This is an update to plugin plugin_vba_dco.py, improving generalization and adding option -p.
You can watch this maldoc analysis video to learn how to use the generalization feature of this plugin:
This update to jpegdump.py, my tool to analyze JPEG images, brings 2 small changes:
Data between segments can be selected with suffix d. Like this: -s 10d
This means: select the data between segments 9 and 10.
And when option -E is used to add hash values, repeating hashes are marked with parentheses.
This is a bug fix version and also adds updated statistics.
1768_v0_0_16.zip (http)Some new features that help with analyzing memory dumps.
Here is the analysis of a VMware vmem file:
There’s a new sanity check, determining if an extracted configuration is OK or not OK (NOK).
A config passes the sanity check if it contains a valid payload type and a valid public key.
Configurations that don’t pass the sanity check, are most likely false positives: they have a valid header, but no valid fields. They can show up in memory dumps of Windows machines.
Option -S can be used to hide configurations that don’t pass the sanity check:
Now we are just left with detections of the sleep mask routine. What’s new in this version, is that the position where the signature was found is listed.
Finding both 32-bit and 64-bit routines is unusual.
Option -V can be used to dump 256 bytes before and after the signature, to help us get an idea what we are dealing with.
And what we actually found here, is the memory of the anti-virus program containing signatures, like signatures for Cobalt Strike sleep mask deobfuscation routines.
1768_v0_0_15.zip (http)This new version of re-search.py adds a regex for UNCs to the library and has a Python 3 fix.
This update brings an update to plugin plugin_vba_dco.py.
This is a plugin that scans VBA source code for keywords (Declare, CreateObject, GetObject, CallByName and Shell), extracts all lines with these keywords, followed by all lines with identifiers associated with these keywords.
For example, if the result of a CreateObject call is stored in variable oXML, then all lines with this oXML identifier are selected.
I updated this plugin with two options -g (–generalize) and -a (–all).
Option -g generalize will replace all identifiers (like variable & functions names) with a general name: Identifier#### where #### is a numeric counter.
I added this option to analyze a sample where almost all identifiers where completely unreadable, as they consisted solely out of characters that are between byte values 128 and 255 (e.g., non-ASCII).
Here is the output for that sample, without using any plugin option:
You can see the CreateObject functions, but appart from the WshShell identifier, the other identifiers don’t have letters and are hard to trace in the code.
This changes when you use option -g:
All identifiers have been generalized to names like Identifier0001, Identifier0002, …
To view all generalized code (and not only the lines with keywords), use option -a:
Remark that this plugin is not a VBA parser: it uses some simple scans and regexes to find identifiers. For example, it handles line comments like any other lines.
oledump_V0_0_69.zip (http)This new version adds JSON input support, allowing,for example, to detect encoded payloads inside the registry:
More info in an upcoming blog post.
base64dump_V0_0_23.zip (http)This is the release of simple_listener.py, a Python program that can accept TCP and UDP connections and react according to its configuration. It has evolved from my beta program tcp-honeypot.py, that I will no longer maintain.
Everything you could do with tcp-honeypot, can be done with simple_listener.
I use simple_listener now whenever I need a server that listens for incoming TCP and/or UDP connections. For example, I have a configuration that can accept connections from Cobalt Strike beacons using leaked private keys.
simple_listener has a full man page, explaining all configuration items and options.
simple_listener_v0_1_2.zip (http)This new version of format-bytes.py adds a feature to search for a range of integers:
#iv5#6080 means: look for an integer (i) equal to 6080 with a variation of 5 (v5), e.g., look for integers between 6075 and 6085.
format-bytes_V0_0_14.zip (http)This new version contains a Python 3 fix.
cut-bytes_V0_0_15.zip (http)
Didier Stevens 