msoffcrypto-tool
msoffcrypto-tool (formerly ms-offcrypto-tool) is a Python tool and library for decrypting encrypted MS Office files with password, intermediate key, or private key which generated its escrow key.
Early PoC version: https://github.com/nolze/ms-offcrypto-tool/tree/v0.1.0
Install/Uninstall
Install
pip install git+https://github.com/nolze/msoffcrypto-tool
Uninstall
pip uninstall msoffcrypto-tool
Examples
As a CLI tool (with password)
msoffcrypto-tool -p Passw0rd encrypted.docx decrypted.docx
As a library
Password and more key types are supported with library functions.
import msoffcrypto
file = msoffcrypto.OfficeFile(open("encrypted.docx", "rb"))
# Use password
file.load_key(password="Passw0rd")
# Use private key
# file.load_key(private_key=open("priv.pem", "rb"))
# Use intermediate key (secretKey)
# file.load_key(secret_key=binascii.unhexlify("AE8C36E68B4BB9EA46E5544A5FDB6693875B2FDE1507CBC65C8BCF99E25C2562"))
file.decrypt(open("decrypted.docx", "wb"))
Supported encryption methods
- ECMA-376
- MS-DOCX (OOXML) (Word 2007-2016)
- MS-XLSX (OOXML) (Excel 2007-2016)
- Office Binary Document RC4
- MS-DOC (Word 97-2004)
- MS-XLS (Excel 97-2004)
- Office Binary Document RC4 CryptoAPI
- XOR Obfuscation
- Word 95 Encryption
PRs welcome!
Todo
- Add tests
- Support decryption with passwords
- Support older encryption schemes
- Add function-level tests
- Add API documents
- Publish to PyPI
- Add decryption tests for various file formats
- Merge to more comprehensive projects handling MS Office files (such as oletools?) if possible
References
- "Backdooring MS Office documents with secret master keys" http://secuinside.com/archive/2015/2015-1-9.pdf
- [MS-OFFCRYPTO] Agile Encryption https://msdn.microsoft.com/en-us/library/dd949735(v=office.12).aspx
- LibreOffice/core https://github.com/LibreOffice/core
- LibreOffice/mso-dumper https://github.com/LibreOffice/mso-dumper
- wvDecrypt http://www.skynet.ie/~caolan/Packages/wvDecrypt.html
Alternatives
- herumi/msoffice https://github.com/herumi/msoffice
- DocRecrypt https://blogs.technet.microsoft.com/office_resource_kit/2013/01/23/now-you-can-reset-or-remove-a-password-from-a-word-excel-or-powerpoint-filewith-office-2013/
Use cases and mentions
1 maintainer
Release files for msoffcrypto-tool 4.1.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| msoffcrypto-tool-4.1.2.tar.gz | 8.9 kB | Details |
Release files / msoffcrypto-tool-4.1.2.tar.gz
| Download URL | msoffcrypto-tool-4.1.2.tar.gz |
|---|---|
| Size | 8.9 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
e5c2bd71f196bf6b0a6c4a8c84fac59d1b0c78d20cbe7ab607eedde4962634ad
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| Upload date | |
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