Execution: Modified Malicious Library Loaded

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

A library that is included in the original container image was loaded. The library was modified during the container runtime and was identified as malicious based on threat intelligence.

Attackers might load malicious libraries into existing programs to bypass code execution protections and to hide malicious code.

Detection service

Cloud Run Threat Detection

How to respond

To respond to this finding, do the following:

Review finding details

  1. Open the Execution: Modified Malicious Library Loaded 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:
      • Program binary: the full path of the process binary that loaded the library
      • Libraries: details about the modified library
      • Arguments: the arguments provided when invoking the process binary
      • Containers: the name of the affected container
      • Containers URI: the name of the container image being deployed
    • Affected resource, especially the following fields:
    • Related links, especially the following fields:
      • 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. Review the MITRE ATT&CK framework entries for this finding type: Ingress Tool Transfer and Shared Modules.
  2. 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.
  3. 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