Black Hat Tactics

Ask Sucuri: How Do You Find Website Backdoors?

In a previous post, we have explained what website backdoors are and what they look like. Today, we want to focus on ways that we identify and remove backdoors to prevent reinfection. Techniques to Find Backdoors Finding a website backdoor is not an easy task because the main function of a backdoor is to keep

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CoinImp Cryptominer and Fully Qualified Domain Names

We are all familiar with the conventional domain name notation, where different levels are concatenated with the full stop character (period). E.g. “www.example.com”, where “www” is a subdomain, “example” is a second level domain, and “com” is a top level domain. However, very few know that there is also a DNS root domain and it

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What are Website Backdoors?

When a site gets compromised, the attackers will often leave some piece of malware behind to allow them access back to the site. Hackers want to leave a door open to retain control of the website and to reinfect it continuously. This type of malware is called a backdoor. What Are Backdoors? Backdoors are types

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Magento Credit Card Stealer Reinfector

In the past few months, we have frequently seen how attackers are infecting Magento installations to scrape confidential information such as credit cards, logins, and PayPal credentials. That is why we have reported on a credit card stealer reinfector of Magento websites in one of our recent Labs Notes. In this post, we describe one of

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Shell Logins as a Magento Reinfection Vector

Recently, we have come across a number of websites that were facing reinfection of a credit card information stealer malware within the following files: app/Mage.php; lib/Varien/Autoload.php; index.php; app/code/core/Mage/Core/functions.php; These are common files for attackers to target as they operate throughout Magento sites, but these instances were special as they had a very peculiar reinfection rate.

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An Old Trick with a New Twist: Cryptomining Through Disguised URL Shorteners

As we have previously discussed on this blog, surreptitious cryptomining continues to be a problem as new methods emerge to both evade and hasten the ease of mining at the expense of system administrators, website owners, and their visitors. Another Way Hackers are Tricking Website Visitors into Stealth Cryptomining The latest of these new techniques

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Analysis of a Malicious Blackhat SEO Script

An enormous number of SEO spam infections are handled by us here at Sucuri. In our most recent hacked website trend report, we analyzed over 34,000+ websites and identified that 44% of all website infection cases were misused for SEO spam campaigns. Once a website has been compromised, attackers often use it to distribute malware,

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From Baidu to Google’s Open Redirects

Last week, we described how an ongoing massive malware campaign began using Baidu search result links to redirect people to various ad and scam pages. It didn’t last long. Soon after the publication of that article, the bad actors changed the links to use compromised third-party sites and a couple of day later they began

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Malicious Activities with Google Tag Manager

If I were to ask if you could trust a script from Google that is loading on your website, the majority of users would say “yes” or even “absolutely”. But when malicious behavior ensues, everything should be double-checked and suspected, even assets that come from “trusted sources” like Google, Facebook, and Youtube. In the past,

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Hacked Website Trend Report – 2017

We are proud to be releasing our latest Hacked Website Trend Report for 2017. This report is based on data collected and analyzed by the Sucuri Remediation Group (RG), which includes the Incident Response Team (IRT) and the Malware Research Team (MRT). The data presented stems from the analysis of 34,371 infected websites summarizing the

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