安卓金融木馬Octo2鎖定歐洲國家,接管受害裝置
支付動態 · 2024-09-26

研究人員針對安卓金融木馬Octo2攻擊行動提出警告,指出雖然駭客目前僅用於攻擊部分國家,但在開發團隊積極向買家推廣的情況下,全球很可能都會出現相關攻擊

研究人員表示,開發該惡意程式的犯罪集團正積極推廣駭客運用,起因是今年發布第一代Octo的原始碼外流,導致有其他駭客開發衍生版本瓜分原本使用Octo的駭客。因此,原開發團隊積極發布新的Octo2,並對該惡意程式持續進行改良,目的就是希望吸引用戶回頭。

Octo2主要改進的層面當中,大多集中於遠端控制連線及裝置接管攻擊的程式穩定性,其中一種是能夠藉由減少網路傳輸到C2的資料量,,並降低惡意程式傳送到C2的螢幕截圖品質,而能提高連線的穩定性。

但除了上述的運作穩定性,駭客導入更刁鑽的手法來迴避偵測也相當值得留意,新版惡意程式駭客實作更為複雜的混淆機制,其啟動過程必須解密、動態載入額外的本機程式庫,然後密碼有效酬載、產生加密金鑰,以及C2網域名稱,而其中的C2網域名稱,駭客以日期為基礎,打造一種網域名稱生成演算法(DGA),來產生C2伺服器的名稱。

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