Oledump plugin biff 0 macro sheet is "very hidden". txt” then you get different results within cmd and powershell when redirecting the stdout from python (for example version 3. Feb 10, 2021 · This new version of oledump. - decalage2/oledump-contrib Apr 14, 2021 · Hi folks, Trying to perform systematic scan of office files sent by some customers, and facing this issue with olevba with one malware spotted by another tool. We show how existing open source tools can be utilized to carve out interesting artifacts. Feb 22, 2021 · To achieve this, I need to change some bytes in records that make up the Excel spreadsheet. Mediante el análisis del archivo Sample2 utilizando la herramienta oledump. py has a new option: –hexrecord. xlsm >my_exported_vb_file. 0. The oledump-contrib repository contains plugins and enhancements for the oledump tool published by Didier Stevens. 可以看出单元“Macro1”部分十六进制是51AA020001，这个01就是隐藏，02是深度隐藏。所以使用winhex将其改成51AA020000。 Jun 22, 2020 · By far the most complete is XLMMacroDeobfuscator by @DissectMalware but other tools such as OLEDUMP's BIFF plugin by @DidierStevens can be useful too. py brings an update to plugin plugin_biff to help with the recovery of protection passwords. Sample 1 analysis We have previously seen that we can use the command file to check the type of file. py --pluginoptions "-x" Info01. xls spreadsheets are password protected (but not encrypted). py for the demo1. py is installed. #XLMMacroDeobfuscator v0. OLEDUMP provides a number of plugins and, in particular, the plugin_biff for inspecting the binary file format of Excel 97 - 2003 documents. py with plugin plugin_biff, you can see that Xavier's malicious Excel 4. zip (https… Jan 29, 2019 · In this article, we present our in-depth analysis of a malicious Microsoft Excel document (. py -s A4 -v c:\myfile. The password is hashed to a 16-bit hash called verifier, such a short hash gives ample opportunity for hash collisions. If there are german umlauts in the vba scipts, which i try to export via for example “oledump. And in follow-up diary entry "Maldocs: Protection Passwords", I talk about an update to my oledump plugin plugin_biff. New options allow to search for opcodes (-o) and strings/bytes (-f) inside BIFF records: o… Dec 5, 2020 · This new version of oledump includes a few Python 3 fixes, and an update version of plugin_biff. Here the hashes are 41 CB and Jan 23, 2015 · Didier Stevens Videos RSS. xls”. 0 macros: oledump… Feb 19, 2021 · Affected tool: olevba v. py command with -s to select stream and -S to dump strings. Dec 22, 2014 · I tried to run the plugin_biff. The option '-x' filters results and returns only information related to the macro. Jul 11, 2024 · This is an update for plugin plugin_biff. When you use my tool oledump. Another way is to check the header of the hexdump of the file. Additionally specifying the option to dump contents as a string, one can expose the embedded URL as well: $ oledump. 0练习\Dokumentation. py demo1. 8. py to be able to run plugin_biff from olevba __description__ = 'Analyze OLE files (Compound Binary Files)' __author__ = 'Didier Stevens' May 13, 2020 · Python2 oledump. Option -x of plugin_biff will select all BIFF records relevant for the analysis of Excel 4. didierstevens. Showing how to analyze a malicious Excel document with oledump's plugin for BIFF records. bin -p plugin_biff –pluginoptions “-x” | more 1: 4096 ‘x05DocumentSummaryInformation’ 2: 236 ‘x05SummaryInformation’ 3: 159084 ‘Workbook’ oletools - python tools to analyze MS OLE2 files (Structured Storage, Compound File Binary Format) and MS Office documents, for malware analysis, forensics and debugging. Using this repo, you can submit new contributions: you may fork the project, then submit your changes using pull requests. If you want to open a malicious spreadsheet (for example with Excel 4 macros) in a sandbox, to inspect its content with Excel, chances are that it is protected. xls --pluginoptions "-o 876 -s" 1: 4096 '\x05DocumentSummaryInformation' 2: 240 '\x05SummaryInformation' 3: 101088 'Workbook' Apr 10, 2019 · Affected tool: olevba Running olevba on an xls with Excel 4 macro results in the following error: malware hash Jul 2, 2024 · plugin_biff: fixed issues #428, #434 and #444, improved Python 3 support; olevba, msodde, crypto: improved handling of encrypted files (PR #441) olevba: initialize VBA_Parser. com/programs/oledump-py/ - oledump/plugin_biff. py and plugin plugin_biff. xls 1: 4096 '\x05DocumentSummaryInformation' 2: 240 '\x05SummaryInformation' 3: 101978 'Workbook' Usage: oledump. Mar 18, 2020 · Plugin: BIFF plugin 0876 135 DCONN : Data Connection. Oledump - Copy from https://blog. bin file, but is not working. 8) to a txt file. py -p plugin_biff. py to crack these passwords using password lists (by default, an embedded password list is used that is taken from the Mar 8, 2020 · The reason is the following. I downloaded the script from github and move it to /usr/bin where the oledump. Of particular interest is the PowerShell command, executing a base64 encoded command extracted from stream 4 Those two files are Excel files that contain some malicious macros. RSS - Posts; Search for: Recent Posts. Feb 12, 2021 · My new version of plugin_biff. I'm using my tool oledump. Workspace; Questions. py plugin_biff now detects BIFF5/BIFF7 format and reports the file encryption mode (FILEPASS record). py –pluginoptions “-o BOUNDSHEET -a” “C:\Users\51257\Desktop\宏4. oledump_V0_0_59. Thx for your set of tools first, and Mar 15, 2019 · Spreadsheets with Excel 4. When these 2 bytes are 00 00, there is no password. py -p plugin_biff sample00/inv-27101. The byte value at position 5 in a BOUNDSHEET record defines the visibility of a sheet: visible (0x00), hidden (0x01) or very hidden (0x02). BIFF stands for Binary Interchange File Format and this structure varies from the current VBA format used currently by office documents. zip (https) MD5 Jun 29, 2024 · OLEDUMP with PLUGIN_BIFF; Office IDE; Suggested Resources: Example Excel 4 macro analysis from Hack-in-the-Box 2020 workshop; Excel 4 macro reference for Get. - decalage2/oletools Feb 28, 2021 · This new version of oledump. py con el plugin plugin_biff. exe para interactuar con una clave de registro relacionada con la configuración de seguridad de Microsoft Excel. xlm_macros (fixes #433) various fixes (PR #446) olevba and msodde now handle documents encrypted with common passwords such Jul 13, 2024 · A couple years ago, in diary entry "Unprotecting Malicious Documents For Inspection" I explain how . 1. # Small extract of oledump. py [options] oledump. Feb 11, 2023 · The script uses the oledump. … Jun 21, 2021 · Hi Didier, i have come across a problem with oledump. oledump_V0_0_60. Time to use XLMdeobfuscator and oledump with the plugin "plugin_biff" to extract Excel macros from those two files. py at master · seamustuohy/oledump. Of note ExcelSheetUnhide by DenK can help unhide multiple worksheets for manual analysis as above. py with plugin plugin_biff to locate these records: BIFF records PASSWORD contain 2 bytes of data: this is a custom hash of the actual password. py. py has a small change in the XML detection logic, and adds options –hexrecord and –xordeobfuscate to plugin plugin_biff. oledump. And plugin_biff adds support for MS Excel 4. py, se identificó un comando específico que emplea reg. 56 Describe the bug Running olevba on the attached malware sample produces: albrecht@denebola:~$ olevba Dec 14, 2017 · This is an update to plugin_biff, the oledump plugin to parse the BIFF format (used in . 4 is out Mar 6, 2020 · root@remnux:/malzoo# oledump. Protected xls files (workbook protection, sheet protection) are protected with a password, but are not encrypted. xls files). Reversing A Network Protocol; Extracting Information From “logfmt” Files With CyberChef Apr 23, 2020 · Saved searches Use saved searches to filter your results more quickly Dec 19, 2018 · This new version adds option –password to use a different password than infected for samples inside password protected ZIP files. 0 macros: In this output, we have all the BIFF records necessary to 1) determine that this is a malicious document and 2) report what this maldoc does. 0 macros can be analyzed with oledump. Here I’ll show how I use this to remove the sheet protection from malicious spreadsheets. xlm format) that we found in the wild. py: error: no such option: -x. icaeifaxqpxasuhzlpqnkjnirlzvgjjnjeejedlnadfdxeupmxqeobkmkyrrmtooucdsgemshclqbniz