From; Sophos Alert System: Name: W32/Mytob-C Type: Win32 worm Date: 12 April 2005 A virus identity (IDE) file which provides protection is available now from the Sophos website, and will be incorporated into the June 2005 (3.94) release of Sophos Anti-Virus. Customers using EM Library, PureMessage or any of our Sophos small business solutions will be automatically protected at their next scheduled update. At the time of writing, Sophos has received no reports from users affected by this worm. However, we have issued this advisory following enquiries to our support department from customers. Note: The IDE issued for W32/Mytob-C at 05:40 GMT on 1 March also contained detection for W32/Sdbot-VR, W32/Forbot-EL, Troj/Goldun-M, Troj/BagleDl-K, Troj/StartPa-EZ, Troj/StartPa-FB, Troj/BagleDl-L, Troj/StartPa-EY and Troj/Bancban-BO. This IDE has now been updated to enhance detection of W32/Mytob-C. Information about W32/Mytob-C can be found at: http://www.sophos.com/virusinfo/analyses/w32mytobc.html W32/Mytob-C is a mass-mailing worm with IRC backdoor functionality which can also infect computers vulnerable to the LSASS (MS04-011) exploit. When first run the worm copies itself to the Windows system folder as wfdmgr.exe and creates the following registry entries so as to auto-start: HKLM\Software\Microsoft\Windows\CurrentVersion\Run LSA wfdmgr.exe HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices LSA wfdmgr.exe HKLM\Software\Microsoft\OLE LSA wfdmgr.exe HKLM\System\CurrentControlSet\Control\Lsa LSA wfdmgr.exe HKCU\Software\Microsoft\Windows\CurrentVersion\Run LSA wfdmgr.exe HKCU\Software\Microsoft\OLE LSA wfdmgr.exe HKCU\System\CurrentControlSet\Control\Lsa LSA wfdmgr.exe The worm will attempt to harvest email addresses from the local hard disk by scanning files with extensions WAB, PL, ADB, TBB, DBX, ASP, PHP, SHTL and HTM. Emails sent by W32/Mytob-C have the following layout: Subject line chosen from: Error Status Server Report Mail Transaction Failed Mail Delivery System hello hi Message text chosen from: This is a multi-part message in MIME format. Mail transaction failed. Partial message is available. The message contains Unicode characters and has been sent as a binary attachment. The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment. Attached filename chosen from the following with an extension chosen from (bat cmd exe scr pif zip): message test data file text doc readme document This IDE file also includes detection for: W32/Sdbot-VR http://www.sophos.com/virusinfo/analyses/w32sdbotvr.html W32/Forbot-EL http://www.sophos.com/virusinfo/analyses/w32forbotel.html Troj/Goldun-M http://www.sophos.com/virusinfo/analyses/trojgoldunm.html Troj/BagleDl-K http://www.sophos.com/virusinfo/analyses/trojbagledlk.html Troj/StartPa-EZ http://www.sophos.com/virusinfo/analyses/trojstartpaez.html Troj/StartPa-FB http://www.sophos.com/virusinfo/analyses/trojstartpafb.html Troj/BagleDl-L http://www.sophos.com/virusinfo/analyses/trojbagledll.html Troj/StartPa-EY http://www.sophos.com/virusinfo/analyses/trojstartpaey.html Troj/Bancban-BO http://www.sophos.com/virusinfo/analyses/trojbancbanbo.html Download the IDE file from: http://www.sophos.com/downloads/ide/mytob-c.ide Download all the IDE files available for the current version of Sophos Anti-Virus in a single compressed file. The file is available in two formats: Zip file: http://www.sophos.com/downloads/ide/ides.zip Self-extracting file: http://www.sophos.com/downloads/ide/ides.exe Read about how to use IDE files at http://www.sophos.com/downloads/ide/using.html *********** MIKE"S REPLY SEPARATOR *********** Mike ~ It is a good day if I learned something new. Editor MikesWhatsNews see a sample on my web page http://www3.telus.net/mikebike <mikeswhatsnews-request@xxxxxxxxxxxxx?Subject=subscribe> http://www3.telus.net/mikebike/worm_removal.htm See my Anti-Virus pages http://virusinfo.hackfix.org/index <virusinfo-request@xxxxxxxxxxxxx?Subject=subscribe> A Technical Support Alliance and OWTA Charter Member