殭屍網絡潛伏233萬電腦10年 Coreflood針對微軟視 全球盜億美元

殭屍網絡潛伏233萬電腦10年 Coreflood針對微軟視 全球盜億美元
(明報)2011年4月15日 星期五 05:05
【明報專訊】美國    聯邦調查局    和司法部聯手進行歷來針對電腦「殭屍網絡」（Botnet）的最徹底和周詳行動，搗破一個潛伏全球超過200萬部電腦達10年的龐大電腦犯罪集團，拘捕了13名外國疑犯。集團成員涉嫌在中招電腦內安裝惡意程式，盜走多達1億美元    （約7.8億港元）。

美國司法部周三表示，查封5個大型伺服器和29個域名，成功封搗一個名為「Coreflood」的殭屍網絡。當局估計，Coreflood於2002年起出現，程式可記錄被感染電腦上的按鍵輸入與私人通訊，包括登入名稱、密碼或其他私人資訊等，並可由遠端電腦下達命令加以操控。其中一個例子是，Coreflood接管進入網上銀行程式，進而將使用者銀行戶口的款項轉至國外帳戶。

盜電郵網銀密碼遙控轉帳

截至今年2月，全球被Coreflood控制的電腦超過233萬部，當中185萬部在美國。文件顯示，密歇根州一間房地產公司，銀行戶口被調走11.6萬美元（約90.2萬港元），北卡羅來納州一間投資公司損失15.1萬美元（約118萬港元），田納西州一間國防企業更被調走了24.2萬美元（約189萬港元）。電腦防毒公司McAfee Labs研究及通訊部總裁馬庫斯（Dave Marcus）說：「現在很難評估涉及總金額，但罪犯很可能已取得數以千萬美元計資金。說他們偷走超過1億美元也非不可能。」

康涅狄格州檢察官對13名被捕者提出民事訴訟，他們身分未被公開，當局只稱他們都是外國人。

聲稱首先發現Coreflood的Dell SecureWorks表示，Coreflood源自俄羅斯    ，幕後操控者少至只有3人，他們特別針對使用微軟    視窗系統的企業電腦，偷取私人電郵和機密財務資料，中招企業包括美國政府合約商、州警局和大型連鎖酒店集團。

源自俄國 3人幕後操控

當局已按照法院發出的臨時禁制令，「以其人之道還治其人之身」，利用殭屍網絡的伺服器，遙控關閉中招電腦的病毒程式，是當局首次獲准遙控關閉中招電腦病毒程式。

司法部指出，雖然今次行動關閉了Coreflood殭屍網絡，但並不代表其他類似的惡意程式會消失，呼籲網民定期更新防毒軟件。微軟表示，旗下防病毒程式已更新，讓電腦可以刪除Coreflood程式。

法新社/美國廣播公司/彭博通訊社

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