Any file that Chrome users download that passes Google's safe browsing checks will land in the default download directory automatically. Chrome users who want to pick the download folder instead for downloads need to change that behavior in the options.
The new attack, described in detail on the Defense Code website, combines Chrome's automatic download behavior with Windows Explorer Shell Command File files that have the. The aging format is a plain text file that includes instructions, usually an icon location and limited commands.
What's particularly interesting about the format is that it may load resources from a remote server. Even more problematic is the fact that Windows will process these files as soon as you open the directory they are stored in, and that these files appear without extension in Windows Explorer regardless of settings. This means that attackers could easily hide the file behind a disguised filename such as image. The attackers use a SMB server location for the icon. What happens then is that the server requests authentication, and that the system will provide that.
Regarding password cracking feasibility, this improved greatly in the past few years with GPU-based cracking. That's 1. With hundreds of millions leaked passwords resulted from several breaches in the past years LinkedIn, Myspace , wordlist rule-based cracking can produce surprising results against complex passwords with more entropy. The situation is even worse for users on Windows 8 or 10 machines who authenticate with a Microsoft account, as the account will provide the attacker with access to online services such as Outlook, OneDrive, or Office if used by the user.
There is also the chance that the password is reused on non-Microsoft sites. One option that Chrome users have is to disable automatic downloads in the web browser.
This prevents drive by downloads, and may also prevent accidental downloads of files. While you add a layer of protection to Chrome's handling of downloads, manipulated SCF files may land in different ways on target systems. One option that users and administrators have is to block ports used by SMB traffic in the firewall. Microsoft has a guide up that you may use for that. The company suggests to block communication from and to the Internet to the SMB ports , , and Blocking these ports may affect other Windows services however such as the Fax service, print spooler, net logon, or file and print sharing.
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It's seems to be back now, xlsx and zip files download works again, they must have done some silent update. Show 5 more comments. Active Oldest Votes. Seems to be resolved now, via some silent update. Improve this answer. Brian Boyd Brian Boyd 1 1 silver badge 4 4 bronze badges.
Looks like Google just messed up for a few hours. The issue has unfortunately returned. The issue appears to be fixed again! Add a comment. The Overflow Blog. Podcast what if you could invest in your favorite developer? Who owns this outage? Building intelligent escalation chains for modern SRE.
Featured on Meta. Now live: A fully responsive profile. This post provides a step-by-step guide for how to stop Chrome from blocking downloads in If Google Chrome flags some downloads as dangerous, but you are sure they are safe, you can download what you want. To recover any lost or deleted files from storage media, you can turn to MiniTool Power Data Recovery. Google Chrome uses some built-in protective measures to scan the file before downloading, and this can help protect your computer from malicious files that contains virus or malware.
However, if you are sure the downloading file is safe, but Chrome keeps blocking the download, you can learn below how to stop Chrome from blocking downloads in Step 1.
You can open Google Chrome browser on your computer.
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