This article is based on a post originally sourced from hostreview.com (2017). While some statistics cited in the original are undated and unattributed, the threats and countermeasures described remain broadly relevant. See review notes for caveats.
Why the Cloud Has Become a Prime Cybercriminal Target
Cloud computing has transformed how organizations store, process, and access data. The economies of scale, flexibility, and cost savings it delivers have made it the default infrastructure choice for businesses of every size. However, that same popularity makes the cloud an increasingly attractive target for cybercriminals. As more sensitive data migrates to cloud environments, attackers follow the data.
This does not mean the cloud is inherently less secure than on-premises infrastructure—in many respects, major cloud providers invest more in security controls than the average enterprise can afford on its own. The real risk stems from misconfiguration, poor access management, and the expanded attack surface that comes with borderless, internet-accessible infrastructure.
The Unique Security Challenges of Cloud Environments
Data Stored Outside Your Perimeter
When a business moves to a cloud provider, data physically resides on the provider’s infrastructure. While reputable providers implement strict access controls and encryption, this shared-responsibility model means organizations must understand exactly what they are responsible for securing and what the provider handles. Misunderstanding that boundary is one of the most common sources of cloud data breaches.
Data Distributed Across Multiple Jurisdictions
Cloud data may be replicated across data centers in different countries, each governed by different data protection and privacy laws. This creates compliance complexity and can complicate incident response when a breach occurs across multiple regions.
Dynamic, Borderless Infrastructure
Traditional perimeter security—firewalls, physical network boundaries—does not map cleanly to cloud environments. Workloads scale up and down automatically, services communicate via APIs, and access is granted over the public internet. Attackers exploit this openness through exposed APIs, overly permissive identity and access management (IAM) policies, and misconfigured storage buckets.
Common Cyber Threats Targeting Businesses (Cloud and On-Premises)
Understanding attack vectors is the first step to defending against them. The following threats affect businesses regardless of whether they operate in the cloud, on-premises, or in a hybrid environment.
1. Malware Delivered via Web Browsing or Downloads
Employees browsing the web or downloading free software introduce significant malware risk. Unpatched browser plugins—Java is a historically common example—provide entry points that malware authors actively exploit. Once installed, malware can exfiltrate credentials, encrypt files for ransom, or enlist the machine in a botnet used to attack other targets, including cloud services.
Key control: Enforce software patching policies and restrict the installation of unapproved applications, especially on systems with access to cloud administration consoles.
2. Phishing and Email-Based Malware
Phishing remains one of the most effective attack techniques because it targets people rather than systems. Attackers craft convincing emails that appear to come from trusted senders—couriers, banks, software vendors, or even internal colleagues—and include links or attachments that deliver malware or harvest credentials.
Email spoofing allows attackers to make the sender address appear legitimate. Modern phishing campaigns are highly targeted (spear-phishing) and may reference real order numbers, invoice details, or internal project names to increase credibility.
Key controls: Enable SPF, DKIM, and DMARC DNS records on your domain to reduce spoofing. Deploy a gateway-level email security solution. Train employees to verify unexpected requests through a second channel before clicking links or opening attachments.
3. Social Engineering and Vishing
Social engineering attacks exploit human trust rather than technical vulnerabilities. A common scenario: an attacker contacts an employee by phone or email, impersonates IT support or a software vendor, and persuades the target to grant remote access or disclose credentials under the pretense of resolving a technical problem. Once access is granted, the attacker can install malware, exfiltrate data, or move laterally through the network.
Key control: Establish a strict policy that IT or any vendor will never cold-contact employees to request credentials or remote access. Any such request should be verified independently using a known-good phone number or internal ticketing system.
Practical Steps to Protect Your Business
Defending against cloud and general cyber threats does not require an unlimited security budget. The following measures address the most common attack vectors and represent a solid baseline for small and mid-size businesses.
- Maintain reliable, tested backups. Back up critical data regularly to an offsite location or a separate cloud account. Verify that restores work—a backup you have never tested is a backup you cannot trust. Immutable or air-gapped backups are particularly valuable against ransomware.
- Use reputable, actively maintained endpoint security software. Free or trial-tier antivirus products typically offer reduced protection and may lack behavioral detection, threat intelligence feeds, and centralized management. Invest in a solution appropriate for your environment and keep it updated.
- Implement business-grade email and spam filtering. Consumer-grade email services and basic spam filters are insufficient for protecting business communications. Dedicated email security gateways can sandbox attachments, follow links in a safe environment, and block known-malicious domains before messages reach end users.
- Keep all systems and software patched and up to date. The majority of successful exploits target known vulnerabilities for which patches already exist. Operating system updates, application patches, and firmware updates should be applied promptly. Use automated patch management tools where possible.
- Treat unsolicited emails and calls requesting sensitive information as suspicious by default. Legitimate banks, cloud providers, and business partners do not ask for passwords, private keys, or payment card details via email or unsolicited phone calls. Establish a verification workflow for any request involving credentials, financial transfers, or system access.
- Engage qualified security professionals when incidents occur. Attempting to remediate a malware infection or breach without expertise risks incomplete cleanup, evidence destruction, and re-infection. Engage a managed security service provider (MSSP) or incident response firm when your business lacks in-house capability.
- Apply the principle of least privilege to cloud IAM. Grant users, services, and applications only the permissions they need to perform their function. Regularly audit IAM roles and remove unused credentials. Enable multi-factor authentication (MFA) on all administrative accounts.
- Audit cloud storage and service configurations regularly. Misconfigured cloud storage (publicly accessible S3 buckets, for example) is a leading cause of data exposure. Use cloud security posture management (CSPM) tools or built-in provider dashboards to detect and remediate misconfigurations.
Balancing Cloud Benefits Against Security Risk
The cloud offers genuine advantages—reduced capital expenditure, elastic scaling, geographic redundancy, and access to managed services that would be prohibitively expensive to build in-house. These benefits do not disappear because cybercriminals are also active in the cloud. Instead, they demand that organizations adopt a security posture that is as dynamic and automated as the infrastructure itself.
Shared responsibility is the foundational concept: your cloud provider secures the underlying infrastructure, but you are responsible for what runs on top of it—your data, your applications, your identities, and your configurations. Understanding and acting on that responsibility is the most important step any organization can take toward cloud security.
Key Takeaways
- Cloud environments are high-value targets because they concentrate large volumes of sensitive data in internet-accessible infrastructure.
- The most common attack vectors—phishing, malware, and social engineering—are not unique to the cloud but can have amplified impact when cloud admin credentials are compromised.
- Technical controls (patching, MFA, email filtering, CSPM) combined with employee awareness training form the core of an effective defense.
- The cloud’s shared responsibility model means security is a joint obligation between provider and customer—understanding the boundary between the two is essential.
- When an incident occurs, engage qualified professionals; amateur remediation frequently makes the situation worse.