May 4, 2020 I downloaded this malicious excel file on my VM for malware analysis. OLEVBA. py. First thing I did analysis of VBA macro source code in excel

The Excel 4.0 macros (XLM) feature was introduced in Excel version 4.0 way back in 1992. [2] This style of macro predates the also commonly abused Visual Basic for Applications (VBA) macros. Some of the early adopters of this variation of the technique [3] were found to deliver Zloader [4] and Dridex [5] .

Stores VBA macro code or Excel 4.0 macro sheets (.xlm). Excel 97- VBA != Macros. There are at least two macro languages supported by MS Office. • Visual Basic for Applications (VBA).

From the Insert window select MS Excel 4.0 Macro, then click OK. A new worksheet will appear which is probably labelled Macro1, if you’ve not already got a Macro Worksheet. Excel 4.0 macro (also called XLM) have been commonly used by malicious operators these last years, it has also been analyzed and commented by several researchers (red or blue). This format is used a lot in the recent years as it is considered to be less detected by AV, also it is not processed by AMSI. The Microsoft Excel 4.0 macro isn't evaluated in the context of the current workbook or sheet. This means that any references should be external and should specify an explicit workbook name. For example, to run the Microsoft Excel 4.0 macro "My_Macro" in Book1 you must use "Book1!My_Macro()". If you don't specify the workbook name, this method To start with our shellcode writing, we must create a sheet as an Excel Macro 4.0 sheet, refer to Outflank’s blog post/Derbycon 2018 video for more information.

These macros are not stored in dedicated VBA streams, but as BIFF records in the Workbook stream.

A few days ago, FortiGuard Labs harvested a fresh Excel sample and found that it was spreading a new NetWire RAT variant. In this post, we will look at how this Excel 4.0 Macro executes in an Excel file, how the NetWire RAT is installed on the victim’s system, as well as what this NetWire RAT variant actually does once it is installed.

Figure 3: Adding Excel 4.0 Macro Sheet. We will write our code in this sheet and then hide it to avoid being suspicious from the target user. We can simply execute a simple on-disk executable using excel 4.0 macros using the below command: Figure 4: Executing calc.exe from disk using Excel 4.0 macros.

2020-10-15

Here is a unhidden example. These macros are assoiciated with Excel 97-2003 Workbook .XLS files and are still supported by the latest versions of MS Excel. If a macro is written in VBA using code editor, it is not an Excel 4.0 macro. Excel 4.0 macro is a bunch of commands on a sheet.

Apr 12, 2020 Running and debugging an Excel 4.0 macro: In case we have inserted a macro in our Excel sheet like seen below we can execute and debug it a A brief discussion about the differences between macros and VBA, and how this course covers both. Mar 2, 2019 Today, Microsoft is using VBA macros (Visual Basic for Applications) instead of Excel 4.0 macro technology. This leads to XLM macros not Although Microsoft Excel still supports Excel 4.0 (XLM) macros, we encourage you to migrate them to the latest version of Microsoft Visual Basic for Applications (VBA). Migrating your macros lets you take advantage of the improvements to the VBA programming object model. If you decide you’re not ready to migrate, you can still run Excel 4.0 macros.
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Just delete that sheet and pretend you never saw that.

2020-06-22 · Excel 4.0 macros use formulas in various cells to execute code, top down, left to right and most likely located in hidden worksheets. Here is a unhidden example.
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2020-04-14

Migrating your macros lets you take advantage of the improvements to the VBA programming object model. If you decide you’re not ready to migrate, you can still run Excel 4.0 macros.

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I recently reversed another Excel document with 4.0 Macros that was similar to my previous post on the subject but had some added anti-analysis features that I wanted to share. I recommend reading the previous post to learn more as this article will not be going step-by-step through the analysis process.

Migrating your macros lets you take advantage of the improvements to the VBA programming object model. If you decide you’re not ready to migrate, you can still run Excel 4.0 macros. The Excel 4.0 macros (XLM) feature was introduced in Excel version 4.0 way back in 1992. [2] This style of macro predates the also commonly abused Visual Basic for Applications (VBA) macros. Some of the early adopters of this variation of the technique [3] were found to deliver Zloader [4] and Dridex [5] . Excel 4.0 Macro Functions Reference A COMPREHENSIVE LIST OF MICROSOFT EXCEL 4.0 MACRO FUNCTIONS Excel 4.0 Macro Functions. Before VBA there were XLM macros.