Hackers leave malicious devices connected to organization corporate network and through the device, they explore IT infrastructure, Intercept credentials, steal sensitive data and much more.

Kaspersky Security researchers investigated such a situation where the attackers leave physically connected devices in the corporate network. According to researchers at least eight Eastern Europe banks where targeted, these attacks tracked collectively as DarkVishnya.

Hackers enter into the organization Pretending as a courier, job seeker, etc and leave connecting devices such as a laptop, Raspberry Pi and Bash Bunny (multi-function USB attack tool) into organization network.

Researchers Categorized the Attack into Three Stages

First Stage – Cybercriminals enter the organization and connect the devices contains a built-in or USB-connected GPRS/3G/LTE modem to get connected with the rouge network.

Second Stage – Attackers remotely connected to the device and scan the local network to gain access to web servers and other sources through brute-force methods, sniff data, and harvest sensitive information.

The Third Stage – Once they gain access to the targeted system they install remote software to gain access to the system and they create malicious services using msfvenom on the compromised machine.

Even in companies where security issues are taken seriously, planting such a device is not impossible. Couriers, job seekers, and representatives of clients and partners are commonly allowed into offices, so malefactors can try to impersonate any of them reads Kaspersky blog post.

“The method has the potential for use against any big company. The bigger the better; it is much simpler to hide a malicious device in a large office — and especially effective if a company has many offices around the world connected to one network,” Kaspersky said.

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