Unpacker ((top)): Enigma Protector 5x

Chronicle: Enigma Protector 5.x Unpacker

Phase 3: Dumping and IAT Rebuilding

Once execution lands at the OEP, you cannot simply dump the memory. Enigma 5.x uses stolen bytes and redirected imports.

• Dump at OEP: Use x64dbg's scylla plugin. Dump the full memory region (not just main).
• IAT Autosearch: In Scylla, click IAT Autosearch -> Get Imports. Enigma will show invalid, high-entropy addresses. You must manually trace each API call.
• Tracing API Calls: In the dumped code, any call like call dword ptr [0x12345678] likely points to a thunk. Follow that thunk—it will contain a jmp dword ptr [0xABCDEF00]. That final address should point into system DLLs. Log all such addresses and rebuild the IAT.
• Fix OEP Bytes: Enigma sometimes steals the first 10-20 bytes of the original code (e.g., push ebp / mov ebp, esp). These bytes are stored encrypted in the protector's section. Use a memory breakpoint on the OEP's first byte to trace back where they are written, then copy-paste them.

Step 6 – Fix Sections and Relocations

Enigma may compress or encrypt original sections. After unpacking, you must restore section names (.text, .rdata, .data) and recalculate VirtualSize and RawSize. For DLLs, the relocation table must be repaired or removed. enigma protector 5x unpacker

Common Challenges with Enigma 5.x