PROACTIVE PREPARATION AND HARDENING AGAINST DESTRUCTIVE ATTACKS: 2026 EDITION

Summary from the TLDR InfoSec newsletter

Mandiant's 2026 hardening guide covers five core focus areas for defending against destructive cyberattacks: external-facing asset hardening, critical asset and backup protections, on-premises lateral movement controls, credential and account protections, and Kubernetes/CI/CD pipeline security. The guide provides prescriptive, actionable controls spanning MFA enforcement, virtualization enclave architecture, AD CS hardening, NTLM restriction, WDigest disablement, and LAPS deployment, each paired with MITRE ATT&CK-mapped detection opportunities. Organizations operating hybrid or cloud environments should treat this as a living reference, particularly given the guide's coverage of hypervisor-level disk swap attacks, immutable backup architecture, and CI/CD supply chain compromise scenarios.