Feeds

Ransomware Trojan locks up infected PCs

UK regulator probes pay-by-phone extortion

Top 5 reasons to deploy VMware with Tegile

A new strain of "Ransomware" that attempts to coerce victims into paying $35 to unlock their Windows PC, is doing the rounds.

The scam uses a variety of premium rate numbers in different countries, and UK regulator PhonePayPlus is investigating the suspected misuse of a type of premium rate line normally used for sex lines in the UK.

The Delf-CTK Trojan poses as a "Browser Security and Anti-adware" security application whose license has expired. Windows machines infected by the malware are confronted by a full-screen message that poses as a Windows error. Ironically, but unsurprisingly, the malware typically uses Windows exploits to infect vulnerable machines.

Prospective marks are invited to call a country-specific premium rate number and enter a PIN to obtain a license code. The US premium rate number belongs to "passwordtwoenter.com", a payment processing firm used by hardcore porn sites, according to anti-spyware firm Sunbelt Software, which was the first to warn of the ruse. Passwordtwoenter.com is registered to Global Voice SA, a firm based in the Indian Ocean island state of the Seychelles.

If the US number doesn't work, prospective marks are invited to call alternate numbers including a satellite telephone number and another in the West African nation of Cameroon, Computerworld adds. UK and French premium numbers also feature in the scam.

The 0909 number British marks are invited to call is reserved for adult premium rate lines, premium rate regulator PhonePayPlus told El Reg. PhonePayPlus agreed to investigate the issue, after we told them about the scam. A spokesman added that he wasn't aware of previous UK cases where malware has been linked to attempts to prompt users into phoning premium rate lines.

Ransomware packages (which began appearing early in 2006) typically use malicious code to gain control of user files, encrypt them, and threaten users that they won't see these files again unless they hand over a cash "ransom" to hackers.

The Delf-ctk Trojan is more subtle than this, the demands are less transparently hostile, and a different (more advanced) payment method is used. Users infected by the malware are locked out of their whole system by malware that takes over their desktop - not just preventing them from opening particular files - so in some ways the Delf-CTK Trojan is nastier than earlier ransomware strains such as Gpcode. ®

Internet Security Threat Report 2014

More from The Register

next story
'Kim Kardashian snaps naked selfies with a BLACKBERRY'. *Twitterati gasps*
More alleged private, nude celeb pics appear online
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
UK.gov lobs another fistful of change at SME infosec nightmares
Senior Lib Dem in 'trying to be relevant' shocker. It's only taxpayers' money, after all
Spies would need SUPER POWERS to tap undersea cables
Why mess with armoured 10kV cables when land-based, and legal, snoop tools are easier?
TOR users become FBI's No.1 hacking target after legal power grab
Be afeared, me hearties, these scoundrels be spying our signals
Snowden, Dotcom, throw bombs into NZ election campaign
Claim of tapped undersea cable refuted by Kiwi PM as Kim claims extradition plot
Freenode IRC users told to change passwords after securo-breach
Miscreants probably got in, you guys know the drill by now
THREE QUARTERS of Android mobes open to web page spy bug
Metasploit module gobbles KitKat SOP slop
BitTorrent's peer-to-peer chat app Bleep goes live as public alpha
A good day for privacy as invisble.im also reveals its approach to untraceable chats
prev story

Whitepapers

Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.