使用竊資軟體Lumma Stealer、Connecio的駭客加入利用CrowdStrike更新大當機為幌子的行列
支付動態 · 2024-07-25

資安業者CrowdStrike再度針對駭客藉由電腦更新大當機事故做為誘餌的網路攻擊提出警告,這次駭客假借提供CrowdStrike的EDR用戶當機復原工具的名義,散布竊資軟體Lumma Stealer、Connecio

一旦使用者執行CrowdStrike Falcon.exe,電腦就會進行解壓縮作業,呼叫以Python程式語言打造的竊資軟體Connecio。此竊資軟體會收集電腦系統資訊、多種瀏覽器資料,以及系統的外部IP位址資訊。

而這款竊資軟體取得與C2連線資訊的方式,是向特定的Pastebin網址取得C2伺服器組態,並藉由SMTP郵件帳號,外傳竊得的資料。

針對加密貨幣錢包的部分,這些駭客疑似藉由剪貼簿挾持的方式進行,並使用Python程式庫來控制受害電腦的剪貼簿。他們藉由特定的錢包網址特徵進行比對、置換,來盜取受害者的加密貨幣資產。

事隔一天,研究人員發現另一起竊資軟體攻擊行動,這回是惡名昭彰的Lumma Stealer(也有人稱為LummaC2),他們發現網釣網域crowdstrike-office365[.]com,假冒該資安業者的名義散布惡意ZIP及RAR壓縮檔,內含MSI安裝檔,一旦執行,電腦就會載入竊資軟體。

他們特別提及這個網域的註冊時間,是在大當機事故發生之後(23日),顯然是針對這起事故而來,再者,攻擊者的身份,研究人員懷疑是6月藉由垃圾郵件轟炸及語音釣魚(vishing)手法,散布Lumma Stealer的駭客所為。

若是使用者不慎下載並執行MSI安裝程式,電腦就會載入RAR自解壓縮檔plenrco.exe,並解開、執行以NSIS封裝打包的安裝程式SymposiumTaiwan.exe,從而在受害電腦部署經過CypherIt打包的竊資軟體。

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