Feeds

Netsky B is very pesky

Mutating worm

  • alert
  • submit to reddit

Protecting users from Firesheep and other Sidejacking attacks with SSL

A new, more dangerous version of the Netsky worm is making the rounds on the Internet.

The bug, which goes by the name Netsky-b or Moodown-b, is a modified version of NetSky-a that surfaced earlier this week. Initial ratings from the likes of Symantec, Network Associates and F-Secure suggest that the malware is a medium- to high-grade threat; and early reports say that the worm is spreading quickly.

Though not nearly as virulent or destructive as the recent MyDoom bug, Netsky-b has infected hundreds of systems, including computers within some major corporations such as Lucent, according to reports.

Netsky-b is a self-propagating -mail worm, which is delivered in executable attachments in incoming e-mails. Once the infected attachment is opened, the bug copies itself to the computer and re-sends itself to all email addresses found on the hard drive of the contaminated PC.

Some interesting and nefarious aspects of the worm include innocuous-looking file extensions on some infected files, such as .doc, .txt or .rtf. These phoney extensions, which may be designed to fool users and anti-virus software, appear before actual file type extensions such as .pif, .scr, .exe or sometimes .zip.

Emails containing the bug are also delivered with subject lines such as "hi," "information" and "stolen,". Email body messages are simple and include lines such as: "here is the document." Netsky-b also spoofs email addresses so that incoming messages may appear to come from someone with whom the potential victim is familia.

The worm affects only versions of Windows later than Windows 95 and it has the capacity to spread via file-sharing networks like Kazaa, Bearshare and Limewire. Once installed, the malicious software launches a fake error message which reads: "The file could not be opened!"

The worm also attempts to make some registry-key changes, including changes that are capable of deactivating the Mydoom.a and Mydoom.b bugs, if they exist on the victim's computer.

Anti-virus vendors and e-security experts are, as always, urging users not to open suspicious e-mails and recommending that users upgrade their anti-virus software as soon as possible.

© ENN

The next step in data security

More from The Register

next story
Israeli spies rebel over mass-snooping on innocent Palestinians
'Disciplinary treatment will be sharp and clear' vow spy-chiefs
Infosec geniuses hack a Canon PRINTER and install DOOM
Internet of Stuff securo-cockups strike yet again
THREE QUARTERS of Android mobes open to web page spy bug
Metasploit module gobbles KitKat SOP slop
'Speargun' program is fantasy, says cable operator
We just might notice if you cut our cables
Apple Pay is a tidy payday for Apple with 0.15% cut, sources say
Cupertino slurps 15 cents from every $100 purchase
YouTube, Amazon and Yahoo! caught in malvertising mess
Cisco says 'Kyle and Stan' attack is spreading through compromised ad networks
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
Greater dev access to iOS 8 will put us AT RISK from HACKERS
Knocking holes in Apple's walled garden could backfire, says securo-chap
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.