How a Financial Services Firm Cut Detection Time by 92%

This case study is based on a real client engagement. Certain details have been generalised to protect the identity of the organisation, which has asked to remain anonymous. The operational outcomes described are based on data from the first 12 months of deployment.

This case study documents how a mid-market financial services firm in the Asia-Pacific region reduced its average credential exposure detection time from approximately 26 days to under 2 days after deploying Scrutex's external risk monitoring platform. The firm has asked to remain anonymous, which is standard for case studies involving security operations. The findings described here are based on the firm's operational data from the first 12 months of deployment.

The Organisation

The firm is a licensed financial services provider with several hundred employees across multiple offices. It operates under Australian financial services regulations, including obligations under APRA's CPS 234 information security standard. Its clients include a mix of retail and institutional investors.

The firm's security team consisted of two people: a Head of IT who held security responsibilities alongside infrastructure and helpdesk oversight, and a part-time contractor who assisted with compliance documentation and vendor reviews. There was no dedicated SOC, no in-house threat intelligence capability, and no SIEM. This is a common setup for firms of this size, and it is important context for understanding both the challenges they faced and why the solution they adopted needed to be operationally simple.

The Problem

In mid-2024, the firm experienced an incident that forced a reassessment of its security posture. A threat actor used credentials belonging to a senior employee to access the firm's client portal. The credentials had been harvested by infostealer malware from the employee's personal laptop and had appeared on a dark web marketplace approximately six weeks before the incident. The firm had no visibility into this exposure and only became aware of the compromised credentials after the unauthorised access triggered an anomaly alert in their cloud identity provider.

The direct impact was contained. The attacker accessed client contact information but did not reach transaction systems. However, the firm was required to make regulatory notifications under Australia's data breach notification obligations, and it triggered a review of its compliance posture under CPS 234.

The post-incident review revealed several systemic gaps:

• No dark web monitoring. The firm had no mechanism to detect when employee credentials appeared on breach databases, stealer log marketplaces, or paste sites. The credentials that led to the incident had been available on a well-known dark web forum for 42 days before they were used.
• No external attack surface visibility. The firm's IT team maintained a manual asset register, but it had not been updated to include several cloud services and subdomains that had been provisioned over the previous 18 months. Three of these had expired SSL certificates, and one was running an outdated CMS with known vulnerabilities.
• No brand monitoring. A quick investigation during the post-incident review found two active typosquat domains impersonating the firm's client portal. One had been registered four months earlier. Neither had been detected.
• Quarterly vulnerability scans only. The firm ran external vulnerability scans quarterly, aligned to its audit cycle. The gap between scans meant that new exposures went undetected for weeks or months.
• Manual compliance evidence. CPS 234 requires entities to demonstrate they are managing information security risks on an ongoing basis. The firm's evidence trail consisted of quarterly scan reports and an annual penetration test. There was no documentation of continuous monitoring activity because no continuous monitoring was taking place.

What Changed

The firm deployed Scrutex's monitoring platform to address the gaps identified in the post-incident review. The deployment was completed in a single day by the Head of IT without external consultancy support. The initial configuration covered the firm's primary domain, three subsidiary domains, and a watchlist of critical vendors.

The platform immediately began:

• Continuous external asset discovery and vulnerability scanning across all domains and associated infrastructure, replacing the quarterly scan cycle.
• Dark web and credential monitoring of the firm's email domain against breach databases, stealer logs, and dark web marketplaces, with alerts delivered within hours of a new exposure being detected.
• Brand and domain monitoring for typosquat registrations, phishing pages, and impersonation infrastructure targeting the firm's brand.
• Vendor risk monitoring tracking the external security posture of the 14 vendors on the firm's critical supplier list.
• Monthly risk reports providing a structured summary of all monitoring activity, findings, remediation status, and trend data, formatted to serve as CPS 234 compliance evidence.

The Results After 12 Months

Credential Exposure Detection

In the first 12 months of monitoring, the platform identified more than 20 instances of employee credentials appearing on dark web sources. Of these, 17 were from historical breaches of third-party services (LinkedIn, Dropbox, and several industry-specific platforms) and 6 were from more recent stealer log activity.

The average time from credential appearance on a dark web source to detection and alert dropped from approximately 26 days (the firm's estimate of its pre-deployment detection capability, based on the incident investigation timeline) to 1.8 days. All exposures were remediated through forced password resets within 4 hours of alert receipt.

The Head of IT noted that without the platform, most of these exposures would never have been detected at all, let alone within 48 hours. The firm had no prior capability to search dark web sources, and its previous approach relied on employees self-reporting suspicious activity on their accounts.

External Attack Surface

The initial asset discovery scan identified 30+ internet-facing assets associated with the firm's domains, compared to ~20 in the manually maintained asset register. The nine previously unknown assets included a staging environment for a client-facing application, two legacy subdomains pointing to decommissioned services, and several cloud resources provisioned by third-party developers.

Over 12 months, the platform detected and alerted on 4 newly appearing assets, 2 expired SSL certificates, 3 instances of known CVEs on internet-facing infrastructure, and 1 open database port that should not have been publicly accessible. Each finding was remediated within the firm's SLA targets.

Brand Protection

The platform detected 7 typosquat domain registrations targeting the firm's brand during the monitoring period. Of these, 3 were assessed as active threats (hosting phishing pages or configured with MX records for email sending). Takedown requests were initiated for all 3 active domains, with an average resolution time of 5 business days.

Vendor Risk

Of the 14 vendors on the critical supplier watchlist, 2 experienced material changes in their external risk profile during the monitoring period. One vendor's rating declined after several critical vulnerabilities were detected on their internet-facing infrastructure. The firm used this intelligence to initiate a security review with the vendor, which resulted in the vulnerabilities being remediated within two weeks.

Compliance Evidence

The firm's CPS 234 compliance documentation shifted from quarterly snapshots to continuous evidence. Monthly reports generated by the platform provided documented evidence of ongoing monitoring activity, including what was discovered, what action was taken, and how the firm's risk posture trended over time. This evidence was cited in the firm's next APRA prudential review as a material improvement in its information security programme.

What the Numbers Show

Key Takeaways

Small teams can run effective exposure management programmes

The firm's security function consisted of 1.5 people. They did not hire additional staff or engage external consultants to operationalise the platform. The deployment was completed in a single day, and the ongoing operational overhead is approximately 2 hours per week reviewing alerts and monthly reports. The notion that continuous monitoring requires a large SOC or dedicated threat intelligence team is outdated.

Detection time is the metric that matters most

The difference between detecting a credential exposure in 26 days versus 2 days is the difference between an attacker having six weeks to use those credentials and having less than 48 hours. In the firm's previous incident, the 42-day gap between credential exposure and detection was the entire window the attacker needed. Closing that gap eliminated the attack vector.

Compliance evidence is a byproduct of good security practice

The firm's CPS 234 compliance posture improved not because it undertook a dedicated compliance project, but because continuous monitoring naturally produces the documented evidence that regulators want to see. Monthly reports, alert logs, and remediation tracking create an audit trail that demonstrates ongoing risk management far more convincingly than annual penetration test reports.

The cost of not monitoring is higher than the cost of monitoring

The firm estimated that its credential compromise incident cost a significant sum in direct expenses (incident response, legal advice, regulatory notifications, and customer communications) plus an unquantifiable but significant impact on client confidence. The annual cost of continuous monitoring was significantly less than the cost of a single incident. The economics are not close.

A Note on Methodology

This case study is based on operational data provided by the client with their consent. Detection time measurements are based on platform alert timestamps compared to the firm's estimated prior detection capability. The "before" detection time of 26 days is an estimate derived from the post-incident investigation timeline and the firm's own assessment that most credential exposures would have gone entirely undetected under its previous approach.

We have not named the client at their request. Financial services firms in Australia are understandably cautious about public discussion of security incidents and capabilities. We respect that, and we believe the operational data speaks for itself.

Frequently Asked Questions

How long does it take to deploy a CTEM platform?

In this case study, the firm's Head of IT completed the full deployment in a single day without external consultancy support. The initial configuration covered the primary domain, three subsidiary domains, and a watchlist of 14 critical vendors. The platform began producing actionable findings immediately, with the first credential exposure alerts arriving within the first week.

Can a small security team run continuous exposure management?

Yes. The firm in this case study operated with a security function of 1.5 people (a Head of IT with shared responsibilities and a part-time compliance contractor). The ongoing operational overhead after deployment was approximately 2 hours per week reviewing alerts and monthly reports. Continuous monitoring does not require a dedicated SOC or a large team when the platform handles discovery, correlation, and alerting automatically.

What compliance frameworks does continuous monitoring support?

Continuous external monitoring produces documented, timestamped evidence that satisfies requirements across multiple frameworks, including APRA CPS 234, DORA, NIS2, ISO 27001:2022, and SOC 2. In this case study, the firm's monthly reports were cited in its next APRA prudential review as a material improvement in its information security programme, replacing quarterly scan snapshots with continuous compliance evidence.