Attack Surface Management

ASM continuously discovers and monitors all internet-facing assets — domains, subdomains, IPs, cloud services, APIs — to identify exposed or vulnerable entry points before attackers do. Simply Data provides a real-time view of your external attack surface so you can prioritise risk reduction.

As businesses expand to the cloud and adopt SaaS applications, unknown or forgotten internet-facing assets accumulate. Attackers actively scan for these. ASM gives you continuous visibility so no asset is left unmonitored — especially critical for compliance with BNM RMiT and Malaysia's Cybersecurity Act 2024.

A vulnerability scan is a point-in-time assessment of known assets. ASM is continuous and discovery-led — it finds assets you may not know you have (shadow IT, forgotten subdomains, misconfigured cloud resources) and monitors them 24/7 for new exposures.

The effectiveness of an ASM programme is measured through several key metrics: reduction in total attack surface over time (fewer exposed assets and services), mean time to discover (MTTD) new assets and vulnerabilities, percentage of unknown assets brought under management, number of critical exposures remediated within SLA, and recurrence rate of previously fixed issues. Mature ASM programmes also track risk score trends across business units and benchmark against industry peers. Regular executive reporting on these metrics ensures continuous improvement and demonstrates ROI to board-level stakeholders.

Vulnerability management focuses on identifying and remediating known vulnerabilities within your known IT assets — systems, applications, and devices already in your inventory. Attack Surface Management (ASM) goes a step further by first discovering all assets that are internet-facing, including unknown, forgotten, or shadow IT assets that traditional vulnerability scanners would miss.

In short: vulnerability management scans what you know you have; ASM finds what you have first, then assesses the risk. Both are complementary — ASM provides the asset inventory that makes vulnerability management comprehensive and accurate.

External Attack Surface Management (EASM) is the continuous process of discovering, monitoring, and reducing the digital footprint that your organisation exposes to the public internet — including websites, cloud services, APIs, subdomains, open ports, and third-party integrations. Unlike internal vulnerability scans, EASM mimics the perspective of an attacker performing reconnaissance from outside your network.

EASM is critical because organisations often accumulate internet-facing assets faster than security teams can track them — through cloud sprawl, shadow IT, and legacy systems. A forgotten subdomain or misconfigured cloud storage bucket can become an attacker's entry point. EASM ensures continuous visibility over everything your organisation exposes externally.

Shadow IT refers to systems, applications, and cloud services used by employees or departments without the knowledge or approval of the IT or security team. ASM discovers shadow IT by continuously scanning internet-facing infrastructure for assets registered to your organisation's IP ranges, domain names, and SSL certificates — including those not in your official asset register.

Common shadow IT discoveries include: unauthorised SaaS applications connected to corporate credentials, unmanaged cloud storage buckets, test or development environments left internet-accessible, and forgotten subdomains pointing to third-party services. By surfacing these assets, ASM allows security teams to bring them under governance or decommission them before attackers exploit them.

For effective Attack Surface Management, continuous or near-real-time discovery is the recommended standard — as new assets, services, and exposures can appear at any time due to cloud deployments, development activity, or third-party changes. At a minimum, full attack surface scans should be conducted weekly, with targeted scans triggered by significant infrastructure changes (new cloud deployments, domain registrations, or mergers and acquisitions).

For organisations in regulated industries in Malaysia (financial services under BNM RMiT, or critical infrastructure under the Cyber Security Act 2024), continuous monitoring is increasingly expected as part of a proactive cybersecurity posture. Point-in-time scans conducted quarterly or annually are insufficient given the pace of modern infrastructure change.

Attack Surface Management (ASM) focuses on continuously discovering and inventorying all digital assets that could be targeted by attackers. CTEM (Continuous Threat Exposure Management) goes a step further: it actively validates whether discovered exposures are exploitable in your specific environment, prioritises them by real-world impact, and tracks remediation to closure. While ASM answers "what assets do you have exposed?", CTEM answers "which exposures represent the highest real risk to your organisation right now?". Simply Data's ASM service includes both passive asset discovery (EASM) and active exposure validation (CTEM) — giving you a complete picture from discovery to risk-prioritised remediation.

Yes. Mobile applications published by your organisation to the iOS App Store and Google Play Store are included in the ASM monitoring scope. We check for: (1) Rogue or impersonating mobile apps using your brand name (a common phishing vector); (2) Sensitive data hardcoded in your app binary (API keys, credentials); (3) Outdated app versions still in circulation with known vulnerabilities; (4) App permissions that expose user data. Mobile app monitoring is increasingly important for Malaysian organisations in the banking (BNM RMiT) and retail sectors, where impersonating mobile apps are used to steal customer credentials.

Yes, both are covered. Source code repositories: Simply Data's ASM scans public code repositories (GitHub, GitLab, Bitbucket) for accidental exposure of your organisation's code, credentials, API keys, infrastructure configs, and proprietary algorithms. Leaked source code is a critical risk — it enables attackers to identify vulnerabilities and bypass security controls. Shadow IT: We discover internet-facing assets that your IT team may not know exist — employee-provisioned cloud services, forgotten test environments, legacy systems, and unauthorised SaaS tools — and flag them for review. Shadow IT represents a growing attack surface for Malaysian organisations accelerating cloud adoption, where ungoverned assets are frequently targeted.