Introduction
Ransomware attacks exploiting unpatched SimpleHelp Remote Monitoring and Management (RMM) software are a critical threat to businesses in 2025. Cybercriminals are using vulnerabilities in this widely used remote access tool to infiltrate networks, encrypt data, and demand hefty ransoms. A recent attack on a utility billing software provider showed how these threats can ripple through supply chains, disrupting operations and eroding trust. This article explains how these attacks work, their current impact, and practical steps businesses can take to protect themselves.
What Is SimpleHelp RMM and Why Is It Targeted?
SimpleHelp is a legitimate RMM tool used by IT teams to manage and troubleshoot systems remotely. It’s popular among small and medium-sized businesses for its affordability and ease of use. However, unpatched versions of SimpleHelp contain vulnerabilities that allow attackers to gain unauthorized access to networks. Once inside, they deploy ransomware—malicious software that locks critical files and demands payment for decryption. The Cybersecurity and Infrastructure Security Agency (CISA) reported in June 2025 that these attacks have been active since January, targeting industries like utilities and healthcare.
How Do These Ransomware Attacks Work?
Attackers exploit unpatched SimpleHelp installations by scanning for vulnerable servers exposed to the internet. Once they identify a target, they use known vulnerabilities to gain initial access. From there, they escalate privileges, often by exploiting weak credentials or misconfigured systems. The attackers then deploy ransomware payloads, encrypting files and disrupting operations. In some cases, they also steal sensitive data to increase pressure on victims to pay the ransom. The recent compromise of a utility billing software provider, as noted in CISA’s advisory, showed how attackers used SimpleHelp to target downstream customers, amplifying the damage.
Current Status of the Threat
As of June 2025, CISA’s advisory AA25-163A confirms that ransomware attacks exploiting SimpleHelp are ongoing, with active exploitation in critical infrastructure sectors. The advisory highlights a specific incident where a utility billing software provider’s customers were hit, causing widespread disruption. Attackers are increasingly combining ransomware with data theft, threatening to leak sensitive information if ransoms aren’t paid. This dual-threat approach makes these attacks particularly damaging, as businesses face both operational downtime and potential regulatory fines for data breaches.
Why This Matters to Your Business
Ransomware attacks via SimpleHelp can cripple businesses of any size. Small businesses may lack the resources to recover from encrypted systems, while larger enterprises risk supply chain disruptions or reputational damage. For example, the utility billing provider attack affected multiple organizations, showing how one vulnerable link can impact an entire ecosystem. Beyond financial losses, businesses face legal and compliance risks if customer data is exposed. With attackers actively exploiting unpatched systems, inaction is not an option.
Practical Defenses Against SimpleHelp Ransomware Attacks
Businesses can take immediate steps to mitigate this threat. Here are actionable defenses to protect your organization:
- Patch SimpleHelp Immediately
Check if your organization uses SimpleHelp RMM and ensure it’s updated to the latest version. SimpleHelp has released patches for known vulnerabilities, and applying them closes the entry point for attackers. Visit the official SimpleHelp support page for the latest updates. - Limit Remote Access Exposure
Restrict SimpleHelp servers from being publicly accessible on the internet. Use firewalls to limit access to trusted IP addresses only. If remote access is necessary, implement a virtual private network (VPN) with multi-factor authentication (MFA) to secure connections. - Strengthen Credentials and Access Controls
Enforce strong, unique passwords for all accounts associated with SimpleHelp. Enable MFA wherever possible to prevent attackers from exploiting stolen credentials. Regularly review user permissions to ensure only authorized personnel have access. - Monitor and Segment Networks
Deploy network monitoring tools to detect unusual activity, such as unexpected data transfers or privilege escalations. Segment your network to limit the spread of ransomware if an attacker gains access. Critical systems should be isolated from less secure areas. - Back Up Data Regularly
Maintain offline or air-gapped backups of critical data to ensure you can recover without paying a ransom. Test backups regularly to verify they are functional and not corrupted. CISA emphasizes that reliable backups are one of the most effective defenses against ransomware. - Train Employees on Phishing Awareness
Attackers often combine SimpleHelp exploits with phishing emails to trick users into providing credentials. Train employees to recognize suspicious emails and avoid clicking unverified links. Regular training can reduce the risk of human error. - Work with Trusted Vendors
If your business relies on third-party providers using SimpleHelp, verify that they’ve patched their systems. The utility billing provider attack showed how supply chain vulnerabilities can affect customers. Ask vendors for proof of security updates and compliance.
What to Do If You’re Attacked
If your business is hit by a ransomware attack, avoid paying the ransom, as it doesn’t guarantee data recovery and funds further criminal activity. Instead, isolate affected systems immediately to prevent further spread. Contact a cybersecurity professional to assess the damage and restore systems from backups. Report the incident to CISA or your local authorities, as this helps track and combat the threat. CISA’s StopRansomware.gov provides resources for victims, including reporting tools and recovery guidance.
The Bigger Picture: Staying Ahead of Ransomware
Ransomware attacks exploiting tools like SimpleHelp are part of a broader trend of cybercriminals targeting remote access software. As businesses increasingly rely on remote tools for hybrid work, attackers see these as low-hanging fruit. Staying proactive with patches, monitoring, and employee training is critical. CISA’s June 2025 advisory underscores the need for organizations to prioritize cybersecurity hygiene, especially for critical infrastructure and supply chains.
Conclusion
Ransomware attacks exploiting unpatched SimpleHelp RMM software are a clear and present danger to businesses in 2025. With active exploitation reported as recently as June, organizations must act swiftly to patch systems, secure remote access, and back up data. By implementing these practical defenses, businesses can reduce their risk and avoid the devastating consequences of ransomware. Stay informed through trusted sources like CISA and take immediate steps to protect your network today.
