Kaspersky Lab has detected a new version of the ‘malicious blackmailer’ Gpcode – Virus.Win32.Gpcode.ak.

Kaspersky Lab has detected a new version of the ‘malicious blackmailer’ Gpcode – Virus.Win32.Gpcode.ak.

The new Gpcode variant encrypts files with extensions DOC, TXT, PDF, XLS, JPG, PNG, CPP, H etc. on hard drives using an RSA algorithm with a 1024-bit key.

After encrypting files, the virus leaves a text file in the folder next to the encrypted files with following message:

Your files are encrypted with RSA-1024 algorithm.
To recovery your files you need to buy our decryptor.
To buy decrypting tool contact us at: ********

Currently, we detect the new variant, but we are unable to crack the 1024-bit key. Our analysts are continuing to work on both the key and the virus to resolve this issue.

Kaspersky Lab recommends that all Internet users enable maximum protection from malicious code and network attacks on their computers, refrain from executing suspicious programs received from untrustworthy sources and back up any important information on their computers.

Detection of Virus.Win32.Gpcode.ak was added to Kaspersky Anti-Virus signature databases yesterday, on June 4th, at 15:39 GMT. Please make sure to update if you haven’t already.

If you have fallen victim to Gpcode.ak, try to contact us using another computer connected to the Internet. DO NOT RESTART or POWER DOWN the potentially infected machine. Contact us by email and tell us the exact date and time of infection, as well everything you did on the computer in the 5 minutes before the machine was infected: which programs you have executed, which websites you have visited, etc. We’ll try and help you recover any data that has been encrypted.

For more information about the malicious program, please read our weblog.

More information: Virus.Win32.Gpcode.ak

Story added 9. March 2012, content source with full text you can find at link above.