to being incorporated into the attack chains of top cybercriminal groups in less than a year.
The builder, dubbed EtterSilent, comes in two flavors: one version exploits an old remote code execution vulnerability in Microsoft Office and another uses a Macro-based exploit and is designed to look like DocuSign, a popular software program that allows individuals or businesses to electronically sign documents.
Researchers at Intel471 first observed the builder being advertised on Russian online cybercriminal forums in June 202 ..
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