Cyberespionage group launches sophisticated phishing attacks against Outlook Web App users

A cyberespionage group has been using advanced spear-phishing techniques to steal email log-in credentials from the employees of military agencies, embassies, defense contractors and international media outlets that use Office 365’s Outlook Web App.

The group behind the attack campaign has been operating since at least 2007 according to researchers from Trend Micro, who published a research paper on Wednesday about the attacks they dubbed Operation Pawn Storm.

The Pawn Storm attackers have used a variety of techniques over the years to compromise their targets, including spear-phishing emails with malicious Microsoft Office attachments that installed a backdoor-type malware program called SEDNIT or Sofacy, or selective exploits injected into compromised legitimate websites.

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