#WatchOut- Fake WHO Safety Emails on COVID-19 Dropping Nerbian RAT Across Europe

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The novel Nerbian RAT (Remote Access Trojan) currently targets companies in Spain, Italy and the United Kingdom. Proofpoint security researchers are alerting UK, Italian, and Spanish companies about a new RAT called Nerbian written in the Go programming language. The name of the  

  malware  is based on the code that refers to the name of the fictitious location in the novel Don Quixote. 

 "Operating System & # 40; OS & # 41; is an incomprehensible Go programming language compiled for 64-bit systems that uses multiple cryptographic routines to further bypass network analysis," researched. Is writing. The 

  RAT can log keystrokes, execute arbitrary commands, take screenshots and steal data to a remote C2 server. The threat actors behind this campaign are still unknown.

How is Nerbian RAT Distributed?

Nerbian RAT is shipped via a phishing marketing campaign the use of faux COVID-19 topic emails. The emails are much less than one hundred in variety and are disguised to be dispatched with the aid of using the World Health Organization concerning COVID-19 associated protection measures. 

 Furthermore, sufferers are endorsed to open a macro-laced MS Word record to obtain the modern fitness recommendation from the organization. Researchers in addition referred to that the marketing campaign has been lively given that 26 April 2022. 

 When the macros are enabled, a COVID-19 manual appears, informing the sufferer approximately self-isolation steps. However, withinside the background, the embedded macro commences an contamination chain. 

 This chain, in step with Proof-point`s weblog post, delivers, the UpdateUAV.exe payload, “a 64-bit executable, written in Golang, 3.5MB in size, and UPX packed,” researchers explained. 

 This report serves as a Nerbian dropper dispatched with the aid of using a far flung server. Research famous that the identical writer designed the dropper and malware and that the dropper also can supply extraordinary payloads in destiny campaigns.

Fake WHO email laced with Nerbian RAT (Credit: Proofpoint)

Nerbian loaded with Anti-Analysis Elements

Researchers at Proofpoint pointed out that this newly identified RAT contains "multiple analysis prevention" components that work at various stages, such as  numerous open source libraries. The 

  UpdateUAV.exe dropper uses the open source antiV framework Chacal to complicate reverse engineering and exit itself when it performs reverse engineering or  detects a debugger or memory analyzer.

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