A Webhook attack is a technique used by threat actors to gain unauthorized access to a target's web application and exfiltrate data from it.
In this type of attack, the attacker gains access to the victim's web application and installs a malicious webhook, which is a piece of code that is executed whenever a specific event occurs on the web application.
The webhook is designed to exfiltrate data from the victim's web application and transmit it to a remote server controlled by the attacker.
The data exfiltrated can include sensitive information such as user credentials, customer data, or financial information.
Webhook attacks can be used to bypass outbound traffic control because the exfiltrated data is transmitted through legitimate channels that are often used by the web application.
This makes it difficult for traditional network security tools to detect the exfiltration of data.
ID:T0156
Type:Technique
Tactic:Exfiltration
Summary:Exfiltration over webhooks
State:Draft
Mitigations
ID
TYPE
SUMMARY
DESCRIPTION
M1550
Mitigation
Mitigation Implement strict access control for clouds Limit access to cloud resources to only authorized users and ensure that proper authentication and authorization mechanisms are in place.
Mitigation Implement strict access control for clouds Limit access to cloud resources to only authorized users and ensure that proper authentication and authorization mechanisms are in place.
M1560
Mitigation
Mitigation Regularly audit webhooks Organizations should regularly review and audit the webhooks used in their web applications to identify any unauthorized or malicious ones.
Unused webhooks should be deleted, and new ones should be approved only after careful review.
M1561
Mitigation
Mitigation Monitor outbound traffic Organizations should monitor outbound traffic from their web applications for any unusual or suspicious activity, such as large data transfers or connections to unfamiliar IP addresses.
Mitigation Monitor outbound traffic Organizations should monitor outbound traffic from their web applications for any unusual or suspicious activity, such as large data transfers or connections to unfamiliar IP addresses.
M1562
Mitigation
Mitigation Implement access controls for webhooks Access controls should be implemented to limit the number of users who can create and modify webhooks.
Strong authentication and authorization mechanisms should also be implemented to prevent unauthorized access to the web application.
M1563
Mitigation
Mitigation Use data encryption for webhooks Data transmitted through webhooks should be encrypted to prevent eavesdropping and interception by attackers.
Mitigation Use data encryption for webhooks Data transmitted through webhooks should be encrypted to prevent eavesdropping and interception by attackers.
Detections
ID
TYPE
SUMMARY
DESCRIPTION
D1510
Detection
Detection Implement Intrusion Detection System and anti-malware An intrusion detection system (IDS) is a security tool designed to detect and alert on unauthorized access to a computer system or network.
Implementing intrusion detection systems (IDS) and anti-malware software can help to identify and block malicious activity. IDS is a critical security tool that helps organizations to detect and respond to security incidents in a timely manner. By providing real-time monitoring and analysis of network traffic, IDS can help organizations to stay ahead of potential threats and reduce the risk of a security breach.
D1520
Detection
Detection Implement endpoint detection and response system An endpoint detection and response (EDR) system is a security tool designed to detect and respond to security incidents on endpoints, such as desktops, laptops, servers, and mobile devices.
There are several reasons why an EDR system is essential for maintaining the security of endpoints: 1. Threat Detection: EDR can detect and alert on a wide range of threats, including malware, ransomware, and other types of attacks that may not be detected by traditional antivirus software. 2. Rapid Incident Response: EDR can help security teams to rapidly detect, investigate, and respond to security incidents on endpoints. EDR systems can provide detailed information about the scope and impact of an attack, enabling security personnel to respond quickly and effectively. 3. Behavioral Analysis: EDR can monitor endpoint behavior to detect and alert on suspicious or anomalous activity. This helps security teams to identify and respond to threats that may be missed by traditional signature-based detection. 4. Endpoint Visibility: EDR provides visibility into endpoint activity, including processes, network connections, and file activity. This helps security teams to identify potential attack vectors and take proactive measures to prevent future incidents.
D1590
Detection
Detection Implement continuous monitoring and logging of the CI/CD process Continuous monitoring and logging of the CI/CD process can help organizations detect any unusual activities or deviations from the standard workflow.
This can include monitoring the pipeline for unusual resource requests or unauthorized access attempts, as well as analyzing logs for unusual activity that may indicate a potential security breach. By establishing a baseline of normal behavior and regularly comparing it to current activity, organizations can quickly identify and respond to any anomalous behavior. Implementing automated alerts and notifications for suspicious activity can also help security teams respond promptly to potential threats.
AppSec teams are overwhelmed by useless alerts, managing numerous applications with vulnerabilities across various kill-chain stages, making them increasingly susceptible to successful attacks.
