Vulnerability Management - Languages used to develop vulnerability signatures

1. Qualys ->
Qualys vulnerability signatures are primarily developed using a custom scripting language called Qualys Vulnerability Signature Language (VSL). This language is tailored to create vulnerability detection logic for the Qualys platform.
In addition to VSL, Qualys also integrates other common programming and scripting languages such as XML, Perl/Python, SQL, Shell scripting etc.

2. Tenable ->
Tenable vulnerability signatures are primarily developed using a proprietary language known as Nessus Attack Scripting Language (NASL). NASL is a lightweight scripting language designed specifically for creating vulnerability detection and assessment scripts for Tenable's Nessus vulnerability scanner.

NASL scripts are typically used in Tenable's products like Nessus, Tenable.io, and Tenable.sc for identifying vulnerabilities across networks, operating systems, applications, and configurations.

3. Rapid7 ->
Nexpose Simple Query Language (SQL), XML, Ruby, Java etc.

SQL and XML are key for defining vulnerability checks and reports, while Ruby is used for exploit verification, especially through the integration with Metasploit.

4. CrowdStrike Falcon ->
CrowdStrike Falcon Exposure Management (formerly known as Falcon Spotlight) leverages a cloud-native architecture for vulnerability management and uses a combination of proprietary and open-source technologies. However, CrowdStrike does not publicly disclose a specific scripting language for creating vulnerability signatures in the same way that platforms like Qualys (VSL) or Tenable (NASL) do.

5. Microsoft Defender Vulnerability Management ->
It uses a combination of proprietary technologies and existing Microsoft tools for creating and managing vulnerability signatures. Although Microsoft does not explicitly disclose a specific language for writing vulnerability signatures, the platform's detection and vulnerability assessment are built using a combination of languages such as PowerShell, WQL, Azure Cloud-based Analytics, C/C++, C#, JSON and XML etc.

In summary, the key technologies include PowerShell, WQL, and cloud-based analytics, with core engine components in C/C++ and C#, but there is no single, dedicated scripting language like NASL (Tenable) or VSL (Qualys) for vulnerability signatures in Microsoft Defender.

Happy Learning !!

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