Strings are still encrypted. Look for calls like Class1.smethod_3(byte[] data, int key). To recover them:
DeepSea, like many packers, uses pushad at the start to save the register state and popad right before jumping to the OEP to restore it. deepsea obfuscator v4 unpack
| Problem | Likely Cause | Solution |
| :--- | :--- | :--- |
| "BadImageFormatException" after dump | Missing or corrupted metadata directory | Rebuild with dotnet peverify and manual patching. |
| Strings still encrypted after decryption | Nested decryption layers (shell inside shell) | Run the dumping process twice (recursive unpacking). |
| Application crashes on startup after unpack | Anti-tampering checksum verification | NOP the Assembly.Load validation method using dnSpy patch. |
| Methods show // Token: 0x06000123 | DeepSea erased symbolic names | Manual renaming or static analysis of cross-references. | Strings are still encrypted
DeepSea Obfuscator (often associated with various .NET protections and native wrappers) is a robust protection suite designed to prevent reverse engineering, tampering, and unauthorized distribution. Version 4 represents a significant evolution in its architecture, moving away from simple import fixing and towards heavy virtualization, dynamic API resolution, and anti-dump mechanisms. DeepSea, like many packers, uses pushad at the
Unpacking a binary protected by DeepSea v4 is not a trivial "one-click" process. It requires a methodical approach involving memory forensics, dynamic analysis, and manual reconstruction of the Portable Executable (PE) headers.
This guide details the theoretical and technical process of unpacking a sample protected by DeepSea v4.