• 7 Posts
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Joined 1 year ago
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Cake day: August 15th, 2023

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  • (thinks out lound…)

    If you could force different speeds and different voltages, you can make some guesses as to what the cable might support.

    USB packets use CRC checks, so a bad checksum may indicate a speed or physical problem. (Besides stating the obvious, my point is that doing strict checks for each USB mode gives CRC more value.)

    I just looked over the source code for libusb (like I knew what I was looking for, or something) and it seems that some of the driver(?) components hook really deep into the kernel. There might be a way to test specific parts of any type of handshake (for dataflow or voltage negotiation) to isolate specific wires that are bad by the process of elimination.

    I think my point is that a top-down approach is likely possible, but it’s probabilistic.












  • It’s one of the better EDR (Endpoint Detection and Response) tools on the market. For enterprises, they are able to suck down tons of system activities and provide alerting for security teams.

    For detection, when I say “tons of data”, I mean it. Any background logs related to network activity, filesystem activity, command line info, service info, service actions and much more for every endpoint in an organization.

    The response component can block execution of apps or completely isolate an endpoint if it is compromised, only allowing access by security staff.

    Because Crowdstrike can (kind of) handle that much data and still be able to run rule checks while also providing SOC services makes them a common choice for enterprises.

    The problem is that EDR tools need to run at the kernel level (or at a very high permission level) to be able to read that type data and also block it. This increases the risk of catastrophic problems if specific drivers are blocked by another kind of anti-malware service.

    When you look at how EDR tools function, there is little difference between them and well written malware.

    Crowdstrike became a choice recently for many companies that got fucked over by Broadcom buying VMWare. VMWare owned another tool, Carbon Black, which became subject to the fuckery of Broadcom so more companies scrambled to Crowdstrike recently.

    I hope that was enough of a summary.