Feeds

Whistleblower releases Skype snooping code

VoIPwn

Secure remote control for conventional and virtual desktops

The source code for a Windows Trojan capable of recording Skype calls as MP3 files has been released in a move that spells bad news for VoIP confidentiality.

Swiss software developer Ruben Unteregger published the source code for a package capable of eavesdropping on encrypted Skype VoIP conversations on his website Megapanzer.com. Unteregger, who claims he developed the software while working for ERA IT Solutions, reportedly published the code in order shed light on a dark subject and to spur the development of security defences.

An interview on his site touches on Unteregger's rationale for releasing the source code for the Skype Trojan under the GPL.

The source code of this wiretapping trojan will be published in the upcoming days. There won’t be problems about copyright, because ERA IT Solutions let me keep it. The code will be published, it will get analysed as soon as the binaries got uploaded, signature patterns will be created by antivirus companies, the malware will be detected, blocked and deleted, if it tries to infect a system.

Unteregger's blog post announcing the release outlines some of the main features of the malware.

The code is simple and straightforward. You have [to] know malware development is no rocket science and if you expect big magic you are at the wrong place. The backdoor receives instructions from the dropzone and transfers audio files. The Skype-Tap intercepts the Skype function calls, extracts and dumps audio data to files, converts it to the mp3 format and encrypts it.

The code is not 100 per cent complete. I removed the plugin system in the backdor and also the firewall bypassing system is not there anymore. I will publish both of them in separate tools later. If you don’t like this… well, I can’t help you. Thats how it is. Take it or leave it.

Symantec warns that the public availability of the code (dubbed Peskyspy) is likely to spur the development of "customised" threats.

The source code includes backdoor functionality, according to preliminary analysis by anti-virus firm F-Secure.

Unteregger's project finally provides solid foundation to long standing industry rumours.

Leaked documents have previously suggested that Bavarian authorities commissioned a firm called DigiTask to create a similar Trojan. Law enforcement agencies in the US and Europe, most vocally those in Germany, have long complained that Skype has become a barrier to investigations and called for changes in the law that would allow them to plant Trojans on suspects PCs.

The approach involves tricking users into getting infected and hoping the any security defences they have in place don't detect the threat. Not detecting a threat as part of a gentleman's agreement between a software vendor and a law enforcement agency could risk alienating customers and would be difficult, if not impossible to conceal, for any length of time.

That's just one reason why the whole law enforcement Trojan plan has long struck us as both unworkable and plain wrong-headed. The trade craft of a serious criminal or terror suspect would have to be really sloppy to get caught. Simply using a Mac or, better, Linux would defeat any law enforcement Trojan targeted at Windoze users, for example. ®

Security for virtualized datacentres

More from The Register

next story
Brit telcos warn Scots that voting Yes could lead to HEFTY bills
BT and Co: Independence vote likely to mean 'increased costs'
Phones 4u slips into administration after EE cuts ties with Brit mobe retailer
More than 5,500 jobs could be axed if rescue mission fails
New 'Cosmos' browser surfs the net by TXT alone
No data plan? No WiFi? No worries ... except sluggish download speed
Radio hams can encrypt, in emergencies, says Ofcom
Consultation promises new spectrum and hints at relaxed licence conditions
Blockbuster book lays out the first 20 years of the Smartphone Wars
Symbian's David Wood bares all. Not for the faint hearted
'Serious flaws in the Vertigan report' says broadband boffin
Report 'fails reality test' , is 'simply wrong' and offers ''convenient' justification for FTTN says Rod Tucker
This flashlight app requires: Your contacts list, identity, access to your camera...
Who us, dodgy? Vast majority of mobile apps fail privacy test
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.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.
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.
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.