Matrix Push: How Browser Notifications Became a C2 Weapon in 2024
Executive Summary
In early 2024, cybersecurity researchers reported that a threat actor group leveraged a new Command and Control tool—dubbed 'Matrix Push'—to hijack web browser notifications as an innovative phishing and persistence mechanism. Attackers delivered malicious payloads through deceptive websites, tricking users into allowing browser notifications. These notifications were abused to send phishing lures and exfiltrate user information, evading traditional network monitoring tools by using trusted browser channels. The campaign allowed remote control and persistent access to compromised endpoints, highlighting a shift toward social engineering at the browser level. Organizations targeted included enterprises in technology, finance, and professional services sectors, resulting in elevated risks of credential theft and lateral movement.
This incident is especially notable for exploiting a trusted browser feature in new ways, bypassing established email and endpoint filtering controls. As browser notification-based attacks surge, security teams face increased pressure to adapt controls. The tactics highlight the urgent need for enhanced user awareness and modern segmentation/visibility solutions that can identify and mitigate covert browser-based C2 channels.
Why This Matters Now
Browser notification abuse represents an emerging threat vector that can circumvent conventional defense layers, enabling persistent attacker control with minimal technical indicators. Organizations should prioritize monitoring new avenues of C2 activity, enhance user education around browser features, and revisit network segmentation policies to mitigate evolving social engineering and phishing techniques.
Attack Path Analysis
Attackers initiated their campaign via phishing emails, leveraging malicious browser notifications to gain initial user access. After compromise, the adversary likely exploited session tokens or browser permissions to escalate access. Lateral movement within the cloud or endpoint infrastructure may have occurred via compromised browser sessions or misuse of access tokens. The attackers established command and control communications using the Matrix Push C2 tool, hiding C2 traffic within legitimate browser notification channels. Data exfiltration or further payload retrieval could have been achieved across these covert channels. Ultimately, attackers could deliver additional malicious actions, such as deploying ransomware, manipulating data, or maintaining persistent access.
Kill Chain Progression
Initial Compromise
Description
Phishing emails containing malicious browser notification requests were sent to users, tricking them into allowing notifications, which enabled attackers to initiate access.
Related CVEs
CVE-2025-59287
CVSS 9.8A vulnerability in Microsoft Windows Server Update Services (WSUS) allows remote code execution, enabling attackers to deploy malware such as ShadowPad.
Affected Products:
Microsoft Windows Server Update Services – All versions prior to the patched release
Exploit Status:
exploited in the wild
MITRE ATT&CK® Techniques
Phishing
User Execution
Browser Push Notification Abuse
Web Protocols
Data Encoding
Command and Scripting Interpreter
Impair Defenses
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – User Authentication Mechanisms
Control ID: 8.3.1
NYDFS 23 NYCRR 500 – Cybersecurity Policy
Control ID: 500.03
DORA – ICT Risk Management Framework
Control ID: Art 9
CISA ZTMM 2.0 – Network and Communication Channels
Control ID: Network Segmentation & Least Privilege
NIS2 Directive – Technical and Organizational Measures
Control ID: Article 21.2
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Banking/Mortgage
Browser notification hijacking enables command and control bypassing traditional security, threatening encrypted traffic and egress filtering critical for financial compliance.
Health Care / Life Sciences
Matrix Push C2 tool exploits user trust in notifications to establish persistent access, compromising HIPAA-required visibility and threat detection capabilities.
Financial Services
Phishing through hijacked browser notifications creates covert communication channels, evading zero trust segmentation and anomaly detection systems protecting sensitive data.
Government Administration
Command and control via browser notifications bypasses government security controls, undermining encrypted traffic monitoring and east-west traffic security requirements.
Sources
- 'Matrix Push' C2 Tool Hijacks Browser Notificationshttps://www.darkreading.com/threat-intelligence/matrix-push-c2-tool-hijacks-browser-notifications-phishingVerified
- Matrix Push C2 abuses browser notifications to deliver phishing and malwarehttps://www.malwarebytes.com/blog/news/2025/11/matrix-push-c2-abuses-browser-notifications-to-deliver-phishing-and-malwareVerified
- New Matrix Push C2 Abuses Push Notifications to Deliver Malwarehttps://www.blackfog.com/new-matrix-push-c2-deliver-malware/Verified
- Cybercriminals Exploit Browser Push Notifications to Deliver Malwarehttps://www.infosecurity-magazine.com/news/browser-push-notifications-deliver/Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
CNSF controls such as Zero Trust Segmentation, East-West Traffic Security, Egress Security, Inline IPS, and real-time threat detection could have contained the attack early, limited lateral movement, and blocked covert command and control or exfiltration via browser notifications.
Control: Threat Detection & Anomaly Response
Mitigation: Anomalous browser notification requests could be detected and alerted rapidly.
Control: Zero Trust Segmentation
Mitigation: Least-privilege access policies would block lateral privilege escalation paths.
Control: East-West Traffic Security
Mitigation: Microsegmentation restricts east-west connections from compromised users.
Control: Inline IPS (Suricata)
Mitigation: Inline IPS flags and blocks suspicious C2 patterns in notification traffic.
Control: Egress Security & Policy Enforcement
Mitigation: Outbound data exfiltration is blocked to unauthorized domains.
Real-time inline enforcement stops malicious commands or payloads from executing.
Impact at a Glance
Affected Business Functions
- User Communications
- Web Browsing
- System Security
Estimated downtime: 3 days
Estimated loss: $50,000
Potential exposure of user credentials, personal information, and financial data through phishing attacks facilitated by malicious browser notifications.
Recommended Actions
Key Takeaways & Next Steps
- • Implement Zero Trust Segmentation to restrict browser session scope and prevent privilege escalation.
- • Enforce strict east-west traffic controls and microsegmentation to block lateral movement from compromised users.
- • Apply egress traffic filtering and FQDN allowlisting to prevent covert command and control or data exfiltration.
- • Deploy inline IPS and threat detection systems to identify and stop browser-based C2 and phishing campaigns.
- • Centralize cloud visibility and automate real-time enforcement using a cloud-native security fabric for rapid response.
