Www Kkmoom Com Pc Rar //top\\ -

if __name__ == '__main__': packed = open('payload.packed', 'rb').read() unpacked = decompress(packed) open('payload.bin', 'wb').write(unpacked) Running the script produces payload.bin (~13 KB). The file starts with the header again – the packer is nested : the decompressed payload is a second PE executable. 5. Second‑Stage PE – The Real Target file payload.bin # payload.bin: PE32 executable (GUI) Intel 80386, for MS Windows We repeat the same analysis steps on payload.bin . 5.1. Quick string hunt strings -a -n 5 payload.bin | grep -i flag # → No direct flag string, but we see: # "You think this is easy? Think again." 5.2. Import Table inspection r2 -A payload.bin [0x00401000]> iij # The imports are minimal: kernel32.dll (VirtualAlloc, WriteFile, ExitProcess) # No obvious network calls. 5.3. Locate the main routine The entry point ( 0x00401000 ) now points to a standard mainCRTStartup . We follow the call chain:

# Key location: [0x00401000]> s 0x00407000 [0x00407000]> pd 12 # → key = "kKMo0M_cRaZ" Extract both blobs: www kkmoom com pc rar

The goal is to retrieve the flag without resorting to brute‑force cracking or illegal cracking of any proprietary software – we only analyse the supplied binary. # 1. Create a clean analysis directory mkdir -p ~/ctf/kkmoom && cd ~/ctf/kkmoom if __name__ == '__main__': packed = open('payload

import subprocess, os, struct, sys, pathlib Second‑Stage PE – The Real Target file payload

# Entropy (use binwalk or custom script) binwalk -E pc.exe # High entropy sections → packed or encrypted payload The binary is with a custom packer. The entry point is not the usual mainCRTStartup ; it jumps to a stub that decompresses an embedded payload into memory and then executes it. 4. Static Analysis – Unpacking the Stub 4.1. Identify the packer stub Open the binary in radare2 (or Ghidra ) and locate the entry point:

0x00401000 push ebp 0x00401001 mov ebp, esp 0x00401003 sub esp, 0x200 0x00401009 call 0x00402000 ; → get current module handle 0x0040100e mov eax, dword [0x00403000] ; pointer to packed data 0x00401013 mov ecx, dword [0x00403004] ; packed size 0x00401018 mov edx, dword [0x00403008] ; uncompressed size 0x0040101d call 0x00404000 ; → custom LZ‑type decompressor 0x00401022 jmp eax ; jump to decompressed payload The decompressor resides at 0x00404000 . It is a relatively small routine (≈ 120 bytes) that implements a . 4.2. Dump the packed data The packed payload is stored as a raw byte array at RVA 0x403000 . Extract it with readelf / dd :