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18/08/2026 2:15 pm
TL;DR: A real Windows Active Directory intrusion, spanning RDP password spraying, hidden admin creation, Mimikatz dumping, WMI lateral movement, and DC credential replication, still separates models that can investigate from those that can only narrate, according to Cotool. The result reinforces that credential access, privilege escalation, and report synthesis remain brittle under live adversary conditions.
NHIMG editorial — based on content published by Cotool: BlueBench-Intrusion-002, a real multi-host Windows Active Directory intrusion benchmark
By the numbers:
- The benchmark uses 3.9M+ real events across 40 log tables, covering five hosts in a live Windows intrusion dataset.
- GPT-5.6 Sol reached 79.2% accuracy, ahead of Claude Opus 4.7 at 75.5% and Claude Opus 4.8 at 74.2%.
Questions worth separating out
Q: What breaks when password spraying is not detected early in Windows environments?
A: A single successful spray can convert many weak attempts into one valid session, and that session often becomes the foothold for privilege escalation, remote tooling, and lateral movement.
Q: Why do hidden admin accounts increase compromise severity in Active Directory?
A: Hidden admin accounts create standing privilege that survives the initial intrusion and gives attackers a reusable control channel.
Q: How do security teams know whether lateral movement exposure is actually improving?
A: Teams should measure how many systems remain reachable from a single internal foothold, how many critical hosts accept broad RDP or SSH, and how much authentication still depends on legacy protocols.
Practitioner guidance
- Harden RDP exposure and spray detection Limit RDP exposure, enforce strong lockout and risk-based authentication, and alert on distributed login attempts that span many accounts and a short time window.
- Correlate memory credential access with privilege changes Treat Mimikatz-like credential dumping and hidden admin creation as a single escalation chain, then route both to the same investigation queue for immediate containment.
- Restrict WMI and other remote execution paths Constrain administrative remoting to approved hosts, log WMI execution lineage, and baseline the wmiprvse.exe to cmd.exe to powershell.exe pattern against normal IT automation.
What's in the full report
Cotool's full research covers the operational detail this post intentionally leaves for the source:
- Task-by-task benchmark breakdown showing where detection engineering, malware analysis, and incident reporting diverged.
- Model-by-model latency, cost, and tool-call data for teams comparing investigation workflows.
- The full attack-path reconstruction, including the exact sequence from spray to domain credential replication.
- Benchmark methodology notes on how every detection rule was re-executed against the live dataset.
👉 Read Cotool's BlueBench-Intrusion-002 analysis of Active Directory intrusion detection →
Active directory intrusion benchmarks: what defenders need to fix?
Explore further
18/08/2026 3:06 pm
Detection engineering is now an identity governance problem as much as a SOC problem. This benchmark shows that the hardest part is not spotting a single login anomaly, but understanding how credential abuse, account creation, and lateral movement chain together across hosts. That is why IAM, PAM, and SIEM teams need shared telemetry and shared escalation paths. The practitioner conclusion is that identity events must be treated as attack sequences, not isolated alerts.
A question worth separating out:
Q: Who is accountable when domain controller credential replication is abused?
A: Accountability should sit jointly with identity operations, platform security, and incident response, because replication abuse sits at the intersection of directory governance and detection. The right control owners are the teams that manage directory permissions, monitor replication events, and can revoke exposed administrative paths before the breach broadens.
👉 Read our full editorial: Windows active directory intrusion benchmarks expose detection gaps
