# 2020-12 Solarwind supply chain * A Widespread breach that affected many public and private org around the world * Gain access to victims through Trojanized updates to Solarwind's Orion IT Monitoring and management software ## How? * An legit .dll component (digitally signed component of Orion software framework) has backdoor * The backdoor can make HTTP communications to third party servers. * The backdoor is capable of performing recon, profiling system, disable system services, transfer, execute files * Hides network traffic behind a known protocol (Orion Improvement Protocol) to blend in with on going activities * Hides recon results within legitimate configuration files with other Solarwind activities. ## Behavior? * Uses multiple obfuscated blocklist to identify forensic and antivirus tools running as processes, services and drivers. * It sits dormant for 2 weeks, before "waking up" to retrieve and execute "jobs" from their C2. * It resolves to a subdomain of "avsvmcloud.com" after waking up where the DNS response will return a CNAME record that points to a C2 domain. * The C2 traffic to the malicious domain is designed to mimic normal SolarWinds API commuinications * The list of known malicious infrastructure is available on FireEye’s [GitHub page](https://github.com/fireeye/sunburst_countermeasures). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://refabr1k.gitbook.io/oscp/zeroday-vulnerabilities-explained/solarwind.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.