Ransomware Recovery & Resilience After Saudi Attack

The client ran a boutique loan‑origination platform that served corporate customers throughout the Kingdom. Their IT stack was a mix of on‑premises Windows servers, a small private cloud, and a few SaaS tools. Rapid business growth had outpaced security spending, leaving gaps in endpoint protection, privileged‑access controls, and backup integrity. When ransomware struck, the attackers used a known exploit in an unpatched Microsoft Exchange server and then moved laterally with credentials stolen from a compromised admin workstation.

Threat environment in the GCC financial sector
Ransomware families such as REvil, Clop and LockBit dominate attacks in Saudi Arabia and the wider Gulf. They are typically delivered through spear‑phishing emails that slip past weak filtering. The client’s legacy antivirus relied on signature detection, so it missed the new payload. Their backup process created nightly snapshots on a shared NAS without write‑once protection, allowing the ransomware to encrypt the backups on the same day it hit production servers.

Compliance pressure after the incident
The Saudi Central Bank requires licensed financial entities to maintain documented incident‑response plans, immutable backups and regular vulnerability scanning. The audit window was under six weeks; without proof of remediation the client faced fines and possible suspension of its operating license. The ransomware outage also halted service to three major corporate borrowers, costing an estimated AED 2.3 million in revenue and damaging client trust.

Why existing controls failed

• Endpoint detection was limited to signature‑based antivirus and lacked behavior analytics.


• Privileged accounts were stored locally with no vault, making credential theft easy.


• The backup architecture had no air‑gap, so ransomware spread to secondary storage.


• No centralized SIEM meant analysts could not see lateral‑movement activity until encryption began.

These gaps created a perfect storm and required a multi‑layered remediation effort. The incident underscored that firms across the UAE and the broader GCC must align security investments with regional regulatory expectations to avoid similar disruptions.

Discovery and Assessment

Our team ran a 72 hour forensic sprint, installing CrowdStrike Falcon sensors on every endpoint to capture process trees, registry changes and network connections. Log streams from firewalls, domain controllers and VPN concentrators were fed into Splunk Enterprise Security where we built a baseline of normal user activity. The assessment uncovered 27 compromised workstations, five privileged accounts that reused passwords and a missing patch for CVE‑2021‑34527 on the Exchange server.

Stakeholder Alignment

We brought together a cross‑functional steering committee that included the CFO, head of compliance, IT operations manager and the chief information security officer. The committee produced a risk register that ranked findings by financial impact and regulatory exposure, a key step for organizations operating under UAE data‑protection rules. They approved a two‑track plan: immediate containment and recovery, followed by a strategic hardening program. Communication protocols were formalized, with daily status briefs delivered via Microsoft Teams and a shared run‑book stored in Confluence.

Architecture Design

The new design implements a zero‑trust perimeter that separates the loan‑processing network from corporate email and finance systems. Palo Alto Networks Cortex XDR serves as the unified detection and response engine, ingesting endpoint telemetry and network‑flow logs. For privileged access we deployed CyberArk Privileged Access Manager to vault credentials and enforce just‑in‑time elevation. Backup storage was moved to Azure Blob with immutable policies enabled, guaranteeing that snapshots cannot be altered for 30 days.

Tool Selection

Tool decisions were driven by compatibility with the client’s existing Microsoft 365 environment and a budget of AED 150,000‑200,000 per year. CrowdStrike Falcon offered lightweight agents and cloud‑native analytics; Splunk Enterprise Security provided the needed log‑correlation capabilities without extensive on‑prem hardware. Palo Alto Networks Cortex XDR was chosen for its ability to correlate endpoint and network data, and CyberArk satisfied the regulatory requirement for privileged‑credential protection common across GCC financial institutions. All solutions were secured under multi‑year agreements to lock in pricing discounts.

Phase 1 - Foundation

We began by hardening the Exchange server, applying the missing patches and disabling legacy authentication protocols. Immutable Azure snapshots were configured for all critical VMs, with a separate storage account locked down by Azure RBAC. CrowdStrike Falcon agents were redeployed across the environment, and a baseline policy was established to block unknown executables and PowerShell scripts that lacked a trusted signature.

Phase 2 - Core Implementation

Next, we integrated Splunk Enterprise Security with data connectors for firewalls, Active Directory, and VPN logs. Custom detection rules were authored to flag anomalous lateral movement, such as a standard user account attempting to access multiple high‑value servers within a five‑minute window. Palo Alto Networks Cortex XDR was deployed on critical servers, enabling automated quarantine of processes that matched ransomware behavior patterns. CyberArk vaulted all privileged credentials, and just‑in‑time access was enforced through a workflow that required manager approval for each elevation request.

Phase 3 - Hardening and Optimisation

We instituted a continuous vulnerability management program using Tenable.io, scheduling weekly scans and automatic ticket creation in ServiceNow for high‑severity findings. Email security was upgraded with Microsoft Defender for Office 365, adding anti‑phishing safe links and attachment sandboxing. Incident response playbooks were codified in the SOAR platform, allowing one‑click execution of containment steps such as network segmentation and endpoint isolation. Finally, tabletop exercises were run with the board and senior management to validate the new response workflow and ensure alignment with Saudi Central Bank audit expectations.

The new immutable backup regime allowed the organization to restore all encrypted workloads from a clean snapshot taken before the attack, eliminating the need to negotiate with the ransomware gang. Mean time to detect fell from twelve days to under two hours, while mean time to respond dropped to four hours, cutting potential downtime by 85 %. Alert volume in Splunk Enterprise Security decreased by 42 % after tuning, freeing analysts to focus on high‑severity incidents. The privileged credential vault reduced credential reuse incidents by 100 %, and phishing click‑through rates fell by 73 % after deploying Microsoft Defender for Office 365. Compliance evidence was ready for the Saudi Central Bank audit, resulting in a clean opinion and no penalties. Overall, the client reported an estimated AED 1.8 million reduction in projected ransomware loss exposure and saved roughly 120 hours of manual remediation effort per quarter.

Lesson 1: Early Detection Beats Reactive Cleanup

Investing in behavior‑based endpoint detection and centralized log correlation reduced detection time dramatically, preventing ransomware from spreading beyond the initial foothold.

Lesson 2: Immutable Backups Are Non‑Negotiable

Air‑gapped, write‑once backup storage ensured data could be recovered without paying a ransom, turning a potential catastrophe into a controlled restoration.

Lesson 3: Privileged Access Controls Harden the Attack Surface

Vaulting and just‑in‑time elevation eliminated credential reuse, removing a common ransomware propagation vector and satisfying regulator expectations for privileged account management.