Q: サイトをクリーンアップしましたが、ハッカーによって悪いサイトへリンクされていた場合、検索順位に影響はあるのでしょうか？
A: Google でもそのような事態は望んでいません。ハッカーやスパマーの行為によって、良いサイトの検索順位などに影響が出ないように務めています。念のために、ハッカーが追加した可能性のあるリンクは完全に削除してください。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2011-09-01 UTC。"],[[["\u003cp\u003eWebsites can be hacked despite preventative measures, resulting in malware infection and potential badware issues.\u003c/p\u003e\n"],["\u003cp\u003eWebmasters should contact their hosting provider for support and consider taking the site offline or returning a 503 status code.\u003c/p\u003e\n"],["\u003cp\u003eA complete OS reinstall from a trusted source is the best way to ensure complete malware removal, followed by restoring from a clean backup.\u003c/p\u003e\n"],["\u003cp\u003eWebmasters should change all passwords, patch software, and request a review in Google Webmaster Tools if the site was flagged for malware.\u003c/p\u003e\n"],["\u003cp\u003eGoogle tries to avoid penalizing sites for hacker-introduced backlinks, but webmasters should remove any suspicious links to be safe.\u003c/p\u003e\n"]]],["If hacked, immediately contact your hosting provider. Take the site offline or use a `503` status code, and remove hacked URLs via Webmaster Tools. Assess the damage by checking for modified files and suspicious server activity. Recover by reinstalling the OS, restoring from a clean backup, and updating all software. Restore your online presence and request a review in Webmaster Tools. Reinstalling the OS and using updated software are ideal to fully remove any potential harm.\n"],null,["# My site's been hacked - now what?\n\nMonday, April 07, 2008\n\n\nAll right, you got hacked. It happens to many webmasters, even despite the hard work you devote\nto prevent this type of thing from happening. Prevention tips include keeping your site updated\nwith the latest software and patches, creating an account with\n[Google Webmaster Tools](https://search.google.com/search-console)\nto see what's being indexed, keeping tabs on your log files to make sure nothing fishy's going\non, etc. (There's more information in the\n[Quick Security Checklist](/search/blog/2007/09/quick-security-checklist-for-webmasters)\nwe posted last year.)\n\n\nRemember that you're not alone---hacked sites are becoming increasingly common. Getting hacked\ncan result in your site being infected with badware (more specifically malware, one type of\nbadware). Take a look at\n[StopBadware's](https://www.stopbadware.org/) recently released report on\n[Trends in Badware 2007](https://www.stopbadware.org/pdfs/trends_in_badware_2007.pdf)\nfor a comprehensive analysis of threats and trends over the previous year. Check out\n[this light technical report](https://googleonlinesecurity.blogspot.com/2008/02/all-your-iframe-are-point-to-us.html)\non the\n[Google Online Security Blog](https://googleonlinesecurity.blogspot.com/)\nwhich highlights the increasing number of search results containing a URL labeled as harmful. For\neven more in-depth technical reports on the analysis of web-based malware, see\n[The Ghost in the Browser](https://www.usenix.org/events/hotbots07/tech/full_papers/provos/provos.pdf)\n(pdf) and this\n[technical report](https://research.google.com/archive/provos-2008a.pdf)\n(pdf) on drive-by downloads. Read these, and you'll have a much better understanding of the scope\nof the problem. They also include some real examples for different types of malware.\n\n\nThe first step in any case should be to contact your hosting provider, if you have one. Often\ntimes they can handle most of the technical heavy lifting for you. Lots of webmasters use shared\nhosting, which can make it difficult to do some of the things listed below. Certain tips labeled\nwith an asterisk (\\*) are cases in which webmasters using shared hosting will most likely require\nassistance from their hosting provider. In the case that you do have full control over your\nserver, we recommend covering these four bases:\n\nGetting your site off-line\n--------------------------\n\n- Take your site off-line temporarily, at least until you know you've fixed things.\n- If you can't take it off-line, return a [`503` status code](/search/docs/crawling-indexing/http-network-errors) to prevent it from being crawled.\n- In the Webmaster Tools, use the [URL removal tool](https://www.google.com/support/webmasters/bin/answer.py?answer=61062&topic=8459) to remove any hacked pages or URLs from search results that may have been added. This will prevent the hacked pages from being served to users.\n\nDamage Assessment\n-----------------\n\n- It's a good idea to figure out exactly what the hacker was after.\n - Were they looking for sensitive information?\n - Did they want to gain control of your site for other purposes?\n- Look for any modified or uploaded files on your web server.\n- Check your server logs for any suspicious activity, such as failed login attempts, command history (especially as root), unknown user accounts, etc.\n- Determine the scope of the problem---do you have other sites that may be affected?\n\nRecovery\n--------\n\n- The absolute best thing to do here is a complete reinstall of the OS from a trusted source. It's the only way to be completely sure you've removed everything the hacker may have done.\\*\n- After a fresh re-installation, use the latest backup you have to restore your site. Don't forget to make sure the backup is clean and doesn't have any hacked content.\\*\n- Patch any software packages to the latest version. This includes things such as weblog platforms, content management systems, or any other type of third-party software installed.\n- Change your passwords--- [see our help center for tips about creating a strong password](https://www.google.com/accounts/PasswordHelp)\n\nRestoring your online presence\n------------------------------\n\n- Get your system back online.\n- If you're a Webmaster Tools user, sign in to your account\n - If your site was flagged as having malware, request a review to determine whether your site is clean\n - If you used the URL removal tool on URLs which you do want in the index, request that Webmaster Tools re-include your content by revoking the removal.\n- Keep an eye on things, as the hacker may try to return.\n\nAnswers to other questions you may be asking:\n\n\n**Is it better to take my site off-line or use robots.txt to prevent it from being crawled?**\nTaking it off-line is a better way to go; this prevents any malware or badware from being served\nto users, and prevents hackers from further abusing the system.\n\n\n**Once I've fixed my site, what's the fastest way to get re-crawled?** The best way, regardless\nof whether or not your site got hacked, is to follow the\n[Webmaster Help Center guidelines](/search/docs/fundamentals/get-on-google).\n\n\n**I've cleaned it up, but will Google penalize me if the hacker linked to any bad\nneighborhoods?** We'll try not to. We're pretty good at making sure good sites don't get\npenalized by actions of hackers and spammers. To be safe, completely remove any links the hackers\nmay have added.\n\n\n**What if this happened on my home machine?** All of the above still applies. You'll want to\ntake extra care to clean it up; if you don't, it's likely the same thing will happen again. A\ncomplete re-install of the OS is ideal.\n\nAdditional resources you may find helpful:\n\n- If your site's been flagged by Google as serving malware, we'll [alert you](/search/blog/2006/11/badware-alerts-for-your-sites) when you visit [Webmaster Tools](https://search.google.com/search-console).\n- Don't forget about the [Google Webmaster Help Group](https://support.google.com/webmasters/community); it's full of extremely knowledgeable users, and Googlers as well. For a nice, on-topic example, check out [this thread](https://groups.google.com/group/Google_Webmaster_Help-Indexing/browse_thread/thread/98cd67810dc69942/72809bf28e8e039a). There's also a [Stop Badware group](https://groups.google.com/group/stopbadware).\n- Matt Cutts recently posted [Three tips to protect your WordPress installation](https://www.mattcutts.com/blog/three-tips-to-protect-your-wordpress-installation/) on his blog, and there are lots of great comments below the post as well.\n\nWritten by Nathan Johns, Search Quality Team"]]
