Detect Mitigate Potential Specula Exploitation

Query

// Detect & mitigate potential Specula Exploitation
// https://www.linkedin.com/posts/activity-7223926720356044800-fxX2/

Custom NRT DefenderXDR detection & isolation of endpoint to prevent exploitation of red team post-exploitation framework (Specula)

DeviceRegistryEvents
| where RegistryKey contains "\\Software\\Microsoft\\Office" and RegistryKey contains "\\Outlook\\webview"
| where RegistryValueName contains "URL"
| where RegistryValueData contains "http://" or RegistryValueData contains "https://"

// MITRE ATT&CK Mapping

// This query can be associated with the following MITRE ATT&CK techniques:

// T1112 - Modify Registry:
// The query detects changes to the registry, which is a common technique used by adversaries to maintain persistence or execute malicious code1.

// T1071.001 - Application Layer Protocol: Web Protocols:
// By looking for URLs in registry values, the query can help identify the use of web protocols for command and control or data exfiltration2.

// T1137.001 - Office Application Startup: Outlook:
// The focus on Outlook’s webview settings suggests a potential technique where adversaries manipulate Office application settings to execute malicious code or scripts3.

Explanation

This query is designed to detect and prevent potential exploitation activities related to a post-exploitation framework called Specula. It specifically targets suspicious changes in the Windows registry that could indicate malicious activity involving Microsoft Office and Outlook.

Here's a simple breakdown of what the query does:

Targeted Registry Keys: It looks for changes in the Windows registry under paths related to Microsoft Office and Outlook's webview settings.
Suspicious Registry Values: It checks if these registry entries contain URLs (web addresses) that start with "http://" or "https://". This could indicate that a malicious actor is trying to use web protocols for harmful purposes.
Potential Threats Detected:
- Modify Registry (T1112): The query identifies changes to the registry, which is a common method used by attackers to maintain control over a system or execute harmful code.
- Application Layer Protocol: Web Protocols (T1071.001): By detecting URLs in registry values, the query helps identify the use of web protocols for potentially malicious activities like command and control or data theft.
- Office Application Startup: Outlook (T1137.001): The focus on Outlook settings suggests that attackers might be trying to manipulate Office applications to run malicious scripts or code.

Overall, this query is part of a security measure to detect and isolate potentially compromised endpoints, preventing further exploitation by malicious actors.