Attacks/Breaches
1/24/2011
08:15 PM
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
Comments
Newest First  |  Oldest First  |  Threaded View
Ransomware Grabs Headlines but BEC May Be a Bigger Threat
Marc Wilczek, Digital Strategist & CIO Advisor,  10/12/2017
20 Questions to Ask Yourself before Giving a Security Conference Talk
Joshua Goldfarb, Co-founder & Chief Product Officer, IDDRA,  10/16/2017
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: Be a unicorn, not a donkey...
Current Issue
Security Vulnerabilities: The Next Wave
Just when you thought it was safe, researchers have unveiled a new round of IT security flaws. Is your enterprise ready?
Flash Poll
The State of Ransomware
The State of Ransomware
Ransomware has become one of the most prevalent new cybersecurity threats faced by today's enterprises. This new report from Dark Reading includes feedback from IT and IT security professionals about their organization's ransomware experiences, defense plans, and malware challenges. Find out what they had to say!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2017-0290
Published: 2017-05-09
NScript in mpengine in Microsoft Malware Protection Engine with Engine Version before 1.1.13704.0, as used in Windows Defender and other products, allows remote attackers to execute arbitrary code or cause a denial of service (type confusion and application crash) via crafted JavaScript code within ...

CVE-2016-10369
Published: 2017-05-08
unixsocket.c in lxterminal through 0.3.0 insecurely uses /tmp for a socket file, allowing a local user to cause a denial of service (preventing terminal launch), or possibly have other impact (bypassing terminal access control).

CVE-2016-8202
Published: 2017-05-08
A privilege escalation vulnerability in Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) releases earlier than v7.4.1d and v8.0.1b could allow an authenticated attacker to elevate the privileges of user accounts accessing the system via command line interface. With affected version...

CVE-2016-8209
Published: 2017-05-08
Improper checks for unusual or exceptional conditions in Brocade NetIron 05.8.00 and later releases up to and including 06.1.00, when the Management Module is continuously scanned on port 22, may allow attackers to cause a denial of service (crash and reload) of the management module.

CVE-2017-0890
Published: 2017-05-08
Nextcloud Server before 11.0.3 is vulnerable to an inadequate escaping leading to a XSS vulnerability in the search module. To be exploitable a user has to write or paste malicious content into the search dialogue.