A compromised identity network with sapphire authentication nodes and forged access signals, as titanium containment barriers isolate malicious authority while protecting critical operational data flows.A compromised identity network with sapphire authentication nodes and forged access signals, as titanium containment barriers isolate malicious authority while protecting critical operational data flows.
S10 Group Article series · The operational attack realities

When the System That Defines Trust
Can No Longer Be Trusted

How identity compromise can make legitimate-looking actions unsafe before systems stop working
Article #26
Published: 30 October 2026
By Stan van Gemert | S10 Group
By Stan van Gemert
When attacks move series

Executive summary

The previous publication, "Detection Does Not Automatically Create Control", examined the gap between a credible alert and a proportionate interruption. That gap becomes more dangerous when the account, token or administrative path carrying the activity still appears legitimate.

"When the System That Defines Trust Can No Longer Be Trusted" follows the incident into the identity layer. A log may confirm that an action occurred without proving who controlled the account, session or authority behind it. Recovery then depends on clean administrative paths, independent confirmation and the ability to stop harmful behaviour before identity certainty returns.

Today's special edition is "The Transaction Was Valid. The Authority Was Not." It carries the identity problem into a live financial incident. The Binance case shows how recognised signatures and delegated authority can execute technically valid transfers even when the business instruction behind them is unauthorised.

A complete log can still leave the actor uncertain

The log entry looked helpful at first. An administrator account had changed a privileged policy, and the system had preserved the timestamp, username, device and event ID that an incident team would normally use to establish what happened.

The action and its record were not in dispute. The harder question was whether the administrator behind it was real.

The account may belong to a legitimate employee while the session has been hijacked, the token forged, the device controlled by an attacker or the identity service induced to accept proof that no longer establishes legitimate authority.

Once that possibility becomes credible, every restart, restore, account disablement and management action depends on a path that may itself be compromised. Your teams can still see activity, but visibility no longer proves who acted.

A log can establish that an action occurred without proving that the person or session behind it was legitimate.

The system that answers who are you

Most executives rarely need to think about Active Directory or Microsoft Entra ID during normal operations. Identity infrastructure sits behind logins, email, file access, applications, privileged administration and device control, which makes it easy to experience as background plumbing.

Its role is much larger. The identity layer continually answers who is making a request, whether the identity is valid, what it may reach and which instructions other systems should accept.

Identity infrastructure therefore resembles the badge office, key cabinet and authority register combined. Control of one room may leave a recognisable boundary. Control of the system that issues badges and changes the access register can cause many other controls to obey the wrong authority.

A valid action can still carry false authority

Normal operations depend on the identity system distinguishing legitimate users and services from everyone else. During an identity compromise, the same mechanisms can produce dangerously incomplete reassurance.

A privileged action may be legitimate or an attacker using stolen credentials. A cloud login may belong to a real user or rely on a forged token. A policy change may be emergency maintenance or persistence. A restored domain controller may be clean or may reintroduce the access that made the incident possible.

Identity certainty does not need to disappear across the entire environment before the problem becomes serious. A bounded zone of doubt can slow containment and recovery when clean accounts, protected administrative paths and independent confirmation have not been prepared.

When identity authority was erased and when it was forged

Joint guidance from ASD, CISA, NSA, the Canadian Centre for Cyber Security, NCSC-NZ and the UK NCSC describes Active Directory as a pivotal authentication and authorisation system. The agencies warn that control of it can provide privileged access across managed systems, bypass other controls, reach connected cloud services and establish persistence that is difficult to remove.

The 2017 NotPetya attack on Maersk shows the operational consequence of erased identity authority. WIRED reported that recovery depended on one surviving domain controller in Ghana that had been offline during the attack. Without usable domain-controller data, the team could not simply restore the many systems that depended on it.

Authority can also be forged. Mandiant documented an intrusion in which stolen AD FS signing material allowed a threat actor to create a SAML token capable of bypassing two-factor authentication and conditional-access policies. MITRE ATT&CK describes the wider forged-SAML technique.

Sources:

ASD and international partners - Detecting and mitigating Active Directory compromises
https://www.cyber.gov.au/business-government/detecting-responding-to-threats/detecting-and-mitigating-active-directory-compromises
‍

WIRED - The Untold Story of NotPetya
https://www.wired.com/story/notpetya-cyberattack-ukraine-russia-code-crashed-the-world/

Mandiant - Stolen AD FS signing material and Golden SAML
https://cloud.google.com/blog/topics/threat-intelligence/russian-targeting-gov-business

MITRE ATT&CK - Forge Web Credentials SAML Tokens
https://attack.mitre.org/techniques/T1606/002/

Note: These examples do not mean every account, log or identity service becomes unreliable during every incident. They support a narrower conclusion: when the authority that issues or validates identity is compromised, restoring machines does not by itself establish who is acting through them.

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Every recovery action becomes conditional

Identity compromise becomes an operational crisis when the paths used to contain and recover the environment are also under suspicion.

Your incident team may need to disable accounts, isolate systems or restore services, but each action raises a prior question about the account, device and route used to perform it. Internal communication may also depend on mailboxes, distribution lists or collaboration platforms that remain under investigation.

A conventional outage asks how to turn a service back on. An identity incident must also establish who may restore it, through which administrative path and with what independent confirmation that the action will not preserve the compromise.

Speed without reliable authority can make recovery less safe. Restoring a server through a compromised identity plane may return the attacker, while re-enabling accounts too broadly can reopen the original route.

A clean system is not safely recovered when the account session or administrative path restoring it remains suspect.

Recovery becomes an authority investigation

A credible recovery plan must establish which domain controllers can be relied upon, which privileged and service accounts remain clean, which tokens and federated relationships must be revoked or rotated, and whether the recovery environment is independent from the route under investigation.

Investigators also need to know which logs remain reliable, where activity may have been disabled or altered and whether important actions can be corroborated through sources outside the compromised authority.

Those questions make investigation inseparable from recovery. Your teams need to know which functions can return inside a constrained boundary, which require more confirmation and which must remain isolated.

The executive dilemma

Your executive team faces a genuine trade-off because both delay and haste carry operational risk. Moving too slowly prolongs disruption while customers, suppliers, regulators and employees need answers. Moving too quickly can preserve hidden access, reintroduce the adversary or create false reassurance.

A protected operating space helps manage that tension. Break-glass accounts, trusted communications, clean-room administration, recovery sequencing and clear reconnection conditions allow authorised people to act without relying on the same path under investigation.

The decisive question is whether enough reliable authority remains to support bounded action while the wider identity picture is rebuilt.

If normal identity and administrative paths become suspect who can still authorise isolation and recovery through a clean route?

Harmful behaviour can be stopped before identity certainty returns

An attacker may be using an account, session or token that still appears legitimate. Our platform responds to the malicious behaviour carried through that access rather than treating a familiar identity as permission for the activity to continue.

Ransomware Containment automatically isolates the responsible user or session when active encryption is detected across supported SMB and NFS file activity. Optional Server Intrusion Protection stops hostile server access involving compromised administrator credentials, interrupting reconnaissance, lateral movement, data theft and attempts to reach or destroy backups. Optional Virtual Server Protection protects supported VMware and Hyper-V environments when malicious activity targets the shared virtual foundation.

These technical actions operate according to the features deployed and configured. They stop progression that would otherwise continue through identities, servers, data paths or virtual workloads while your teams investigate the identity compromise, rotate credentials, rebuild authority and sequence recovery.

Identity restoration and technical containment solve different parts of the incident. Rebuilding Active Directory or Entra ID restores reliable authority. Our platform prevents identity uncertainty from becoming unlimited attacker reach while that work continues.

A legitimate-looking identity does not give malicious behaviour unlimited freedom to continue.

What your executive team should know before identity certainty fails

  • What your executive team should know before identity certainty fails
  • Who can exercise emergency authority without relying on the same identity path under investigation?
  • Which accounts, devices and communication channels are reserved for recovery?
  • Which privileged actions require independent confirmation?
  • Which services can continue inside a protected boundary while identity is rebuilt?
  • Which harmful behaviours can our platform detect and stop according to the features deployed?
  • What must be confirmed before broader access and services are reconnected?

See how our platform contains hostile behaviour behind valid access

Curious how our platform can stop ransomware encryption, hostile server access, reconnaissance, lateral movement, data theft and attacks against virtual infrastructure even when the account or session still looks legitimate? Schedule a conversation with us.

We will present how Ransomware Containment and its optional Server Intrusion Protection and Virtual Server Protection features operate during a live security breach. If a practical demonstration is useful afterwards, a controlled Ransomware Containment assessment can compare active-encryption outcomes while your existing security controls remain active throughout.

Discuss the platform with us

The log may remain while certainty disappears

A log may preserve the timestamp, account and action while no longer proving that the named administrator authorised what happened. That is the point at which a familiar technical incident becomes a crisis of operational authority.

Systems cannot return safely merely because they can be restarted. Your teams must also recover the people, sessions and administrative paths through which restoration can proceed.

Identity uncertainty does not have to become operational paralysis. Reliable authority can be rebuilt while our platform stops the malicious behaviour that would otherwise use that uncertainty to expand the security breach.

The next horizon

The next special edition is "The Transaction Was Valid. The Authority Was Not." It carries the identity problem into a live financial incident. The Binance case shows how recognised signatures and delegated authority can execute technically valid transfers even when the business instruction behind them is unauthorised.

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Coming soon

Monday 2 Nov 2026, Resilience-series #9: "When Every Minute Matters, Readiness Cannot Wait"

Wednesday 4 Nov 2026, Leadership-series #9: "The First Hour Exposes Decision Readiness"

Friday 6 Nov 2026, Operational Attack-series #9: "The Internal Report Was Clean. The Business Still Stopped."

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