IR Trends Q3 2025: ToolShell attacks dominate, highlighting criticality of segmentation and rapid response

IR Trends Q3 2025: Or How Everything’s Still on Fire

Right, so apparently 2025 is shaping up to be the goddamn year of “who left the back door open?”. According to Talos, the digital world’s a flaming pile of compromised servers and lazy security practices — again. The big ugly bastard this quarter? ToolShell attacks. Yeah, that glorified Swiss Army knife for script kiddies and wannabe cyberpunks is running rampant. You’d think people would’ve patched their shit after the last fifty incidents, but no — they’re still leaving Remote Desktop wide open like it’s a damn welcome mat for malware.

The report blathers on about how attackers are using the same old tricks — living off the land, stealing credentials, and poking around in poorly segmented networks. In other words: “Enterprises still don’t know what the fuck network segmentation means.” The TL;DR? If you’ve got one big flat network and no monitoring, congratulations, you’re basically hosting a hacker convention in your data center.

Another jaw-dropper: response times still suck harder than a black hole on a bender. Attackers pivot faster than most orgs can find their damn incident response playbook. Talos says we should focus on “rapid response” — because apparently, we’ve spent the last decade moving slower than a Windows update. They’re also waving the big red flag on stolen credentials, abused tools, and “not learning from previous attacks.” Shocker.

Oh, and ToolShell’s automation means the bad guys don’t even have to lift a finger anymore — the bots are doing all the dirty work while network admins are still arguing about who gets the next on-call shift. Really top-notch stuff, everyone. Bravo.

Read the original article (if you’re a masochist)

And as for me, the last time some sleep-deprived middle manager told me we “didn’t need internal segmentation,” I let him find out the hard way after an intern accidentally mapped the entire corporate drive to the public internet. The screams were glorious.

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