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Extracting Sodinokibi Configuration

During my analysis of a Sodinokibi sample, I discovered that the malware opens up a console window and write debug messages as well as write the [DBG] messages on the text file called "DBG_LOG.txt". 



Sodinokibi is known to exploit several critical vulnerabilities, including Oracle WebLogic server (CVE-2019-2725) and 0-day Windows vulnerability (CVE-2018-8453) to infect systems.


The malware unpacks itself multiple times by allocating virtual memory and decrypting the exploitation code:





Kernel component win32k.sys can be seen referred to, which is where the vulnerability CVE-2018-8453 exists.



Depending on the processor architecture, one of the shellcode options contains in the body is executed.

A new thread is created and by placing a on-execution hardware breakpoint, I was able to follow the thread.





Finally, I could see the decrypted configuration for the malware:


I decoded the base64 decoded blobs within the configuration and it turned out to be the ransowmare note.



The con…

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