or free scanners lately? Still looking, but ...
In March 2009, we notified our customers on a new variant of the infamous Vundo trojan family which we detected as Ransom-F and raised its risk assessment to a Low-Profiled threat. It was possibly the first indicators of a shift in the FakeAlert criminal model from instilling fear, to holding information technology resources for ransom but certainly not the last.
Last week, we came across to a new variant of a rogue security program branded by its creators as “System Security 2009″ and detected them as FakeAlert-CO, and some of its past similarly branded cousins as FakeAlert-SystemSecurity.
The updated variants were discovered from a web page hosted on trustedw{blocked}security.com.As most other rogue security programs to date, FakeAlert-CO displays spurious alerts and making fraudulent claims of infections that requires the user to pay a fee to “repair”. Following the trend of Ransom-F, we noticed “new features” in FakeAlert-COthat resembles some common characteristics of ransomware trojans.
Once installed, FakeAlert-CO may either terminates all running user process or prompts the user to reboot. (...)
http://www.avertlabs.com/research/blog/index.php/2009/05/12/fakealert-trojan-holds-systems-for-ransom/