Failed to run BaseObfuscator - Web UI Not Loading about caldera HOT 8 OPEN

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I am unable to reproduce this behavior on Edge 123.0.2420.81 & Chrome 123.0.6312.123 with Caldera v5. Does it happen with any adversary, or maybe a specific one?

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It happens with any Operation using any Adversary. Are there any additional logs I can look at?

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You already have the server in Debug mode, so none that I know of. However, you could probably try to debug manually, the base_obfuscator.py file is very small, and in fact there are 3 possible lines for your error.

For starters, maybe just modify lines 20/21 to see what's happening, e.g.:

except Exception as e:
    logging.error('Failed to run BaseObfuscator, returning default decoded bytes. Error: ', e)

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I find it weird that it happens so consistently on your instance while I can not see it. Did you customize any part of the code?

EDIT: on a fresh codebase, no configuration nor code change, this doesn't happen to me.

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Are you on Ubuntu 22.04?

I performed an install exactly per the docs for version 5.0.0 and then experienced a ton of issues (some of which are currently tracked as issues, others were not)
Example issues on 5.0.0 (both of which were solved using the suggested steps)

• #2911
• #2883

After all the issues with 5.0.0, I created a new Ubuntu 22.04 VM and installed 4.2.0 where I encountered many of the same issues.

In both instances, this was a base Ubuntu install with no other packages/installations installed beyond those requested in the Caldera install instructions (which are very, very minimal - meaning it's 4 commands, copy/pasted to the command line - not sure how I would have messed that up twice).

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I'm on Ubuntu (Server) 22.04, the only issue I encounter when following the README (I think the docs are outdated) is for the remote access, solved in #2885.

Assuming we have the same code, I can only imagine a difference in the dependencies. I had some trouble with vue when I upgraded to V5 (right when it got released), a guy on Slack gave this which ended up working for me:

FYI all, I was able to get a functional caldera v5 with the following installation steps on a fresh ubuntu 22.04:
1) Install git\python\pip\virtualenv
sudo apt update && sudo apt upgrade -y && sudo apt install python3-venv python3-dev npm git -y
2) Update Node & NPM
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
source ~/.bashrc
nvm install stable
3) Download Caldera
git clone https://github.com/mitre/caldera.git --recursive
4) Create environment & activate
cd caldera
python3 -m venv venv
source venv/bin/activate
5) Install requirements
pip install -r requirements.txt
pip install donut-shellcode==1.0.2
6) Install Go & UPX
sudo snap install go --classic && sudo snap install upx
7) Run caldera
python3 server.py --insecure --build 

Here are my versions:

• Python 3.10.12
• node v21.6.2
• go v1.22.2

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This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days

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