The malicious OneNote sample analyzed in this video contains an executable. The executable contains a CAB archive in a resource entry. The CAB archive contains a VBS script which can directly be inspected in Cerbero Suite.
SHA256: F408EF3FA89546483BA63F58BE3F27A98795655EB4B9B6217CBE302A5BA9D5F7
Microsoft OneNote is rising in popularity as a vector for malware. Therefore, all commercial licenses of Cerbero Suite can now download our “OneNote Format” package from Cerbero Store which parses the OneNote format and extracts embedded files.
Installing the package from Cerbero Store takes only a few mouse clicks.
Once the package is installed, you can directly inspect OneNote documents in Cerbero Suite and all embedded files are automatically extracted and ready to be inspected.
The 2nd issue of Cerbero Journal, our company e-zine, is out!
In this issue we discuss the release of Cerbero Suite 6 and Cerbero Engine 3, new and improved cloud packages, improvements to our PDF parser, PDF malware hiding in images, one way we tested Cerbero Suite on the field and much more!
We’re happy to announce the release of Cerbero Suite 6.1 and Cerbero Engine 3.1!
This release contains many improvements to our PDF support.
Our PDF support has been featuring the capability to decode JBIG2 streams for many years.
JBIG2 is an imperative file format which has been demonstrated can be Turing complete. In fact, one of the most sophisticated exploits has been created exploiting a JBIG2 library in iOS. The exploit mentioned in the article creates over 70,000 segments to create a small virtual machine in logical operations defined by JBIG2.
In a recent release we made our already hardened JBIG2 decoding support even more secure by relegating it to a different process and constraining it to a time threshold.
This release features a completely rewritten JBIG2 library. Not only is it faster than the previous one, but it also has constraints on allocation and processing time by default. Therefore, now the library is being run again in the same process and it’s even faster than before.
For the customers of our engine: it is still possible to use the old JBIG2 library:
pdf.SetJBIG2LibraryVersion(1)
By default version 2 (the new library) is used.
Continue reading “Cerbero Suite 6.1 and Cerbero Engine 3.1 are out!”
We’re happy to announce the release of Cerbero Suite 6 and Cerbero Engine 3!
All of our customers can upgrade at a 50% discount their licenses for the next 3 months. We value our customers and everyone who has bought a license in August should have received a free upgrade for Cerbero Suite 6. Everyone who has purchased a license before August, but in the last 3 months, should have received an additional discount. Commercial customers with an active subscription plan should have already received a license for Cerbero Suite 6.
If you’re a customer of Cerbero Suite 5 and didn’t get an email from us, please contact us at sales@cerbero.io.
So what’s new?
While we published this package on Cerbero Store in August, it was actually planned for the 6.0 release: one of the main reasons for the introduction of Cerbero Store was the ability to offer certain types of updates as soon as they were ready.
Check out the video presentation for a quick introduction to the Sample Downloader package.
Installing the package from Cerbero Store takes only a few clicks. Once installed, you can go to the settings and enter your API keys for the supported intelligence services.
Continue reading “Cerbero Suite 6 and Cerbero Engine 3 are out!”
We have just released our Sample Downloader package and it is available for all licenses of Cerbero Suite Advanced.
While this is a simple package, we consider it extremely useful, as it allows to download malware samples by their hash. The package tries to download the requested samples from various supported intelligence services.
Check out the video presentation for a quick introduction!
Installing the Sample Downloader package from Cerbero Store takes only a few clicks. Once installed, you can go to the settings and enter your API keys for the supported intelligence services.
The malware sample analyzed in this video uses VBA code to extract a payload contained in Excel spreadsheet cells.
SHA256: F00252AB17546CD922B9BDA75942BEBFED4F6CDA4AE3E02DC390B40599CE1740
The following is the Python code which mimics the VBA extraction code.
from Pro.SiliconSpreadsheet import *
from Pro.UI import proContext
v = proContext().getCurrentAnalysisView()
if v.isValid():
view = SiliconSpreadsheetWorkspaceView(v)
ws = view.getSpreadsheetWorkspace()
sheet = ws.sheetFromName("Final Offer")
col = SiliconSpreadsheetUtil.colIndex("BS")
text = ""
for i in range(100, 701):
cell = sheet.getCell(col, i)
if cell.isEmpty():
continue
text += cell.value
print(text[::-1])
Note: the code must be executed while the spreadsheet is open in the analysis view.
We have just released version 2.1 of our AbuseCH Intelligence package for Cerbero Suite Advanced.
Apart from a few minor improvements, we added a summary view for the vendors supported by MalwareBazaar.
The summary provides an overview of the various vendor reports at a glance.
If you’re not yet familiar with our AbuseCH Intelligence package, you can check out the video presentation to quickly learn about its features.
Here summarized are the main news of this release of Cerbero Suite 5.7 and Cerbero Engine 2.7.
We have released an improved version of the originally named ‘MalwareBazaar Intelligence’ commercial package. We have renamed the package to ‘AbuseCH Intelligence’ and greatly expanded its functionality.
Check out the video presentation to quickly learn about its features.
If you want to learn more about the new features, you can read our dedicated post.
We have documented the API for parsing Microsoft legacy Office documents.
The documentation includes examples that show how to enumerate CFBF directories, decrypt documents, extract VBA code and decompile macros.
Our PDF support has been featuring the capability to decode JBIG2 streams for many years.
In this release we have made our already hardened JBIG2 decoding support even more secure by relegating it to a different process and constraining it to a time threshold.
JBIG2 is an imperative file format which has been demonstrated can be Turing complete. In fact, one of the most sophisticated exploits has been created exploiting a JBIG2 library in iOS. The exploit mentioned in the article creates over 70,000 segments to create a small virtual machine in logical operations defined by JBIG2.
Our changes perfectly prevent memory exhaustion and stalling issues: if the decoding process doesn’t complete within a given time, the decoding fails and the issue is reported to the user.
We have integrated human hashes in our analysis workspace. When you rest the cursor on the cryptographic hash of the current object, it displays the humanized version of the hash as a tool-tip.
The humanized hash can also be copied to the clipboard from the drop-down menu next to the cryptographic hash edit box.
While a human hash with a uniqueness of 1 in 4 billions defeats the security of cryptographic hashes, it may be useful when comparing hashes at a glance.
We have added support for the proprietary deflate64 decompression method. The decompression is integrated both in our Zip format support and in our filters technology.
We added a few new APIs to our SDK. The most important addition is the logicProviderArguments method, which can be used by logic providers to retrieve their command line arguments (in case they were invoked from the command line).
This is a small code example of a logic provider init function:
def customLogicProviderInit():
ctx = proCoreContext()
args = ctx.logicProviderArguments()
if not args.isEmpty():
# has arguments...
To more easily debug load errors of extensions, we have enabled a debug message which shows only once for each extension which failed to load. This change is mainly directed at developers of extensions.
We have also made other various improvements and fixed a few issues.
The soon to be released 5.7 version of Cerbero Suite Advanced comes with an improved version of the originally named ‘MalwareBazaar Intelligence’ commercial package. We have renamed the package to ‘AbuseCH Intelligence’ and greatly extended its functionality.
Check out the video presentation to quickly learn about its features.
Installing the AbuseCH Intelligence package from Cerbero Store takes only a few clicks.
Once installed, you can search malware samples on MalwareBazaar.
Searches can be performed using all supported parameters and also include recently uploaded samples.
Malware samples can be downloaded and analyzed right away, without ever leaving the Cerbero Suite user interface.
When you open a file in the analysis workspace, the complete MalwareBazaar intelligence can be accessed directly from the report.
Highlighted entries in the report can be activated to continue searching for additional malware samples.
The discovered malware samples can be batch-downloaded and are automatically added to the current project.
You can also perform custom searches on MalwareBazaar using the relevant action.
And, of course, all analyzed files are saved inside the current project.
We’re soon going to showcase the functionality of this package in more detail while performing real-world malware analysis.