Before we begin the unpacking, let’s address why tools like de4dot (even the latest forks) struggle with v4:
To successfully unpack, we must intercept the decrypted assembly before the anti-dump routine purges it. deepsea obfuscator v4 unpack
The crown jewel of DeepSea v4 is the virtual machine. Selected methods are compiled into bytecode for a custom stack-based VM. Before we begin the unpacking, let’s address why
Signs of virtualization:
Unpacking the VM:
Due to complexity, many analysts opt to emulate the VM instead of fully restoring the IL. For malware analysis, emulation is often sufficient. To successfully unpack, we must intercept the decrypted
The protector constantly checks the Process Environment Block (PEB) for the BeingDebugged flag.