Researchers at Morphisec has recently discovered a trojan malware campaign targeted at stealing information from businesses and higher education. Reportedly, the malware named Jupyter has been used by Russian speaking hackers to gather data from various software.
Primarily targeting Google Chrome, Mozilla Firefox, and Chromium code in itself, Jupyter's attack chain, delivery, and loader demonstrate additional capabilities such as a C2 client, execution of PowerShell scripts and commands, hollowing shellcode into legitimate windows configuration applications, for full backdoor functionality.
The infostealer's attack begins with a zip file containing an installer which typically impersonates legitimate software like Docx2Rtf. When the installer is executed, a .NET C2 client is inserted into memory. Jupyter loader has a well-defined protocol, persistence modules, and versioning matrix, it furthers with downloading the next stage, a PowerShell command to execute the Jupyter injected in memory earlier. Now using the commonalities between both the .Net components an end-to-end framework is developed for the implementation of the Jupyter infostealer as both have similar code, obfuscation, and unique UID implementation.
As per the analysis published by Morphisec, "Jupyter is an infostealer that primarily targets Chromium, Firefox, and Chrome browser data. However, its attack chain, delivery, and loader demonstrate additional capabilities for full backdoor functionality.”
"Morphisec has monitored a steady stream of forensic data to trace multiple versions of Jupyter starting in May 2020. While many of the C2s are no longer active, they consistently mapped to Russia when we were able to identify them," read the report.
Over the last 6 months, these installers have given exceptional results at bypassing security scanning controls, some among these installers even maintai ..
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