This blag post covers scanning the Ghidra virtual memory with YARA.
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This is a quick one: If you are living in Germany but enjoy using a US keyboard layout — for one reason or another — I recommend using the EU keyboard layout instead.
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NSQ is an awesome and extremely simple distributed message queue. You can simply use it by publishing messages — that is arbitrary text, I often use JSON — on a so called "topic". A second process can than attach to a topic to consume messages on a so called "channel". Each messages is forwarded into each channel (at least once). This blag post covers deployment of NSQ in the simplest scenario: one box running everything.
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Assume you did all the proper and mature building steps for your Symfony application. You have a build environment independent of your development environment. You really made sure all the environment variables like
COMPOSER_NO_DEV and NODE_ENV are set correctly without getting the double negatives confused. And you execute composer, yarn, and whatnot with all the good switches like --no-dev, --frozen-lockfile, and --production. But you still get the following error message:
Attempted to load class "WebProfilerBundle" from namespace "Symfony\Bundle\WebProfilerBundle".
Did you forget a "use" statement for another namespace?
APP_ENV="prod" on the **production system**. It of course makes sense when you think about it. But it always does, once you figured out. Anyway: I hope this helps a fellow traveler at some point in the future! ❤️
Just a quick blag for my future self:
FOR row IN coll
FOR entry in doc.array
FILTER entry.field_name != @field_name
LIMIT @limit
RETURN DISTINCT doc
DISTINCT on the RETURN fixed the problem of "I'm getting the same document over and over again" it now doesn't return @limit many documents but seemingly a random — but lower — number. What's actually happening here is, that the indentation is deceiving: the last two lines should be indented one more.
FOR row IN coll
FILTER POSITION(doc.array[*].field_name , @field_name) == false
LIMIT @limit
RETURN doc
FOR row IN coll
FILTER @field_name NOT IN doc.array[*].field_name
LIMIT @limit
RETURN doc
The official documentation on ArangoDB usage in Symfony is [literally from 2013](https://www.arangodb.com/2013/03/getting-started-with-arangodb-and-symfony-part1/) and hence targeting a pretty old Symfony version. This blag post will cover adding minimal ArangoDB support by hand. The actual database protocol and interacting will be handled by [ArangoDBClient](https://github.com/arangodb/arangodb-php).
Show me what you've got!
If you want to perform
SOUNDEX similarity searches with Doctrine in Symfony, you first need to define it as a so called "DQL User Defined Functions". Resources online are a bit dated so I decided to publish this quick blag post.
That _sounds_ nice, show me more!
When creating invitations to Discord servers – or "guilds" how they seem to called internally – you can configure some limits. For example, you can limit the number of times a link can be used to join a server or you can configure an expiry date. The default setting for the time limit is 7 days btw, which is why most links are expired when you come back to them after some time. I was in the situation that I wanted to invite a limited number of people to a Discord server and each should only receive a link that can only be used once. So in some sense, I wanted to create personalized invite links, which doesn't seem to be a use case that's supported out of the box.
So let's use Python!
I recently played around with scraping public Telegram channels and finally want to do something with the data. In particular, I wanted to play around with Named Entity Recognition (NER)
and Sentiment Analysis on the content of the Telegram posts. I think this will probably work much better when you do it for each language separately. So before we answer the question "what's this post about?" or "how angry is the person in the post?", let's answer the question "what language is the post in?" first. And we'll do it while warming up with that hole machine learning (ML) topic. Be aware: I have no idea what I'm doing.
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This blog post will cover my audio setup on Windows. It's core component is called VoiceMeeter which is a virtual audio mixer for Windows developed by Vincent Burel under the company label "VB-Audio". This blog post will focus on the fact that it makes virtual microphones and virtual speakers available which in turn can be used by all program running on your computer.
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**Disclaimer:** If you are not running Windows on your host, you might not get anything out of this post. Sorry Tux.
I am convinced that the Windows Sandbox is one of the best virtualization solutions to do dynamic malware analysis (for Windows malware, at least). The reason is quite simple: Distinguishing a Windows 10 Sandbox instance from the actual underlying Windows 10 install should be very difficult for malware. Specifically if the host is running on HyperV with Guarded Host enabled, my current understanding is that there are little to no differences between the two, but they are neatly isolated from one another. The configuration options are limited, but you can easily cook up a config that launches a WindowsSandbox instance that has all the tools you need for some basic unpacking & dynamic analysis. This is what my malware analysis sandbox looks like at launch:
I have successfully executed a number of samples that evade execution in other virtualized environments. That's a far cry from rigorous testing, so take my praise with a grain of salt. Still, it might be worth a try, the setup is really easy. Do you want to see my config?
I have successfully executed a number of samples that evade execution in other virtualized environments. That's a far cry from rigorous testing, so take my praise with a grain of salt. Still, it might be worth a try, the setup is really easy. Do you want to see my config?
(English-only readers can safely ignore this post)
I'll be talking at FrOSCon this year again and try to take a stab at a topic that does not _only_ involve technical topics but will also tell the story of a bank heist. This heist wasn't supported by getaway cars and pistols but was solely carried out through cyber-means. The talk is in German though.
* Source Code of LaTex Presentation: https://github.com/larsborn/FrOSCon2021-Ghidra-Bangladesh-Talk
* Handout PDF: FrOSConTalk2021-Ghidra-Bangladesh
* FrOSCon schedule entry: https://programm.froscon.de/2021/events/2670.html
* Recording on media.ccc: https://media.ccc.de/v/froscon2021-2670-der_cyber-bankraub_von_bangladesch
I idly googled for the title and couldn't find code that I can insipidly paste into a console window. So I prepared it here for fellow travelers (and my future self):
wget 'https://github.com/NationalSecurityAgency/ghidra/releases/download/Ghidra_10.0.1_build/ghidra_10.0.1_PUBLIC_20210708.zip'
unzip ghidra_10.0.1_PUBLIC_20210708.zip
sudo apt install default-jdk
./ghidra/ghidraRun