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SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

SANS Stormcast Friday, April 18th: Remnux Cloud Environment; Erlang/OTP SSH Vuln; Brickstorm Backdoor Analysis; GPT 4.1 Safety Controversy

SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

SANS ISC Handlers

Tech News, News, Technology

4.9696 Ratings

🗓️ 18 April 2025

⏱️ 6 minutes

🧾️ Download transcript

Summary


RedTail: Remnux and Malware Management
A description showing how to set up a malware analysis in the cloud with Remnux and Kasm. RedTail is a sample to illustrate how the environment can be used.
https://isc.sans.edu/diary/RedTail%2C%20Remnux%20and%20Malware%20Management%20%5BGuest%20Diary%5D/31868
Critical Erlang/OTP SSH Vulnerability
Researchers identified a critical vulnerability in the Erlang/OTP SSH library. Due to this vulnerability, SSH servers written in Erlang/OTP allow arbitrary remote code execution without prior authentication
https://www.openwall.com/lists/oss-security/2025/04/16/2
Brickstorm Analysis
An analysis of a recent instance of the Brickstorm backdoor. This backdoor used to be more known for infecting Linux systems, but now it also infects Windows.
https://www.nviso.eu/blog/nviso-analyzes-brickstorm-espionage-backdoor
https://blog.nviso.eu/wp-content/uploads/2025/04/NVISO-BRICKSTORM-Report.pdf
OpenAI GPT 4.1 Controversy
OpenAI released its latest model, GPT 4.1, without a safety report and guardrails to prevent malware creation.
https://opentools.ai/news/openai-stirs-controversy-with-gpt-41-release-lacking-safety-report

Transcript

Click on a timestamp to play from that location

0:00.0

Hello and welcome to the Friday, April 18th, 2020-5 edition of the Sands Inunders Stormcast.

0:09.2

My name is Johannes Ulrich, and today I'm recording from Orlando, Florida.

0:14.2

Today we got another guest diary by one of our undercredit interns.

0:19.2

Jacob Clay Camp did write about how to get started in Malvern

0:25.4

Analysis. Of course, we have plenty of diaries always about Malar analysis, Dillet and Xavier,

0:32.4

most notably are heavily contributing to this. This is more the beginner's view of malware analysis and

0:40.5

sort of how to get started with malware analysis using a cloud-based system. A couple

0:47.1

interesting parts here. First of all, Jacob is using AWS, a free instance, and then uses KASM workspace in order to essentially get a remote

0:59.4

desktop into a container, which then runs Remnux. This is Lenny Seltzer's reverse analysis environment.

1:09.5

All of this is Linux-based, and since it is set up in a container,

1:14.2

it's also easy to reset and the cloud deployment of course makes it nice and isolated from

1:20.5

anything that you may have going on in your home network. Overall, interesting setup and

1:26.2

then Jacob is going over a quick analysis of a

1:30.4

redtail sample and how to apply this particular environment to the analysis of this particular

1:36.9

matter. Interesting write-up and nice step-by-step guide to help you get started.

1:44.8

Then we have a critical vulnerability affecting the Erlang OTP SSH library.

1:53.2

This affects any SSH servers written in this language.

1:56.9

The vulnerability was found by researchers at the Rural University in Bohum. Now, the OTP here in Erlang,

2:04.8

OTP, does not stand for one-term, one-time password. Instead, it does stand for the open

2:10.8

telecom platform. This particular version of Erlang was created and maintained initially by Erickson and is often used in telecom-related devices, routers, and the like.

2:24.5

So certainly there is quite a number of affected devices out there.

2:29.2

The CVSS score of the vulnerability is a perfect 10.0 because it does allow for arbitrary code

...

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