Malicious URL Observed

This document describes a threat finding type in Security Command Center. Threat findings are generated by threat detectors when they detect a potential threat in your cloud resources. For a full list of available threat findings, see Threat findings index.

Overview

Cloud Run Threat Detection observed a malicious URL in the argument list of an executable process. Attackers can load malware or malicious libraries through malicious URLs.

Detection service

Cloud Run Threat Detection

How to respond

To respond to this finding, do the following:

Review finding details

  1. Open the Malicious URL Observed finding as directed in Reviewing findings. Review the details on the Summary and JSON tabs.

  2. On the Summary tab, review the information in the following sections:

    • What was detected, especially the following fields:
      • URI: the malicious URI observed
      • Added binary: the full path of the process binary that received the arguments that contain the malicious URL
      • Arguments: the arguments provided when invoking the process binary
      • Environment variables: the environment variables that were in effect when the process binary was invoked
      • Containers: the name of the container
    • Affected resource, especially the following fields:
      • Resource display name: the name of the affected resource
      • Resource full name: the full resource name of the affected Cloud Run resource
    • Related links, especially the following field:
      • VirusTotal indicator: link to the VirusTotal analysis page

  3. Look for related findings that occurred at a similar time for the affected container. Such findings might indicate that this activity was malicious, instead of a failure to follow best practices.

  4. Review the settings of the affected container.

  5. Check the logs for the affected container.

Research attack and response methods

  1. Check Safe Browsing site status to get details on why the URL is classified as malicious.
  2. Review the MITRE ATT&CK framework entry for this finding type: Ingress Tool Transfer.
  3. Check the SHA-256 hash value for the binary flagged as malicious on VirusTotal by clicking the link in VirusTotal indicator. VirusTotal is an Alphabet-owned service that provides context on potentially malicious files, URLs, domains, and IP addresses.
  4. To develop a response plan, combine your investigation results with the MITRE research and VirusTotal analysis.

Implement your response

For response recommendations, see Respond to Cloud Run threat findings.

What's next