RondoDox Botnet on the Rise: Exploiting Hundreds of CVEs to Launch Large-Scale DoS/DDoS Attacks

Cybersecurity experts have recently observed a rapid increase in a new attack campaign involving the RondoDox botnet, a newly identified botnet capable of exploiting numerous known vulnerabilities (CVEs) to launch large-scale and highly sophisticated Denial-of-Service (DoS/DDoS) attacks.

The emergence of RondoDox highlights a concerning trend: attackers are increasingly leveraging unpatched, known vulnerabilities to build powerful attack infrastructures, rather than relying solely on zero-day exploits.

What is RondoDox Botnet?

RondoDox is a sophisticated botnet designed to compromise vulnerable internet-connected devices such as routers, IP cameras, IoT devices, and unpatched servers. Once infected, these devices are turned into bots and become part of a distributed attack network.

One of its most dangerous capabilities is the ability to automatically scan and exploit hundreds of known CVEs, enabling rapid propagation and large-scale infection within a short time.

RondoDox - A Dangerous Botnet Variant - Source: AdSecVN

Typical Attack Workflow

The typical operation process includes:

1. Mass Scanning:The botnet continuously scans the Internet to identify devices with unpatched CVE vulnerabilities.

2. Exploitation:It leverages hundreds of publicly disclosed vulnerabilities, particularly targeting:

3. Routers

4. IP cameras

5. IoT devices

6. Web servers and network services

7. Infection:Once successfully exploited, the device is infected with malware and becomes part of the botnet.

8. Command & Control (C2):Infected devices receive instructions from a central command server to simultaneously launch DoS/DDoS attacks.

Use of Residential IPs to Evade Detection

A key feature that makes RondoDox particularly dangerous is its use of compromised residential IP addresses. Unlike traditional botnets that rely on data center IPs, residential IPs appear more legitimate and are significantly harder to detect and block.

This tactic allows attackers to:

• Bypass traditional security filters

• Increase the credibility of malicious traffic

• Complicate attribution and mitigation efforts

Why Are Old CVE Vulnerabilities Still Being Exploited?

Old CVE vulnerabilities continue to be actively exploited primarily because many organizations lack effective security patch management processes. Delayed patching, unmanaged IoT devices, and IT infrastructures relying on outdated hardware or firmware create persistent security gaps within systems.

In addition, the absence of proper IT Asset Management makes it difficult for organizations to track, monitor, and identify potential vulnerabilities across their environments.

For attackers, publicly disclosed vulnerabilities are often preferred targets because they are easier to exploit, widely documented, and often have readily available exploit code. This allows them to achieve higher success rates, rapidly expand botnet networks, and launch large-scale attack campaigns.

Impact and risks for organizations

Risks to businesses from the spread of the RondoDox Botnet - Source: AI

RondoDox can be leveraged to conduct high-volume DoS/DDoS attacks, leading to severe consequences for businesses:

• Service disruption: Websites, applications, or internal systems become unavailable

• Performance degradation: Systems slow down due to excessive traffic

• Financial and reputational damage: Loss of revenue and customer trust

• Multi-stage attacks: DoS attacks may act as a distraction for more sophisticated intrusions

Security recommendations

To mitigate the risks posed by RondoDox, organizations should adopt the following security measures:

1. Patch Management

Ensure all systems, applications, and network devices are updated with the latest security patches to eliminate known vulnerabilities.

2. Network Monitoring

Deploy advanced monitoring tools to detect unusual traffic patterns and potential DoS activity in real time.

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3. Secure IoT and Network Infrastructure

• Change default credentials

• Disable unnecessary services

• Implement network segmentation

4. Multi-layered Security Approach

Combine firewalls, IDS/IPS, and DDoS protection solutions to strengthen overall defense.

5. Regular Vulnerability Assessments

Conduct vulnerability scanning and penetration testing to identify and remediate security gaps proactively.

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The rapid spread of the RondoDox botnet highlights the critical importance of timely patching and proactive cybersecurity practices. As cyber threats continue to evolve, organizations must strengthen their defenses through continuous monitoring, layered security strategies, and regular system updates to minimize potential risks.

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Reference: AdSecVN, RondoDox Botnet: Mối Đe Dọa DoS Nghiêm Trọng Qua Lỗ Hổng CVE