Released on: 2, June 2006
, Author: Doctor Web, Ltd.
, Audience: Software related
Virus monitoring service of Doctor Web, Ltd. informs all userson new modification of Trojan. Encoder detected by Dr.Web Anti-virus asTrojan.Encoder.6. Several variants of this Trojan program are detected at present. Different fromprevious versions, the TrojanÂ's author uses much longer encryption keys of 260 bits,which makes the process of decoding much more difficult. All versions of this Trojan program are distributed via e-mail as spam and acareless user may run the attachment and become a victim of the blackmailer - alldocument files of the invaded computer get encrypted. The user is offered to buy adecryptor; for this he should contact an unknown blackmailer via e-mail. After theTrojan has encrypted files, a readme.txt file of the following content appears ineach folder:
Some files are coded by RSA method.To buy decoder mail: k47674@mail.ruwith subject: REPLY
At present, virus analytics of Doctor Web, Ltd. have managed to find one of the keysused by the felon for crypting the documents of the victimized computer. The curingdecoding utility is soon to be released. The utility can be downloaded from www.drweb.com and should be used as following: 1.Call command line (press "Start" - Run - cmd) 2.Go to the directory with files tobe decrypted 3.Place the decoding utility rsad.exe to the same directory 4. Run thecommand line instruction rsad.exe [name _ of _ decryption _ file] [Enter] If the files were encrypted with the supported key variant, they will be decryptedand the file with the .decrypted extensions will appear. Virus analysts work hard tofind other two keys and soon new hot add-on to Dr.Web virus base will be released. Doctor Web, Ltd. informs all users to be very cautious with mail messages incomingfrom unknown addressees. Meanwhile, the preventive measures are recommended by Doctor Web, Ltd. to keep safefrom viruses  both for those who has an anti-virus program installed and for thosewho do not have any:  Use only a legal anti-virus software  only in this case you will receive hotadd-ons to virus database.  Keep abreast of updates.  Never open attachments arrived in suspicious e-mail messages or from unknowncontacts  Do not work under administrator account if you do not have any anti-virus programinstalled  If you have a suspicion that your computer is infected, and you do not have anyanti-virus installed, check your computer with FREE curing scanner - Dr.Web CureIt!.This utility will not only check the computer, but in most cases will cure removethe infection - not only viruses, but also spyware, adware, hacker tools and paiddialers.
Source: Express-Press-Release.com
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