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Microsoft Office Vulnerabilities Used to Distribute FELIXROOT Backdoor in Recent Campaign

In September 2017, FireEye identified the FELIXROOT backdoor as a payload in a campaign targeting Ukrainians and reported it to our intelligence customers. The campaign involved malicious Ukrainian bank documents, which contained a macro that downloaded a FELIXROOT payload, being distributed to targets.

FireEye recently observed the same FELIXROOT backdoor being distributed as part of a newer campaign. This time, weaponized lure documents claiming to contain seminar information on environmental protection were observed exploiting known Microsoft Office vulnerabilities CVE-2017-0199 and CVE-2017-11882 to drop and execute the backdoor binary on the victim’s machine.

The malware is distributed via Russian-language documents that are weaponized with known Microsoft Office vulnerabilities. In this campaign, we observed threat actors exploiting CVE-2017-0199 and CVE-2017-11882 to distribute malware. The malicious document used is named “Seminar.rtf”. It exploits CVE-2017-0199 to download the second stage payload from 193.23.181.151. The downloaded file is weaponized with CVE-2017-11882.

Read more at FireEye

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The Government Technology & Services Coalition's Homeland Security Today (HSToday) is the premier news and information resource for the homeland security community, dedicated to elevating the discussions and insights that can support a safe and secure nation. A non-profit magazine and media platform, HSToday provides readers with the whole story, placing facts and comments in context to inform debate and drive realistic solutions to some of the nation’s most vexing security challenges.

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