Malware Campaign Impersonates VC Firm Looking To Buy Sites

BleepingComputer was recently contacted by an alleged "venture capitalist" firm that wanted to invest or purchase our site. However, as we later discovered, this was a malicious campaign designed to install malware that provides remote access to our devices. Lawrence Abrams from BleepingComputer writes: Last week, BleepingComputer received an email to our contact form from an IP address belonging to a United Kingdom virtual server company. Writing about cybersecurity for so long, I am paranoid regarding email, messaging, and visiting unknown websites. So, I immediately grew suspicious of the email, fired up a virtual machine and VPN, and did a search for Vuxner. Google showed only a few results for 'Vuxner,' with one being for a well-designed and legitimate-looking vuxner[.]com, a site promoting "Vuxner Chat -- Next level of privacy with free instant messaging." As this appeared to be the "Vuxner chat" the threat actors referenced in their email, BleepingComputer attempted to download it and run it on a virtual machine. BleepingComputer found that the VuxnerChat.exe download [VirusTotal] actually installs the "Trillian" messaging app and then downloads further malware onto the computer after Trillian finishes installing. As this type of campaign looked similar to other campaigns that have pushed remote access and password-stealing trojans in the past, BleepingComputer reached out to cybersecurity firm Cluster25 who has previously helped BleepingComputer diagnose similar malware attacks in the past. Cluster25 researchers explain in a report coordinated with BleepingComputer that the Vuxner[.]com is hosted behind Cloudflare, however they could still determine hosting server's actual address at 86.104.15[.]123. The researchers state that the Vuxner Chat program is being used as a decoy for installing a remote desktop software known as RuRAT, which is used as a remote access trojan. Once a user installs the Vuxner Trillian client and exits the installer, it will download and execute a Setup.exe executable [VirusTotal] from https://vuxner[.]com/setup.exe. When done, the victim will be left with a C:\swrbldin folder filled with a variety of batch files, VBS scripts, and other files used to install RuRAT on the device. Cluster25 told BleepingComputer that the threat actors are using this attack to gain initial access to a device and then take control over the host. Once they control the host, they can search for credentials and sensitive data or use the device as a launchpad to spread laterally in a network.

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