我会尽量保持故事，所以你可以更清楚地了解我的担忧。虽然，我使用Chrome浏览器应用程序在手机上浏览互联网，我收到了我下载文件的通知。通知显示正在下载的文件是一个mp3。
在我甚至有时间做出反应和停止下载过程之前，文件已经在我的手机上。我立即使用手机上的文件管理器从下载文件夹中删除它。但是，我注意到文件格式丢失了。文件名没有任何结束，例如.pdf，.mp3，.apk等。
之后，我用几个反病毒软件应用程序扫描了我的手机，所有的手机都返回了我的手机是安全的。但是，我真的不确定我是否能够完全信任他们。
我决定将手机放在隔离区，直到我有更多关于这个问题的信息。我关掉了我的Wi-Fi并从中删除了SIM卡，以防是一种防止它将数据或消息发送到未知方向的实际病毒。
我有以下问题：
ps：我会非常感谢每个人，他们与我分享他们的想法。提前谢谢。
I will try to keep the story as short as possible just so you can have a more clear view of what is my concern. While, I was browsing the Internet on my phone using the Chrome Browser App, I got a notification that I am downloading a file. The notification showed that the file which was being downloaded is an MP3.
Short after that before I even had the time to react and stop the downloading process the file was already on my phone. I immediately deleted it from the Download folder using the File Manager on my phone. However, I noticed that the file format was missing. The file name didn't have any ending such as .pdf, .mp3, .apk, etc.
After that I scanned my phone with several anti-virus software apps and all returned that my phone is safe. However, I am not really sure if I can fully trust them.
I decided to put my phone on quarantine until I got more information regarding this problem. I turned off my Wi-Fi and removed the SIM card from it just in case if it is an actual virus to prevent it sending data or messages to an unknown direction.
I have the following questions:
PS: I will be very grateful to everyone, who share their thoughts about this with me. Thank you in advance.
文件扩展倾向于仅作为用户快速识别文件的助记符，以及用于在加载和打开它们之前过滤渗出不兼容的文件的软件。后者解释了为什么您的操作系统未识别文件类型。
要执行文件是常见的lingo，即使是不成的：执行程序，然后是尝试解析文件。如果此程序无法解析文件，则会报告错误或崩溃。这意味着你可能是安全的。第二，Android采用了一项安全机制，以限制可能是恶意软件的执行。例如，恶意软件往往以二进制文件的形式出现。在现代Android版本中，此类文件（以及明文脚本）无法从内部或外部存储（如果有）。这意味着，可能伤害您设备的唯一文件是已安装的APK文件 - 即 Apps 。
即使那么，应用程序也被许多方式限制，因为它们中的每一个在孤立的上下文中运行，能够仅通过预定义手段与他人通信。因此，一些代码可以对您的设备造成伤害的唯一方法，如果操作系统本身会呈现可以利用的错误，并且此类问题源于尚未更新的OSE暂停。实际上，即使是其他应用程序也可以利用，但对于攻击者利用这种弱点，他们需要先前了解您所安装的软件（甚至那么，他们只能获得易受攻击的应用程序本身可以访问的东西。如果我是你，而不是担心被感染了，我会担心我的浏览器下载文件，没有我的表达授权。您不需要进行工厂重置，但如果在其行为中继续替换浏览器。
File extensions tend to be present only as mnemonics for the user to quickly identify a file, and for software to filter out incompatible files prior to loading and opening them. The latter explains why your OS did not recognize the file type.
To execute a file is common lingo, even if inexact: you execute a program, which then tries to parse the file. Should this program fail to parse the file, it will either report the error or crash. This means that you're probably safe.
Second, Android employs a deal of security mechanisms in order to limit the execution of possibly malicious software. For example, malware tend to come in the form of binary files. On modern Android versions, such files (as well as plaintext scripts) cannot be launched from neither the internal or the external storage (if any). This means, that the only kind of file that could harm your device are APK files that have been installed xe2x80x93 namely, apps.
Even then, apps are restricted in many a way, as each of them run in an isolated context, being able to communicate with others only via predefined means. Therefore, the only way some code could do harm to your device, is if the operating system itself presents bugs that can be exploited, and such issues stem from OSes that haven't been updated in a while. Indeed, even other apps could be exploitable, but for an attacker to make use of such a weakness, they would need prior knowledge of your installed software (and even then, they could only gain access to what the vulnerable app itself can access).
If I were you, rather than worrying about having been infected, I would be concerned about my browser downloading files without my expressed authorization. You needn't do a factory reset, but you may want to replace your browser if it continues in its behavior.
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