Cloud

2/7/2018
10:30 AM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
100%
0%

New Zero-Day Ransomware Evades Microsoft, Google Cloud Malware Detection

Shurl0ckr, a form of Gojdue ransomware, was not detected on SharePoint or Google Drive.

Google Drive and Microsoft Office 365, both of which have built-in malware protection, failed to identify a new form of Gojdue ransomware dubbed Shurl0ckr. The zero-day ransomware evaded most major antivirus platforms: only seven percent of 67 tested tools detected it.

Researchers on the Bitglass Threat Research Team discovered Shurl0ckr during a scan of malware in the cloud. It was confirmed as a form of ransomware-as-a-service by Cylance.

Shurl0ckr works the same way as Satan ransomware. A hacker creates a ransomware payload and distributes it via phishing or drive-by download. The malware encrypts files on disk in the background until the victim pays a Bitcoin ransom. Hackers pay a percentage to the author.

The discovery was part of a broader study on malware in the cloud. Researchers found 44% of businesses they scanned had some form of malware in at least one of their cloud applications. One in three corporate instances of SaaS applications were infected with malware.

Microsoft OneDrive had the highest rate of infection compared with other major SaaS applications, with 55% of instances hit. Google Drive was next-highest at 43%, followed by Box and Dropbox, both of which had a 33% infection rate.

Researchers dug into which file types are most likely to have malware. Script and executable formats were most common at 42%, followed by Office documents (21%), other file formats like text files and images (19%), Windows system files (10%), and compressed formats (8%).

The average business has nearly 450,000 files in the cloud, they report, and 1 in 20,000 contains malware, they report in their findings.

Kelly Sheridan is the Staff Editor at Dark Reading, where she focuses on cybersecurity news and analysis. She is a business technology journalist who previously reported for InformationWeek, where she covered Microsoft, and Insurance & Technology, where she covered financial ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
WebAuthn, FIDO2 Infuse Browsers, Platforms with Strong Authentication
John Fontana, Standards & Identity Analyst, Yubico,  9/19/2018
Turn the NIST Cybersecurity Framework into Reality: 5 Steps
Mukul Kumar & Anupam Sahai, CISO & VP of Cyber Practice and VP Product Management, Cavirin Systems,  9/20/2018
NSS Labs Files Antitrust Suit Against Symantec, CrowdStrike, ESET, AMTSO
Kelly Jackson Higgins, Executive Editor at Dark Reading,  9/19/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: White Privelege Day
Current Issue
Flash Poll
The Risk Management Struggle
The Risk Management Struggle
The majority of organizations are struggling to implement a risk-based approach to security even though risk reduction has become the primary metric for measuring the effectiveness of enterprise security strategies. Read the report and get more details today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-17282
PUBLISHED: 2018-09-20
An issue was discovered in Exiv2 v0.26. The function Exiv2::DataValue::copy in value.cpp has a NULL pointer dereference.
CVE-2018-14592
PUBLISHED: 2018-09-20
The CWJoomla CW Article Attachments PRO extension before 2.0.7 and CW Article Attachments FREE extension before 1.0.6 for Joomla! allow SQL Injection within download.php.
CVE-2018-15832
PUBLISHED: 2018-09-20
upc.exe in Ubisoft Uplay Desktop Client versions 63.0.5699.0 allows remote attackers to execute arbitrary code. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of URI ha...
CVE-2018-16282
PUBLISHED: 2018-09-20
A command injection vulnerability in the web server functionality of Moxa EDR-810 V4.2 build 18041013 allows remote attackers to execute arbitrary OS commands with root privilege via the caname parameter to the /xml/net_WebCADELETEGetValue URI.
CVE-2018-16752
PUBLISHED: 2018-09-20
LINK-NET LW-N605R devices with firmware 12.20.2.1486 allow Remote Code Execution via shell metacharacters in the HOST field of the ping feature at adm/systools.asp. Authentication is needed but the default password of admin for the admin account may be used in some cases.