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Incident ResponseAug 26, 2026

CISA Red Team Compromised Two Critical Infrastructure Orgs, One Detected Nothing

CISA red team fully compromised two critical infrastructure orgs; one detected nothing, the other responded in minutes.

CISA published results of simultaneous red team assessments against two critical infrastructure organizations using similar attack techniques with drastically different outcomes. Organization A failed to detect any compromise despite full domain takeover and cloud access via misconfigurations (default credentials, AD CS abuse, cleartext credentials, overpermissioned Entra ID apps), while Organization B detected and isolated phishing payloads within 2–20 minutes, preventing lateral movement. Both organizations shared underlying weaknesses including cleartext credential storage, static cloud access keys, and misconfigured Active Directory services.

AI summary of the linked source. Not reviewed by an editor. How this works

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The lesson from this incident

Full lesson

CISA's simultaneous red team assessments revealed that default credentials, misconfigured Active Directory Certificate Services, and overpermissioned cloud applications allowed full domain takeover of Organization A — which detected nothing throughout the entire engagement. Organization B's swift detection and containment within 2–20 minutes demonstrated that the same attack techniques can be effectively neutralized when mature monitoring and response capabilities are in place. The core failure in Organization A was not a lack of patches alone, but a compounding of poor configuration hygiene with zero visibility into attacker activity. This matters because critical infrastructure organizations face nation-state and sophisticated threat actors who actively exploit exactly these misconfigurations, and undetected compromise can persist for months. The contrast between the two organizations is a stark reminder that security controls are only as effective as the organization's ability to detect when they fail.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • mitre_attack — T1078.004
  • mitre_attack — T1566.002
  • mitre_attack — T1548.004
  • mitre_attack — T1649
  • mitre_attack — T1040
  • mitre_attack — T1528
  • mitre_attack — T1550.001
  • mitre_attack — T1110.001
  • mitre_attack — T1003.001

Entities

CISA (vendor)Microsoft (vendor)Active Directory Certificate Services (product)Entra ID (product)System Center Configuration Manager (product)Amazon Web Services (vendor)