Access to source code of well-known technology companies is usually protected by law, and unauthorized access may result in legal consequences. In addition to social engineering, here are some other possible but illegal or unethical ways. Please note that these ways seriously violate ethics and laws: 1. **Cyber attack**: Attackers may obtain source code by hacking into company servers, developers' personal devices, or undisclosed projects on code hosting platforms such as GitHub. 2. **Insider leaks**: In some cases, internal employees may intentionally or accidentally leak source code. 3. **Supply chain attack**: Attackers may obtain source code through third-party suppliers or tools in the supply chain. 4. **Loss or theft of storage media**: In the case of accidental loss or theft of equipment by company employees, unencrypted source code may be improperly obtained. 5. **Vulnerabilities and misconfigurations**: Unfixed vulnerabilities or misconfigured servers, databases, etc. may also become entry points, allowing attackers to access internal resources. It is emphasized that unauthorized access to other people's intellectual property is not only unethical, but also illegal. Companies usually take strict security measures to protect their source code, such as access control, encryption, data loss prevention, and employee security awareness training. Legally obtaining company code can usually only be done safely and legally with the company's explicit permission or through an open source license.