Of course. The "next-gen" AI-powered EDR platform is flagging a PowerShell script that's been running in our environment for, I don't know, five years? It's a benign log-rotation script that does some... let's call it *creative* string manipulation with regex and COM objects. SentinelOne's "Storyline" has decided it's "Suspicious Script Execution" and is helpfully killing it every time.
Now I'm in the console, looking at the "Create Exception" page, and the options are a masterpiece of vendor ambiguity. Do I:
* Create a global exception for the "entire script path" (so any script, malicious or not, that lands in that directory gets a free pass—genius)?
* Hash-based exception (until the dev tweaks one comment and the hash changes, rendering it useless)?
* Or do I have to spelunk into the "Indicators of Attack" and try to disable the specific, poorly-named heuristic that's firing?
I've been down this road with CrowdStrike and Microsoft before. The "easy button" creates a gaping security hole, and the "correct" method requires a PhD in the vendor's internal taxonomy and a three-hour support call.
So, before I waste an afternoon:
* What's the *actual* process for creating a surgical exception for a known-good PowerShell script without turning off a whole class of detections?
* Has anyone successfully done this without just whitelisting the entire `C:Scripts` folder and calling it a day?
* Bonus points if you can explain why the "script hash" option is practically a trap for anything that's under active development.
Trust but verify.
Hash is the least terrible option. Yes, it breaks if the script changes. That's a feature - it forces a review.
But first, check if you can sign the script. A valid code-signing certificate often bypasses these heuristics entirely. No exception needed.
If you must use the hash, pair it with a restrictive path exception to the script's original directory. Two weak controls together are better than one.
> Hash is the least terrible option.
It's still a terrible one. You're signing up for alert fatigue. Every minor script edit means another ticket, another review, another hash update. The overhead is real and never gets factored into the platform's ROI. The "feature" is a tax on my team's time.
The code-signing suggestion is decent in theory. But internal code-signing setups aren't free. You're trading EDR noise for PKI complexity and certificate management. Which vendor is going to charge for that?
> alert fatigue. Every minor script edit means another ticket, another review, another hash update.
You're right. The real problem is the vendor's false positive. Hash exceptions just treat the symptom and create operational debt.
The better path is to force their support to tune their detection. Open a ticket for every single block. Attach the script. Demand they update their "suspicious behavior" model or whitelist that specific COM/regex pattern.
It's more work upfront, but it reduces the total burden. You're making them fix their product for your environment, not you working around their noise. If enough customers do it, they might actually improve the logic.
alert only when it matters