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Process Name  : irun4.exe

Process Path : %SYSTEM%\irun4.exe [ C:\Windows\System32\irun4.exe]

Process type    : Internet Worm

Malware Name : W32.Bagle.J@mm

Alias             : I-Worm/Bagle.J, W32/Bagle.J@MM , Bagle.J, W32/Bagle-J,  WORM_BAGLE.J 

Threat level : Low

Process Details :

                     Irun4.exe is the main component dropped by Bagle.J. It is a mass mailing worm, uses  e-mail addresses collected from .wab .txt .htm .html .dbx .mdx .eml .nch .mmf .ods .cfg .asp .php .pl .adb  and .sht files to distribute infected messages. Bagle worm arrives as an e-mail attachment. The infected attachment will be a password protected ZIP file or an executable file with PIF extension. This variant will not spread after 25th April 2004.

The infected mail subject will be 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. 

The infected mail message body will contain one of the following

"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."

                     When the worm file is executed, it copies itself to Windows system folder as "irun4.exe" in the background. W32.Beagle.J@mm modifies registry run section to load automatically on the next startup. The registry modification is given below.

"srate.exe"= %SYSTEM%\irun4.exe

[ By default, %SYSTEM% will be C:\Windows\System in case of Windows 95/98/ME, C:\Winnt\System32 in case of Windows NT/2000 and C:\Windows\System32 in case of Windows XP ]

                    Bagle.J worm uses its own SMTP engine to send infected messages. The worm tries to terminate security programs in the infected system. Bagle.J worm will not send infected mails to the following e-mail addresses


                    Bagle.J contains backdoor abilities and it opens TCP port 2745. It allows hackers to upload files in the infected computer. Bagle.J tries to download a PHP script ( scr.php ) from the following sites

How can I protect my system?

                   Solo has incorporated irun4.exe in its signature file to protect users from this worm attack. Solo antivirus registered users are already protected from this Worm. Make sure that you have installed registered version of Solo Antivirus to protect your system from all virus threats.

How to remove this Worm?

                   If you are already infected with irun4.exe process, you can remove it from your computer using Solo Antivirus software. Use the following link to Download 30 day trial version of Solo antivirus to remove viruses from your computer.

                   Solo anti-virus not only scans for all viruses, it contains a unique System Integrity Checker to protect you from New Internet Worms, Backdoors and malicious VB, Java Scripts. It also effectively removes all existing Internet Worms, File viruses, malicious VB, Java scripts, Trojans, Backdoors, boot sector, partition table and macro viruses.

You can purchase Solo antivirus using the link