Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

1/15/2009
03:34 PM
George V. Hulme
George V. Hulme
Commentary
50%
50%

The Downadup Worm Hits 3.5 Million

Security firm F-Secure says that the Downadup worm has spread to more than 3.5 million computers by exploiting a vulnerability Microsoft patched last October.

Security firm F-Secure says that the Downadup worm has spread to more than 3.5 million computers by exploiting a vulnerability Microsoft patched last October.What makes this worm interesting is the ability its creators have put in place to update all of the infected machines each day. While most malware networks may have a few domains each infected machine will use to "call home" and get updates, the Downadup authors have created a system where an algorithm generates many different domains every day. Here's how F-Secure explained it in its blog post:

It uses a complicated algorithm which changes daily and is based on timestamps from public websites such as Google.com and Baidu.com. With this algorithm, the worm generates many possible domain names every day.

Hundreds of names such as: qimkwaify .ws, mphtfrxs .net, gxjofpj .ws, imctaef .cc, and hcweu .org.

This makes it impossible and/or impractical for us good guys to shut them all down - most of them are never registered in the first place.

However, all the creators have to do is register one of the domains that will be generated, and they can update the worm do pretty much do whatever they wish. They could, for example, create a massive botnet to launch denial-of-service attacks from the 3.5 million systems. Or, they could use the worm to seed yet another massive worm infestation on additional PCS.

Of course, much of this this pain could have been avoided if more users had patched the vulnerability in how Windows processes remote procedure call (RPC) requests by the Windows Server service. In fact, in bulletin MS08-067, Microsoft issued a critical out-of-band patch to fix this flaw.

Too bad not enough of us listened.

 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 7/2/2020
Ripple20 Threatens Increasingly Connected Medical Devices
Kelly Sheridan, Staff Editor, Dark Reading,  6/30/2020
DDoS Attacks Jump 542% from Q4 2019 to Q1 2020
Dark Reading Staff 6/30/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
How Cybersecurity Incident Response Programs Work (and Why Some Don't)
This Tech Digest takes a look at the vital role cybersecurity incident response (IR) plays in managing cyber-risk within organizations. Download the Tech Digest today to find out how well-planned IR programs can detect intrusions, contain breaches, and help an organization restore normal operations.
Flash Poll
The Threat from the Internetand What Your Organization Can Do About It
The Threat from the Internetand What Your Organization Can Do About It
This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-9498
PUBLISHED: 2020-07-02
Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static virtual channels. If a userconnects to a malicious or compromised RDP server, a series ofspecially-crafted PDUs could result in memory corruption, possiblyallowing arbitrary code to be executed...
CVE-2020-3282
PUBLISHED: 2020-07-02
A vulnerability in the web-based management interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service, and Cisco Unity Connection could allow an unauthenticated, remote attack...
CVE-2020-5909
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, when users run the command displayed in NGINX Controller user interface (UI) to fetch the agent installer, the server TLS certificate is not verified.
CVE-2020-5910
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the Neural Autonomic Transport System (NATS) messaging services in use by the NGINX Controller do not require any form of authentication, so any successful connection would be authorized.
CVE-2020-5911
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the NGINX Controller installer starts the download of Kubernetes packages from an HTTP URL On Debian/Ubuntu system.