Attacks/Breaches
1/24/2011
08:15 PM
Connect Directly
RSS
E-Mail
50%
50%

Twitter Worm Unleashes Fake AV Attack

Google's goo.gl link shortening service, as well as code obfuscation with RSA public key cryptography algorithm are spreading malicious links via a bogus antivirus campaign.

A Twitter worm is behind a new, fake antivirus campaign now in the wild.

According to Kaspersky Lab security researcher Nicolas Brulez, the new worm "is spreading fast, using the 'goo.gl' URL shortening service to distribute malicious links."

The attack, which was first spotted on Thursday, tweets a single, malicious link, with no additional message text, though all of the attacks list Mobile Web -- Twitter's app for generic mobile phones -- as the client used to post the tweet. Clicking on the malicious link sends users to one of various domains which feature an HTML page named "m28sx.html," which then redirects users to a static Web page with a Ukrainian top-level domain address. From here, users are redirected to pages which hawk fake AV, aka scareware.

Like all fake AV, "the user is invited to remove all the threats from their computer, and will download a fake antivirus application called Security Shield," said Brulez. Interestingly, the graphical user interface of the rogue AV software shows up in the operating system's default language.

Twitter is aware of the attack and is working to block it. On Thursday, Del Harvey, head of Twitter's Trust & Safety group, tweeted: "Did you follow a goo.gl link that led to a page telling you to install 'Security Shield' Rogue AV? That's malware. Don't install." She added in a second tweet: "We're working to remove the malware links and reset passwords on compromised accounts."

Security Shield appears to be an update of a previous strain of fake AV known as Security Tool, since "the Web page is using exactly the same obfuscation techniques …, which is an implementation of RSA cryptography in JavaScript to obfuscate the page code," said Brulez.

Attackers seem to favor RSA over other obfuscation techniques, he said, likely because key length can be kept relatively short, and also because private keys can be called via JavaScript.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Flash Poll
Current Issue
Cartoon
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2012-6651
Published: 2014-07-31
Multiple directory traversal vulnerabilities in the Vitamin plugin before 1.1.0 for WordPress allow remote attackers to access arbitrary files via a .. (dot dot) in the path parameter to (1) add_headers.php or (2) minify.php.

CVE-2014-2970
Published: 2014-07-31
** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2014-5139. Reason: This candidate is a duplicate of CVE-2014-5139, and has also been used to refer to an unrelated topic that is currently outside the scope of CVE. This unrelated topic is a LibreSSL code change adding functionality ...

CVE-2014-3488
Published: 2014-07-31
The SslHandler in Netty before 3.9.2 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a crafted SSLv2Hello message.

CVE-2014-3554
Published: 2014-07-31
Buffer overflow in the ndp_msg_opt_dnssl_domain function in libndp allows remote routers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted DNS Search List (DNSSL) in an IPv6 router advertisement.

CVE-2014-5171
Published: 2014-07-31
SAP HANA Extend Application Services (XS) does not encrypt transmissions for applications that enable form based authentication using SSL, which allows remote attackers to obtain credentials and other sensitive information by sniffing the network.

Best of the Web
Dark Reading Radio