Virus Information

The mass-mailer is approximately 12888 bytes in length, comes as attachment in zip form with "store" method and password protected or (with a 50% chance) as an attachment with .pif or .exe extension. It is packed with UPX. It arrives in an email in the following format: From: [forged email address, starts with one of the following:] management@ administration@ staff@ noreply@ support@ Subject: [one of the following] E-mail account security warning. Notify about using the e-mail account. Warning about your e-mail account. Important notify about your e-mail account. Email account utilization warning. Notify about your e-mail account utilization. E-mail account disabling warning. Body: Part1: [one of the following] Dear user of %s, Dear user of %s gateway e-mail server, Dear user of e-mail server "%s", Hello user of %s e-mail server, Dear user of "%s" mailing system, Dear user, the management of %s mailing system wants to let you know that, Part2: [one of the following] Your e-mail account has been temporary disabled because of unauthorized access. Our main mailing server will be temporary unavaible for next two days, to continue receiving mail in these days you have to configure our free auto-forwarding service. Your e-mail account will be disabled because of improper using in next three days, if you are still wishing to use it, please, resign your account information. We warn you about some attacks on your e-mail account. Your computer may contain viruses, in order to keep your computer and e-mail account safe, please, follow the instructions. Our antivirus software has detected a large ammount of viruses outgoing from your email account, you may use our free anti-virus tool to clean up your computer software. Some of our clients complained about the spam (negative e-mail content) outgoing from your e-mail account. Probably, you have been infected by a proxy-relay trojan server. In order to keep your computer safe, follow the instructions. Part3: [one of the following] For more information see the attached file. Further details can be obtained from attached file. Advanced details can be found in attached file. For details see the attach. For details see the attached file. For further details see the attach. Please, read the attach for further details. Pay attention on attached file. Part4: [one of the following] The %name% team http://www.%name% The Management, Sincerely, Best wishes, Have a good day, Cheers, Kind regards, Please note that %name% will be replaced with the recepient\s mail server name. Example: if the message will be send to someone@yahoo.com, then the message will end with something like this: The Yahoo.com team. Part5: [optional, if the attachement will be in zip form, one of the following] For security reasons attached file is password protected. The password is "%pass%". For security purposes the attached file is password protected. Password is "%pass%". Attached file protected with the password for security reasons. Password is %pass%. In order to read the attach you have to use the following password: %pass%. Please note that %pass% is variable, 5 characters in length and numeric only. Attachment: [one of the following].[zip, exe or pif] Attach Information Readme Document Info TextDocument TextFile MoreInfo Message Upon execution, it drops only two files in the Windows\\System directory (as opposed to the previous variants): - irun4.exe is the virus in UPX form. - irun4.exeopen, may be the archived and password protected version of the virus or a copy of iru4.exe. The virus will not inject itself in the "explorer.exe" process anymore in this strain. The worm checks the date and if the date is after 25 April 2005 the worm will exit, deleting all registry entries and killing itself from memory.

For disinfection, download and run our free eScan Anti-Virus Toolkit. The utility checks your computer, system registry, and running processes for malicious programs, illegal dialers, and sniffer tools. Note: This tool does not protect your PC in real time.

You can download the eScan Anti-Virus Toolkit utility from the MicroWorld Web site.

Alternatively, you can install MicroWorld’s Internet Security Suite which has real time detection capabilities.
You can download and install the product from our eScan download page.