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PROFESSIONAL-SECURITY-OPERATIONS-ENGINEER · Question #85

You have a close relationship with a vendor who reveals to you privately that they have discovered a vulnerability in their web application that can be exploited in an XSS attack. This application is

The correct answer is A. Create a YARA-L 2.0 rule to detect a time-ordered series of events where an external inbound. The correct approach is to create a YARA-L 2.0 rule that detects a sequence of events where an external inbound connection to a server is followed by a process spawning previously unseen subprocesses. This behavior-based detection can identify potential exploitation of the XSS vu

Threat Hunting and Detection Engineering

Question

You have a close relationship with a vendor who reveals to you privately that they have discovered a vulnerability in their web application that can be exploited in an XSS attack. This application is running on servers in the cloud and on-premises. Before the CVE is released, you want to look for signs of the vulnerability being exploited in your environment. What should you do?

Options

  • ACreate a YARA-L 2.0 rule to detect a time-ordered series of events where an external inbound
  • BCreate a YARA-L 2.0 rule to detect high-prevalence binaries on your web server architecture
  • CAsk the Gemini Agent in Google Security Operations (SecOps) to search for the latest
  • DActivate a new Web Security Scanner scan in Security Command Center (SCC), and look for

How the community answered

(36 responses)
  • A
    72% (26)
  • B
    17% (6)
  • C
    8% (3)
  • D
    3% (1)

Explanation

The correct approach is to create a YARA-L 2.0 rule that detects a sequence of events where an external inbound connection to a server is followed by a process spawning previously unseen subprocesses. This behavior-based detection can identify potential exploitation of the XSS vulnerability in your environment before a CVE is publicly released, without relying on signatures or external threat intelligence.

Topics

#XSS detection#YARA-L rules#proactive threat hunting#pre-CVE detection

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