惡意軟體WikiLoader透過SEO中毒散布,駭客聲稱提供特定資安業者VPN軟體作為誘餌
支付動態 · 2024-09-05

使用資安業者Palo Alto Networks的SSL VPN服務GlobalProtect作為誘餌的攻擊行動再添一樁,該公司的威脅情報團隊Unit 42指出,駭客將其用來散布惡意程式載入工具WikiLoader

而這個檔案解壓縮後,使用者很可能只看到執行檔GlobalProtect64.exe,但研究人員指出,實際上ZIP檔裡含有超過400個檔案,大部分都設為隱藏。若是使用者執行上述執行檔,駭客就會使用DLL側載手法載入第1個WikiLoader元件。

接著,該DLL元件載入其他模組,並解開Shell Code,注入Windows檔案總管的處理程序。

而被注入的程式碼將C2伺服器進行通訊,駭客利用遭駭的WordPress網站充當C2,並使用物聯網裝置常見的通訊協定MQTT連線。

之後,這些被注入的程式碼又被載入Sysinternals公用程式元件,然後從C2伺服下載WikiLoader後門程式,並透過側載的方式執行。但究竟後續駭客藉由WikiLoader在受害電腦植入那些惡意軟體,研究人員表示不清楚。

研究人員提及,攻擊者運用使用者習以為常的錯誤訊息,防止察覺異狀。例如,前述安裝程式並不會真的部署GlobalProtect,而駭客在完成惡意程式載入後,會顯示特定程式庫遺失而無法完成安裝的錯誤訊息,藉此避免使用者起疑。

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