駭客組織8220鎖定Oracle WebLogic伺服器已知漏洞而來,透過PowerShell指令碼散布挖礦軟體
支付動態 · 2024-07-03

資安業者趨勢科技針對中國駭客組織8220最新一波的攻擊行動提出警告,特別的是,這些駭客採用分階段載入與執行酬載的攻擊手法,並對於有效酬載進行混淆處理,使得防守方要察覺攻擊意圖變得更加困難

接著,載入工具在特定檔案路徑建立名為cvtres.exe的處理程序,並將下一階段的有效酬載以處理程序注入的手法,載入記憶體並啟動新的處理程序,執行名為PureCrypter的惡意程式載入工具。

這個惡意程式載入工具連線至C2伺服器,並將受害電腦進行註冊,從而下載包含XMRig在內的最終有效酬載。

研究人員指出,PureCrypter不僅能隱藏自身,並配置在系統啟動或使用者登入電腦的時候自動執行,並能建立隱藏排程執行PowerShell命令,從而將特定檔案列為防毒軟體Microsoft Defender的白名單。值得一提的是,為了防範研究人員逆向工程,駭客對於所有的有效酬載,皆透過.NET程式碼保護軟體.NET Reactor進行處理。

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