frony 0 Report post Posted August 18, 2005 (edited) The worm is a packed PE executable file 22528 bytes long. Installation to system When run, the worm copies under %SYSTEM% directory using the name 'botzor.exe' and creates a named mutex 'B-O-T-Z-O-R' for making sure that only one copy of the worm is run at the same time. Then it adds the following registry entries to ensure that it is started when a user logs on or the system is restarted: [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices] "WINDOWS SYSTEM" = "botzor.exe" The worm also adds the following registry key for diasabling shared access service: [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess] "Start" = "4" Spreading using Plug and Play service vulnerability The worm scans for systems vulnerable to Microsoft Windows Plug and Play service (MS05-039) through TCP/445. It creates 300 threads that connect to random IP addresses within the B-class (255.255.0.0) network of the infected system. First it tests connection to port 445 and if successful, it tries to exploit the vulnerability. If the attack is successful a shell (cmd.exe) is started on port 8888. Through the shell port, the worm sends a ftp script which instructs the remote computer to download and execute the worm from the attacker computer using FTP. The FTP server listens on port 33333 on all infected computers with the purpose of serving out the worm for other hosts that are being infected. The downloaded file is saved as 'haha.exe' on disk. Here's the summary of the ports used in attack: Port 445 - The worm scans for systems vulnerable to PnP exploit through this port Port 33333 - FTP server port on infected systems Port 8888 - The command shell port opened by the exploit code The exploit uses fixed offsets inside Windows 2000 version of umpnpmgr.dll. This means that only Windows 2000 systems (SP0-4) are affected. Please see the following page for detailed information on the vulnerability: http://www.microsoft.com/err/technet/security/ Bot functionality The worm tries to connect to IRC channel at predefined address. The attacker who knows channel password can instruct the bot to execute the following actions: Disconnect/reconnect from the IRC channel Request system information Download and execute files Remove worm from the system Manipulate system security settings Other details Zotob.A modifies system hosts file in order to disable access to certain sites. Following hostnames are redirected to localhost IP address (127.0.0.1): avp.com ca.com customer.symantec.com dispatch.mcafee.com download.mcafee.com ebay.com f-secure.com kaspersky.com kaspersky-labs.com liveupdate.symantec.com liveupdate.symantecliveupdate.com mast.mcafee.com mcafee.com microsoft.com moneybookers.com my-etrust.com nai.com networkassociates.com pandasoftware.com paypal.com rads.mcafee.com secure.nai.com securityresponse.symantec.com sophos.com symantec.com trendmicro.com updates.symantec.com update.symantec.com us.mcafee.com viruslist.com virustotal.com http://www.amazon.com/ http://avp.com/ http://www.ca.com/us.html http://www.ebay.com/ https://www.f-secure.com/de_DE/web/home_de/home http://www.avg.com/de-de/homepage http://usa.kaspersky.com/ http://www.mcafee.com/us/index.html https://www.microsoft.com/de-de https://www.skrill.com/en/ https://www.totaldefense.com/ http://www.mcafee.com/us/index.html http://forums.xisto.com/no_longer_exists/ http://www.pandasecurity.com/germany/ https://www.paypal.com/de/webapps/mpp/home https://www.sophos.com/en-us.aspx https://www.symantec.com/ http://www.trendmicro.de/ https://www.virustotal.com/ The worm also writes the following text to hosts file: Botzor2005 Made By .... Greetz to good friend Coder. Based On HellBot3 MSG to avs: the first av who detect this worm will be the first killed in the next 24hours!!! patch http://www.microsoft.com/err/technet/security/ Notice from BuffaloHELP: Fixed title spelling. When you are pasting from another source you can use tags instead of . URL can be pasted without using any BBcode tags. But thank you for your careful consideration Edited August 18, 2005 by BuffaloHELP (see edit history) Share this post Link to post Share on other sites
BuffaloHelp 24 Report post Posted August 18, 2005 This subject started in the discussion thread http://forums.xisto.com/topic/26242-new-worm-please-note-new-worm-here/ but I'll let this thread live since it provides bit more in depth look into what the worm actually does.I'll also cross reference to the thread mentioned above.Topic closed. Share this post Link to post Share on other sites
