from __future__ import print_function
import argparse
from datetime import datetime
from pefile import PE

"""
MIT License

Copyright (c) 2017 Chapin Bryce, Preston Miller

Please share comments and questions at:
    https://github.com/PythonForensics/PythonForensicsCookbook
    or email pyforcookbook@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""

__authors__ = ["Chapin Bryce", "Preston Miller"]
__date__ = 20170815
__description__ = "Utility to extract metadata from EXE files"

parser = argparse.ArgumentParser(
    description=__description__,
    epilog="Developed by {} on {}".format(
        ", ".join(__authors__), __date__)
)
parser.add_argument("EXE_FILE", help="Path to exe file")
parser.add_argument("-v", "--verbose", help="Increase verbosity of output",
                    action='store_true', default=False)
args = parser.parse_args()

pe = PE(args.EXE_FILE)
ped = pe.dump_dict()

file_info = {}
for structure in pe.FileInfo:
    if structure.Key == b'StringFileInfo':
        for s_table in structure.StringTable:
            for key, value in s_table.entries.items():
                if value is None or len(value) == 0:
                    value = "Unknown"
                file_info[key] = value
print("File Information: ")
print("==================")
for k, v in file_info.items():
    if isinstance(k, bytes):
        k = k.decode()
    if isinstance(v, bytes):
        v = v.decode()
    print("{}: {}".format(k, v))

# Compile time
comp_time = ped['FILE_HEADER']['TimeDateStamp']['Value']
comp_time = comp_time.split("[")[-1].strip("]")
time_stamp, timezone = comp_time.rsplit(" ", 1)
comp_time = datetime.strptime(time_stamp, "%a %b %d %H:%M:%S %Y")
print("Compiled on {} {}".format(comp_time, timezone.strip()))

# Extract IOCs from PE Sections
print("\nSections: ")
print("==========")
for section in ped['PE Sections']:
    print("Section '{}' at {}: {}/{} {}".format(
        section['Name']['Value'], hex(section['VirtualAddress']['Value']),
        section['Misc_VirtualSize']['Value'],
        section['SizeOfRawData']['Value'], section['MD5'])
    )

# Display Imports, Names, and Addresses
if hasattr(pe, 'DIRECTORY_ENTRY_IMPORT'):
    print("\nImports: ")
    print("=========")
    for dir_entry in pe.DIRECTORY_ENTRY_IMPORT:
        dll = dir_entry.dll
        if not args.verbose:
            print(dll.decode(), end=", ")
            continue

        name_list = []
        for impts in dir_entry.imports:
            if getattr(impts, "name", b"Unknown") is None:
                name = b"Unknown"
            else:
                name = getattr(impts, "name", b"Unknown")
            name_list.append([name.decode(), hex(impts.address)])
        name_fmt = ["{} ({})".format(x[0], x[1]) for x in name_list]
        print('- {}: {}'.format(dll.decode(), ", ".join(name_fmt)))
    if not args.verbose:
        print()

# Display Exports, Names, and Addresses
if hasattr(pe, 'DIRECTORY_ENTRY_EXPORT'):
    print("\nExports: ")
    print("=========")
    for sym in pe.DIRECTORY_ENTRY_EXPORT.symbols:
        print('- {}: {}'.format(sym.name.decode(), hex(sym.address)))