Hello and welcome to the Friday, February 7th, 2025 edition of the Sands Internet Storm Center's Stormcast.

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

And Xavier today wrote up an interesting anti-debugging system that he found in a Python script.

It is labeling itself as a multilayer anti-debugging system, actually an unbreakable multi-layer

anti-debugging system.

It's implemented in various threats that run in parallel, that in itself, of course, makes it a bit more difficult

to figure out what's going on here and to disrupt these anti-debugging techniques. Some of them

are sort of well known, for example, checks if the program is being traced, but also have some

interesting things, for example, overwrite the file itself with randomized lines in order to prevent hashing.

It also does calculate a checksum of its memory footprint ever so often to detect

tampering. Interesting techniques here, of course they can all get bypassed, in particular

in something like a Python script where it's not that difficult to go into the file and make

changes to the file, like for example, to disable some of these techniques. And Xavier is going

over some of the other sort of interesting techniques here as well.

There are about a dozen or so techniques in total that are being employed by this single piece of matter.

When it comes to remote management tools, it's often a fine line between which tools are malicious and which tools are beneficial for an organization.

And that line is usually not defined by the tool that's being used, but by who is actually

using the tool. We often see, well, most famously, tools like VNC and RDP being used by attackers

in order to remote control compromised systems.

Silent Push has a good little update on how Screen Connect is currently being used.

Again, a legitimate tool that's often used by administrators to remote-manage systems,

but is also used by attackers, and Silent Push is listing some of the

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