Researchers have reported that the hacker group is using Windows error reports to spread malware.
OceanLotus is Vietnamese group which is using a new fileless attack method that exploits the Microsoft Windows Error Reporting (WER) service for injecting its payload. The group has been involved in various other malicious campaigns like PhantomLance, OSX_OCEANLOTUS.D and Toyota motors breach.
OceanLotus also used a phishing attack to lure victims through a similar worker compensation claim scam. The current attack vector mainly relies on malware hidden in WER-based executable files to evade detection.
The team found a phishing document packages in a .ZIP file. This file was titled “Compensation manual.doc,” which supposedly contained information about worker compensation rights. The truth of the file is that it is a malicious macro used by hackers.
As per the researchers, the WerFault.exe reporting service is invoked when an error in the OS, Windows features, or application occurs. When a user notices WerFault.exe running on their system, they assume that an error has happened but in reality, they have become victims of a targeted attack.
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