Jan 18, 2023Ravie LakshmananCyber Threat / Malware

An ongoing campaign dubbed Earth Bogle is leveraging geopolitical-themed lures to deliver the NjRAT remote access trojan to victims across the Middle East and North Africa.

“The threat actor uses public cloud storage services such as files[.]fm and failiem[.]lv to host malware, while compromised web servers distribute NjRAT,” Trend Micro said in a report published Wednesday.

Phishing emails, typically tailored to the victim’s interests, are loaded with malicious attachments to activate the infection routine. This takes the form of a Microsoft Cabinet (CAB) archive file containing a Visual Basic Script dropper to deploy the next-stage payload.

Alternatively, it’s suspected that the files are distributed via social media platforms such as Facebook and Discord, in some cases even creating bogus accounts to serve ads on pages impersonating legitimate news outlets.

The CAB files, hosted on cloud storage services, also masquerade as sensitive voice recordings to entice the victim into opening the archives, only for the VBScript to be executed, leading to the retrieval of another VBScript file that masks itself as an image file.

NjRAT Trojan

The second-stage VBScript, for its part, fetches from an already breached domain a PowerShell script that’s responsible for loading the RAT payload into memory and executing it.

NjRAT (aka Bladabindi), first discovered in 2013, has myriad capabilities that allow the threat actor to harvest sensitive information and gain control over compromised computers.

“This case demonstrates that threat actors will leverage public cloud storage as malware file servers, combined with social engineering techniques appealing to people’s sentiments such as regional geopolitical themes as lures, to infect targeted populations,” the researchers concluded.

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