The vulnerability was detected by FireEye researchers. The attacker used Microsoft Office RTF document to leverage RCE in .NET Framework and deploy FINSPY malware. The malicious document “Проект.doc” (MD5: fe5c4d6bb78e170abf5cf3741868ea4c) had Russian name and might have been used to target a Russian speaker.
A backdoor code was detected in NetSarang software on August 4, 2017. Next day, on August 5 the developer has released an update to resolve the issue. As of August 15, there is an evidence, that the code has being utilized by one instance in Hong Kong.
The malicious code was delivered to the vendor's clients by compromising the software update mechanism. The backdoor was included into updates, issued on July 18, 2017. The update contained ShadowPad backdoor.
The browser extension for Google Chrome has been hijacked on Google Web Store.
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