Name: I-Worm.Lovgate. Category: Viruses Description: Details I-Worm.Lovgate.a I-Worm.Lovgate.a (aka Supnot.a) is a worm virus spreading via the Internet as an attachment to infected emails. The worm also spreads through local area networks and has a backdoor routine. There are several worm variants known which are very similar to each other. The worm itself is a Windows PE EXE file, written in Microsoft Visual C++, and compressed by AsPack. The compressed file size is about 85K, decompressed size - about 200K. The worm activates from infected email only when a user clicks on the attached file. While spreading through local area networks the worm tries to run its remote copies by using WinNT functions. When run the worm installs itself to the system, runs its spreading and backdoor routines. Installing While installing the worm copies itself to the Windows system directory under several names and registers these files in the system registry auto-run key (under WinNT) and/or in the "run" command in the WIN.INI file (under Win9x). Worm copies have the following names: rpcsrv.exe syshelp.exe winrpc.exe WinGate.exe WinRpcsrv.exe The registry keys are: [HKCUSoftwareMicrosoftWindows NTCurrentVersionWindows] "Run"="rpcsrv.exe" [HKLMSoftwareMicrosoftWindowsCurrentVersionRun] "syshelp"="%SystemDir%syshelp.exe" [HKLMSoftwareMicrosoftWindowsCurrentVersionRun] "WinGate initialize"="%SystemDir%WinGate.exe -remoteshell" "Module Call initialize"="RUNDLL32.EXE reg.dll ondll_reg" [HKCRtxtfileshellopencommand] "winrpc.exe %1" Spreading: email To spread in emails 'supnot' uses two different methods: 1. The worm looks for "*.HT*"-files (HTM, HTML) in the current directory, Windows directory and the "My Documents" directory (including subdirectories as well), scans them for email-like text strings and sends infected messages to addresses found. To send infected message the worm uses a direct connection to the default SMTP server, or connects to the "smtp.163.com" server. Following are different variations of 'supnot' message attributes: Subject: Text: Attachment: Cracks! Check our list and mail your requests! CrkList.exe The patch I think all will work fine. Patch.exe Last Update This is the last cumulative update. LUPdate.exe Do not release This is the pack ;) Pack.exe Beta Send reply if you want to be official beta tester. _SetupB.exe Help I'm going crazyall please try to find the bug! Source.exe Evaluation copy Test it 30 days for free. Setup.exe Pr0n! Adult content!!! Use with parental advisory. Sex.exe Roms Test this ROM! IT ROCKS!. Roms.exe Documents Send me your comments... Docs.exe The worm gets emails from Inboxes and "answers" them by using Windows MAPI functions. Replies look like: Subject: Re: [original email subject] Text: [user name] wrote: ==== > [original email text] ==== [email domain name] account auto-reply: ' I'll try to reply as soon as possible. Take a look to the attachment and send me your opinion! ' > Get your FREE [email domain name] account now! < for example: The attached file name is randomly selected from the following variants: pics.exe SETUP.EXE images.exe Card.EXE joke.exe billgt.exe PsPGame.exe midsong.exe news_doc.exe s3msong.exe hamster.exe docs.exe tamagotxi.exe humor.exe searchURL.exe fun.exe Infecting Local Networks The worm finds network resources (shared writeable disks and directories) and copies itself to them under randomly chosen names: pics.exe SETUP.EXE images.exe Card.EXE joke.exe billgt.exe PsPGame.exe midsong.exe news_doc.exe s3msong.exe hamster.exe docs.exe tamagotxi.exe humor.exe searchURL.exe fun.exe If a network resource is password protected it also tries to request 'write' access using the following information: Login: "guest", "Administrator" Password: "123", "321", "123456", "654321", "administrator", "admin", "111111", "666666", "888888", "abc", "abcdef", "abcdefg", "12345678", "abc123" If the login is successful the worm creates a remote copy of itself named "stg.exe" and tries to launch it on the remote computer. Backdoor Supnot launches a "backdoor" routine that uses the IPC (Interprocess Communication) technique: it creates a pipe connected to a command processor that is launched on the victim computer - CMD.EXE in Windows NT/2000/XP or COMMAND.COM in Windows 9x/ME. This allows the worm's "owner" to control the victim computer remotely. The backdoor is launched three different ways: as a thread in the worm's process as a part of the "LSASS.EXE" process (under WinNT) as stand-alone DLL-files "ily.dll", "Task.dll", "reg.dll" that are stored in the Windows system directory. The three methods of executing the backdoor carry the identical payload routine. Other While sending e-mail messages, the worm creates a temporary file called "CH0016.TMP" in the Windows temporary directory. The worm also sends a 'notification' e-mail to its "owner" that contains the infected computer's name, IP address, and current user name. This email contains the following "copyright" string: My I-WORM-and-IPC-20168 running!