Raspberry Robin Worm Evolves to Attack Financial and Insurance Sectors in Europe

Economical and insurance coverage sectors in Europe have been focused by the Raspberry Robin worm, as the malware proceeds to evolve its submit-exploitation capabilities although remaining underneath the radar.

“What is one of a kind about the malware is that it is heavily obfuscated and hugely complex to statically disassemble,” Security Joes reported in a new report revealed Monday.

The intrusions, noticed from Spanish and Portuguese-speaking businesses, are notable for amassing a lot more sufferer equipment information than previously documented, with the malware now exhibiting sophisticated procedures to resist evaluation.

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Raspberry Robin, also termed QNAP worm, is becoming utilized by a number of menace actors as a signifies to achieve a foothold into target networks. Unfold by using contaminated USB drives and other procedures, the framework has been recently place to use in attacks aimed at telecom and government sectors.

Microsoft is tracking the operators of Raspberry Robin below the moniker DEV-0856.

Security Joes’ forensic investigation into 1 such attack has uncovered the use of a 7-Zip file, which is downloaded from the victim’s browser by using social engineering and is made up of an MSI installer file intended to drop a number of modules.

In an additional instance, a ZIP file is explained to have been downloaded by the victim through a fraudulent advertisement hosted on a domain which is identified to distribute adware.

The archive file, saved in a Discord server, contains encoded JavaScript code that, on execution, drops a downloader which is guarded with numerous layers of obfuscation and encryption to evade detection.

The shellcode downloader is generally engineered to fetch more executables, but it has also observed important updates that enables it to profile its victims to deliver correct payloads, in some circumstances even resorting to a type of trickery by serving bogus malware.

This requires collecting the host’s Universally Special Identifier (UUID), processor identify, connected display screen devices, and the range of minutes that have elapsed considering that process startup, along with the hostname and username details that was gathered by more mature versions of the malware.

The reconnaissance knowledge is then encrypted using a hard-coded important and transmitted to a command-and-handle (C2) server, which responds back again with a Windows binary that is then executed on the machine.

“Not only did we explore a model of the malware that is various situations far more complex, but we also found that the C2 beaconing, which utilized to have a URL with a plaintext username and hostname, now has a sturdy RC4 encrypted payload,” menace researcher Felipe Duarte stated.

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