UnpacMe is an automated malware unpacking service

Packing serves several purposes:

• It obfuscates the code, making it more challenging to discern its structure or functionality.
• It reduces the size of the executable, making it quicker to transfer or less conspicuous.
• It confounds security researchers by hindering traditional reverse engineering attempts.

If I see:

• High entropy
• Small import table
• RWX section
• Entry point not in .text
• Few sections

→ I assume packed and move to dynamic analysis.

Identify

• Weird section names (.asdf, .vmp0, .UPX0, random strings)
• RWX Permissions (sections that are Readable + Writable + Executable)
• Huge Entropy (Normal .text ≈ 6.0–6.8 ; Packed section ≈ 7.2–8.0)
• Small Import Table (only LoadLibraryA, GetProcAddress, VirtualAlloc, VirtualProtect)
• Empty Import Table (Big red flag - Imports reconstructed at runtime/manual mapping)
• Entry Point Suspiciousness (Unpacking stub -> `pushad...popad..jmp..)

Tools

Use:

• DIE (Detect It Easy)
• PEiD
• Exeinfo PE

Sometimes they directly say:

• UPX
• VMProtect
• Themida
• ASPack