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安全預警:警惕模塊化的惡意軟件

分類:科技智慧 瀏覽數:2 2019-06-27 12:51 IT觀察網 編輯: 厚學

  梭子魚網絡保護您的業務免受復雜多變的模塊化惡意軟件攻擊。

  梭子魚研究人員發現,自2019年初以來,模塊化惡意軟件的應用激增。最近一項對梭子魚用戶所遭受電子郵件攻擊的分析發現,今年頭5個月,已有超過15萬個獨特的惡意文件。

  下文將詳細闡述模塊化惡意軟件和相關解決方案,以幫助您進行檢測和阻止攻擊。

   模塊化惡意軟件 — 網絡罪犯通過電子郵件為載體發送模塊化惡意軟件,也稱為Modular Malware。模塊化惡意軟件呈現日益增長的趨勢,它具有比典型的文檔型或Web型惡意軟件更強大、更難以捉摸且更危險的體系結構。模塊化惡意軟件包括并可以選擇性地啟動不同的有效載荷和功能,這取決于攻擊的目標。

  大多數惡意軟件以文檔附件的形式進行傳播,以垃圾郵件的形式發送到被黑市販賣的電子郵件列表賬戶中。這些電子郵件列表賬戶在網絡黑市中被出售和交易。

  一旦打開被感染的文檔,惡意軟件就會自動安裝,或者使用高度模糊的宏/腳本從外部源下載并安裝惡意軟件。偶爾會使用鏈接或其它可點擊的項,這種方法在網絡釣魚攻擊中比在惡意軟件攻擊中更常見。

  隨著僵尸網絡的興起,執行網絡罪犯提供的命令和為廣泛傳播而編寫的惡意軟件,模塊化已成為新的規范。惡意軟件作者越來越有組織,并繼續采用和實施軟件行業的實踐,包括質量保證和測試,以提高攻擊的成功率。為了滿足廣泛分布的惡意軟件文件的多種需求,模塊化惡意軟件已經發展成為功能更加豐富和靈活的軟件。

  通常,模塊化惡意軟件包含一個非常基本的初始有效負載。一旦在系統上建立了立足點,該有效負載就連接到遠程C2(命令和控制)服務器,以獲得額外的有效負載。這允許C2服務器發送和處理關于系統的信息,并根據該信息選擇服務器側的額外有效負載,如果檢測到分析環境,則可能不選擇這些負載。這種方法已用于銀行木馬程序,包括Emotet、TrickBot和CoreBot,以及信息偷竊程序,包括LokiBot和Pony。

   檢測和阻止模塊化惡意軟件

  快速發展的威脅環境需要多層的保護策略——需要采取避免技術上和人員方面漏洞的一個完整和全面的綜合策略——使每個企業擁有最高的電子郵件安全性能,并把遭受復雜攻擊(如模塊化惡意軟件)的風險降到最低。

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