https://malware.guide/%eb%9e%9c%ec%84%ac%ec%9b%a8%ec%96%b4/gapo-%eb%9e%9c%ec%84%ac%ec%9b%a8%ec%96%b4-%ec%a0%9c%ea%b1%b0gapo-%ed%8c%8c%ec%9d%bc-%ec%95%94%ed%98%b8-%ed%95%b4%eb%8f%85/