A compromise assessment is a structured investigation of your environment designed to identify signs of attacker presence that existing security controls have missed. It examines endpoints, identity infrastructure, network telemetry, cloud environments, and logs for indicators of compromise: attacker tools, lateral movement, persistence mechanisms, data staging, and command-and-control activity.
A compromise assessment answers a specific question: has your organisation been breached, and if so, where is the attacker now, how did they get in, how long have they been present, and what have they done? For organisations that have not experienced a confirmed incident, it answers a different version of the same question: is there attacker activity in the environment that existing monitoring has not surfaced?
Security is not a product you buy. It is an outcome you earn. Advanced threat actors operating in APAC environments prioritise stealth over speed. They move slowly, use legitimate tools to avoid triggering detection rules, and establish persistence across multiple systems before taking action. By the time they act, they have had weeks or months of undetected access.
Existing security monitoring identifies threats it is configured to look for. Compromise assessments identify threats that existing monitoring missed, including attacker techniques that bypassed detection rules, persistence mechanisms established before current tooling was deployed, and attacker presence in environments not covered by current monitoring scope.
Theos compromise assessments are led by practitioners from our Digital Forensics and Incident Response practice. The investigation combines threat intelligence about the adversaries relevant to your industry and market with purpose-built tooling and practitioner-led examination of your environment.
The assessment begins with threat intelligence scoping: which adversary groups are targeting your industry, which techniques they use, and which indicators of compromise are most relevant to your environment. The investigation is directed by what a real attacker targeting your organisation is most likely to have done. Threat intelligence shapes the scope before collection begins.
Theos deploys purpose-built collection tooling across your endpoint estate, gathering forensic artefacts that reveal attacker presence even when the attacker has taken steps to cover their tracks. Memory artefacts, registry persistence, scheduled tasks, installed tools, and lateral movement indicators are examined across the full scope.
Identity infrastructure is the primary target for advanced threat actors seeking persistent access. Theos examines Active Directory, Azure AD, and cloud identity for account compromise, privilege escalation, persistence mechanisms, and credential harvesting activity. Golden ticket attacks, DCSync activity, and OAuth application abuse are examined as standard.
This threat hunting assessment examines SIEM, EDR, and system logs for attacker activity that existing detection rules missed. Theos analysts look beyond what the tools flagged to what the tools saw but did not alert on, identifying attacker behaviour consistent with known adversary tradecraft that fell below detection thresholds or was not covered by existing rules.
Cloud environments are examined for configuration-based access, anomalous API activity, data exfiltration indicators, and persistence mechanisms specific to cloud infrastructure. For organisations with significant Azure, AWS, or GCP footprints, cloud environment coverage is a material component of the assessment scope.
The assessment produces a structured findings report documenting all indicators of compromise identified, the attacker activity observed, the timeline of events where reconstructible, and a prioritised remediation plan. Where active attacker presence is confirmed, Theos moves directly to incident response.
Confirmed answer to whether your environment has been breached
Full attacker timeline where compromise is identified: initial access, lateral movement, persistence, and data access
Remediation plan prioritised by risk and designed to remove attacker access completely
Independent assurance for boards, regulators, and insurers that the environment has been examined
Intelligence that informs your ongoing security programme: detection gaps closed, monitoring scope extended, VAPT scope prioritised
Evidence for regulatory notification assessment: whether a reportable breach has occurred and what data was accessed
Confirmed answer to whether your environment has been breached
Full attacker timeline where compromise is identified: initial access, lateral movement, persistence, and data access
Remediation plan prioritised by risk and designed to remove attacker access completely
Independent assurance for boards, regulators, and insurers that the environment has been examined
Intelligence that informs your ongoing security programme: detection gaps closed, monitoring scope extended, VAPT scope prioritised
Evidence for regulatory notification assessment: whether a reportable breach has occurred and what data was accessed
Theos works with your team to define the assessment scope, agree rules of engagement, and brief the investigation team on the specific threat actors, techniques, and indicators most relevant to your environment and industry.
Theos deploys collection tooling across the agreed scope, gathering forensic artefacts from endpoints, identity infrastructure, network devices, cloud environments, and log sources. Collection is designed to be operationally non-disruptive and forensically sound.
Theos analysts examine collected data for indicators of compromise using both automated analysis and practitioner-led investigation. The investigation is directed by threat intelligence and practitioner experience, not limited to automated rule matching.
All indicators of compromise identified during analysis are validated before inclusion in the findings report. Theos distinguishes between confirmed compromise, suspected compromise requiring further investigation, and artefacts that are consistent with compromise but have innocent explanations.
Theos delivers a structured findings report covering all confirmed and suspected indicators of compromise, the attacker activity observed, the timeline of events, and a prioritised remediation plan. For organisations where active compromise is confirmed, Theos moves directly to incident response.
When a peer organisation in the same industry is breached using techniques that could have been applied to your environment, a compromise assessment provides the independent assurance that the same attacker has not already gained access to yours.
Mergers and acquisitions introduce environments with unknown security history. A compromise assessment of an acquired entity’s environment identifies attacker presence before it becomes an inherited breach. Post-acquisition assessments are standard practice for organisations with mature security programmes.
MAS TRM, HKMA iCAST, BNM RMiT, and BSP frameworks all carry expectations around security assurance. Theos compromise assessments across APAC provide the independent, practitioner-led evidence that regulators, boards, and insurers require.
Unexplained system behaviour, unusual network traffic, or anomalous user activity that existing monitoring has not explained may indicate attacker presence operating below detection thresholds. A compromise assessment investigates those anomalies with practitioner depth and threat intelligence context.
Automated tools match indicators against known libraries. Theos practitioners investigate your environment against the specific techniques of the adversaries most likely to have targeted you. This cyber compromise investigation finds what a skilled attacker left behind.
Theos compromise assessments are led by practitioners from our DFIR practice with direct experience investigating breaches across APAC. If the assessment identifies active attacker presence, the DFIR team responds immediately.
Findings feed directly into the broader security programme. Detection gaps identified become detection rules in MDR. Attacker techniques become test cases for the next VAPT or red team engagement.
Independent assurance for boards, regulators, and insurers that the environment has been examined
If your organisation has been breached, the question is when you find out: before the attacker acts, or after. A Theos Compromise Assessment gives you the answer, and a clear path to remediation if one is needed.
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