Feeds

Conficker botnet remains dormant - for now

All quiet on the malware front

Internet Security Threat Report 2014

Conficker changed the way parts of the botnet communicated overnight, but little else of note has happened so far.

The malware is far from an April Fool's joke, but it's obviously a long way from the Skynet botnet, as depicted in Terminator 3, that some of the more fevered imaginings of the media hinted at. The main activity that accompanied the run-up to the activation date was the registration of dozens of new domain names designed to advertise rogue security packages in the guise of Conficker clean-up tools.

As widely predicted by security vendors beforehand, Conficker and its 1 April activation was more about hype rather than havoc. As F-Secure notes, worms with triggers have consistently failed to do anything on that date. Previous damp squibs include the Michelangelo virus (1992), CIH (1999), SoBig (2003), and MyDoom (2004).

Nonetheless, Conficker remains implanted on many computers, anywhere between 1-4 million, according to the latest estimates.

Conficker first began spreading in November, using a variety of techniques including the exploitation of a well-known Windows vulnerability. Once it secured a foothold on infected networks the worm is capable of spreading across network shares by exploiting weak password security. The malware is also capable of spreading using infected USB drives.

Early versions of Conficker called home to 250 different domain names every day to see if updates were available. From Wednesday, machines infected by the latest version of Conficker began to poll a sample of 500 out of 50,000 domains a day, making attempts to interfere with the update process more difficult. Most compromised machines are thought to be infected by the earlier B variant, whose behaviour has not changed.

Still earlier versions of the worm include peer-to-peer functionality, so that infected computers can communicate between themselves without the need for a server. This functionality might be used to pass around software updates or initiates malicious activity without the need for update servers. And the new call home routine of the latest variant of the worm is due to take place from now on, so that "sleeper" botnet could be unleashed at any future date.

The botnet is yet to be used for sending spam or running denial of service attacks but even the simple act of spreading has caused major disruption. Confirmed victims include the UK's Ministry of Defence, which reported that that the worm had spread across some of its offices, as well as desktops aboard various Royal Navy warships, the UK's parliament, a Sheffield hospital, the judicial systems in the city of Houston and the Bundeswehr (German Army).

F-Secure informative FAQ on Conficker can be found here, and SRI International's detailed technical analysis is here. A full list of resources, drawn up by the SANS Institute can be found here. ®

Internet Security Threat Report 2014

More from The Register

next story
George Clooney, WikiLeaks' lawyer wife hand out burner phones to wedding guests
Day 4: 'News'-papers STILL rammed with Clooney nuptials
Shellshock: 'Larger scale attack' on its way, warn securo-bods
Not just web servers under threat - though TENS of THOUSANDS have been hit
Apple's new iPhone 6 vulnerable to last year's TouchID fingerprint hack
But unsophisticated thieves need not attempt this trick
PEAK IPV4? Global IPv6 traffic is growing, DDoS dying, says Akamai
First time the cache network has seen drop in use of 32-bit-wide IP addresses
Oracle SHELLSHOCKER - data titan lists unpatchables
Database kingpin lists 32 products that can't be patched (yet) as GNU fixes second vuln
Researchers tell black hats: 'YOU'RE SOOO PREDICTABLE'
Want to register that domain? We're way ahead of you.
Stunned by Shellshock Bash bug? Patch all you can – or be punished
UK data watchdog rolls up its sleeves, polishes truncheon
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.