Denial of Service (Dos) and Distributed Denial of Service (DDoS) attacks are unforgiving. They test the limits of your web server and application resources by sending spikes of fake traffic to your website. It is also notoriously difficult to conduct forensics on a DDoS attack, making the source of the attack a mystery. DDoS attacks […]
Tag Archives: iFrames
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 […]
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, […]
Malicious Cryptominers from GitHub
Recently, a webmaster contacted us when his AVG antivirus reported that the JS:Miner-C [Trj] infection was found on their site. Our investigation revealed a hidden iframe had been injected into the theme’s footer.php file: <iframe src="hxxps://wpupdates.github[.]io/ping/” style=”width:0;heigh:0;border:none;”> When we opened the URL in a browser, the page was blank. After checking the HTML source code, […]
Affiliate Cookie Stuffing in iFrames
Inline frames (iFrames) are an easy way to embed content from another site onto your own. This element allows you to insert another document inside an HTML page and can be really useful for embedding interactive applications like Google maps, advertisements and ecommerce applications. iFrame elements are also popular with website attackers because it allows […]
Injection of Unwanted Google AdSense Ads
During the last couple of years, it has become quite prevalent for hackers to monetize compromised sites by injecting unwanted ads. They can be pop-up ads triggered when a visitor spends a certain amount of time on an infected page, or automatic redirection of mobile traffic to URLs that belong to ad networks. It’s not […]
Malicious iFrame Injector Found in Adobe Flash File (.SWF)
Finding malware in Adobe Flash files (.swf) is nothing new, but it usually affects personal computers, not servers. Typically, a hidden iFrame is used to drop a binary browser exploit with .SWF files, infecting the client machine. This time we saw the opposite, where a binary .SWF file injects an invisible iFrame. This is an […]
New iFrame Injections Leverage PNG Image Metadata
We’re always trying to stay ahead of the latest trends, and today we caught a very interesting one that we have either been missing, or it’s new. We’ll just say it’s new.. We’re all familiar with the idea of iFrame Injections, right? Understanding an iFrame Injection The iFrame HTML tag is very standard today, it’s […]
