Complex.bin -
dd if=complex.bin of=payload.bin bs=1 skip=64 count=1024 Assume complex.bin has the following layout (common pattern):
| Offset | Size (bytes) | Field | Description | |--------|--------------|-------|-------------| | 0x00 | 4 | Magic | 0x434F4D50 ("COMP") | | 0x04 | 4 | Version | e.g., 0x00010001 | | 0x08 | 4 | Header CRC32 | | | 0x0C | 4 | Data offset | from start of file | | 0x10 | 4 | Data length | | | 0x14 | 4 | Flags | bit 0 = encrypted, bit 1 = compressed | | 0x18 | 8 | Reserved | | | 0x20 | variable | Payload | | import struct with open("complex.bin", "rb") as f: header = f.read(0x20) magic, ver, crc, data_off, data_len, flags = struct.unpack("<IIIIII", header[:24]) complex.bin
# Heuristic: try to find 'COMP' magic idx = raw.find(b'COMP') if idx == -1: print("No COMP magic found. Assuming raw payload.") return raw dd if=complex
#!/usr/bin/env python3 import sys, struct, zlib, binascii def parse_complex_bin(path): with open(path, "rb") as f: raw = f.read() flags = struct.unpack("<
payload = raw[d_off:d_off+d_len] # Check zlib header if payload[0] == 0x78 and payload[1] in (0x01, 0x9C, 0xDA): print("Detected zlib compression, decompressing...") payload = zlib.decompress(payload)
