§ Category
Category

Cyber Tools

AC

The Broker Refresh Token Can Register a Device in Entra ID

Device code phishing doesn’t defeat MFA — it redirects a legitimately MFA-completed sign-in — and the naive detection drowns in legitimate CLI traffic. The durable signal is the Authentication Broker redemption and the device registration that follows, and the real fix is a Conditional Access authentication-flows block.

·
AC

Entra Logs a Federated Credential Add as Update Application

Most SOCs detect service principal persistence by watching for “Add service principal credentials.” Federated identity credentials reach the same persistence with a different audit operation, on a different object, sometimes in a log source you never ingested.

·
AC

ESC16 Strips the SID Extension Strong Mapping Depends On

Microsoft’s strong certificate mapping enforcement finally landed, and where it’s genuinely in force it does close the naive implicit-mapping hole that made ADCS escalation trivial — a certificate with only a weak name is denied. ESC16 strips the CA-issued SID so the mapping decision falls to whatever’s left: on a compatibility-mode DC that’s weak SAN mapping, and even on a fully-enforced DC it’s an attacker-supplied SID-in-SAN URI the KDC treats as strong. The audit events you’d hunt it with are off by default.

·
CM

A .NET App Config Can Disable the Runtime’s ETW Provider

AppDomainManager hijacking loads attacker code into a Microsoft-signed .NET process before the app runs — and the same config file that does it can switch off the ETW telemetry your EDR depends on. The cleanest detection isn’t the dropped DLL. It’s the XML.

·
AU

Bring Your Own Installer: When the EDR Bypass Ships Inside the EDR

Attackers don’t need a vulnerable driver to blind an EDR — they need the agent’s own installer and a window. The durable detection isn’t the kill command, it’s the silence that follows. Here is what that detection looks like the first time you deploy it, and why it floods the SOC before it works.

·
CM

Win+X Opens Windows Terminal Without Writing to RunMRU

RunMRU is the tidiest endpoint signal for ClickFix, which is exactly why it’s the first thing attackers stopped touching. A look at what the registry detection catches, why it’s already half-blind, and the process-ancestry signal that actually survives.

·