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dumping-and-rebuilding-a-pe-from-memory

Rebuilds a usable PE file from a memory dump by fixing the section alignment (virtual-to-raw), correcting the entry point, and preparing for import table reconstruction. Activates for requests to rebuild a dumped PE, fix a memory-dumped executable, or convert a process dump into an analyzable file.

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설치 방법 보기

포함된 파일(4)

  • SKILL.md2.8 KB
  • LICENSE340 B
  • references/api-reference.md1.2 KB
  • scripts/analyst.py3.2 KB

SKILL.md(원문)

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Dumping and Rebuilding a PE From Memory

When to Use

  • You have a process/region dump of an unpacked or injected PE and need a file that loads in a disassembler.
  • You need to convert virtual (loaded) layout back toward raw layout and fix the entry point.

Do not use this on a still-packed image — unpack to OEP first. This skill operates on an already-captured dump; it does not execute the sample.

Prerequisites

  • A raw PE dump (e.g., from x64dbg Scylla, vaddump) and the OEP if known.

Safety & Handling

  • The dump is live malicious code; store password-protected and never execute it.

Workflow

Step 1: Inspect the dumped headers

python scripts/analyst.py inspect dump.bin

Reports whether section RawAddress/RawSize match VirtualAddress/VirtualSize (memory-aligned dumps have raw==virtual) and the current AddressOfEntryPoint.

Step 2: Realign sections to raw layout

python scripts/analyst.py fix dump.bin --oep 0x1234 -o rebuilt.bin

Rewrites each section's PointerToRawData/SizeOfRawData to its virtual layout (the on-disk-from- memory convention) and sets the entry point to the supplied OEP.

Step 3: Reconstruct imports

The dumped image usually has a destroyed IAT; rebuild it with an import reconstructor (Scylla/ ImpRec) using the OEP, then re-inspect.

Step 4: Verify

Confirm the rebuilt file parses, has a valid entry point, and disassembles.

Validation

  • Section table is internally consistent (no overlaps, within file size).
  • AddressOfEntryPoint points inside an executable section.
  • The rebuilt file is accepted by a PE parser/disassembler.

Pitfalls

  • Forgetting that memory dumps use virtual alignment — raw offsets must be rewritten.
  • Setting an OEP RVA that lies outside any section.
  • Skipping IAT reconstruction, leaving call targets pointing at null/garbage.

References

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