Worm/Lovgate.F - Worm

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Summary

Full description

Statistics

Virus:	Worm/Lovgate.F
Date discovered:	13/05/2003
Type:	Worm
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low to medium
Damage Potential:	Medium
Static file:	Yes
File size:	107.008 Bytes
MD5 checksum:	5d73aba7169ebfd2bdfd99437d5d8b11
IVDF version:	6.19.00.15 - Tue, 13 May 2003 16:51 (GMT+1)

General Methods of propagation:
   • Email
   • Local network

Aliases:
   • Symantec: W32.HLLW.Lovgate.G@mm
   • Mcafee: W32/Lovgate.f@M
   • Kaspersky: Email-Worm.Win32.LovGate.f
   • F-Secure: W32/Lovgate.F@mm
   • Sophos: W32/Lovgate-E
   • Panda: W32/Lovgate.F
   • Eset: Win32/Lovgate.G
   • Bitdefender: Win32.LovGate.F@mm

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops malicious files
   • Uses its own Email engine
   • Registry modification

Files It copies itself to the following locations:
   • %SYSDIR%\IEXPLORE.EXE
   • %SYSDIR%\kernel66.dll
   • %SYSDIR%\RAVMOND.exe
   • %SYSDIR%\WinDriver.exe
   • %SYSDIR%\WinGate.exe
   • %SYSDIR%\WinHelp.exe
   • %SYSDIR%\winrpc.exe

The following files are created:

– %SYSDIR%\111.dll (81920 bytes) Further investigation pointed out that this file is malware, too. Detected as: Worm/Lovgate.F.2

– %SYSDIR%\ily668.dll (81920 bytes) Further investigation pointed out that this file is malware, too. Detected as: Worm/Lovgate.F.2

– %SYSDIR%\reg678.dll (81920 bytes) Further investigation pointed out that this file is malware, too. Detected as: Worm/Lovgate.F.2

– %SYSDIR%\Task688.dll (81920 bytes) Further investigation pointed out that this file is malware, too. Detected as: Worm/Lovgate.F.2

Registry One of the following values is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "WinHelp"="%SYSDIR%\WinHelp.exe"
   • "WinGate initialize"="%SYSDIR%\WinGate.exe -remoteshell"
   • "Remote Procedure Call Locator"="RUNDLL32.EXE reg678.dll ondll_reg"
   • "Program In Windows"="%SYSDIR%\IEXPLORE.EXE"

The following registry keys are added in order to load the services after reboot:

– [HKLM\SYSTEM\CurrentControlSet\Services\ll_reg]
   • "Type"=dword:00000010
     "Start"=dword:00000002
     "ErrorControl"=dword:00000001
     "ImagePath"=Rundll32.exe Task688.dll ondll_server
     "DisplayName"="ll_reg"
     "ObjectName"="LocalSystem"

– [HKLM\SYSTEM\CurrentControlSet\Services\
   NetMeeting Remote Desktop (RPC) Sharing]
   • "Type"=dword:00000010
     "Start"=dword:00000002
     "ErrorControl"=dword:00000001
     "ImagePath"=Rundll32.exe Task688.dll ondll_server
     "DisplayName"="NetMeeting Remote Desktop (RPC) Sharing"
     "ObjectName"="LocalSystem"

– [HKLM\SYSTEM\CurrentControlSet\Services\
   Windows Management Instrumentation Driver Extension]
   • "Type"=dword:00000010
     "Start"=dword:00000002
     "ErrorControl"=dword:00000001
     "ImagePath"=%SYSDIR%\WinDriver.exe -start_server
     "DisplayName"="Windows Management Instrumentation Driver Extension"
     "ObjectName"="LocalSystem"

The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   New value:
   • "run"="RAVMOND.exe"

– [HKLM\SOFTWARE\Classes\txtfile\shell\open\command]
   New value:
   • @="winrpc.exe %1"

Email It contains an integrated SMTP engine in order to send Spam emails. A direct connection with the destination server will be established. The characteristics are described in the following:
It uses the Messaging Application Programming Interface (MAPI) in order to send a reply to emails stored in the inbox. The characteristics are further described:

From:
The sender address is spoofed.
The sender address is the user's Outlook account.

To:
– Email addresses found in specific files on the system.
– Email addresses gathered from WAB (Windows Address Book)

Subject:
One of the following:
   • Reply to this!
   • Let's Laugh
   • Last Update
   • for you
   • Great
   • Help
   • Attached one Gift for u..
   • Hi Dear
   • Hi
   • See the attachement

Body:
The body of the email is one of the lines:
   • For further assistance, please contact!
   • Copy of your message, including all the headers is attached.
   • This is the last cumulative update.
   • Tiger Woods had two eagles Friday during his victory over Stephen Leaney. (AP Photo/Denis Poroy)
   • Send reply if you want to be official beta tester.
   • This message was created automatically by mail delivery software (Exim).
   • It's the long-awaited film version of the Broadway hit. Set in the roaring 20's, this is the story of Chicago chorus girl Roxie Hart (Zellweger), who shoots her unfaithful lover (West).
   • Adult content!!! Use with parental advisory.
   • Patrick Ewing will give Knick fans something to cheer about Friday night.
   • Send me your comments...

Attachment:
The filename of the attachment is one of the following:
   • About_Me.txt.pif
   • driver.exe
   • Doom3 Preview!!!.exe
   • enjoy.exe
   • YOU_are_FAT!.TXT.pif
   • Source.exe
   • Interesting.exe
   • README.TXT.pif
   • images.pif
   • Pics.ZIP.scr

The attachment is a copy of the malware itself.

Mailing Search addresses:
It searches the following file for email addresses:
• *.ht*

MX Server:
It has the ability to contact the MX server:
• smtp.163.com

Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It drops copies of itself to the following network shares:
   • Are you looking for Love.doc.exe
   • autoexec.bat
   • The world of lovers.txt.exe
   • How To Hack Websites.exe
   • Panda Titanium Crack.zip.exe
   • Mafia Trainer!!!.exe
   • 100 free essays school.pif
   • AN-YOU-SUCK-IT.txt.pif
   • Sex_For_You_Life.JPG.pif
   • CloneCD + crack.exe
   • Age of empires 2 crack.exe
   • MoviezChannelsInstaler.exe
   • Star Wars II Movie Full Downloader.exe
   • Winrar + crack.exe
   • SIMS FullDownloader.zip.exe
   • MSN Password Hacker and Stealer.exe

It uses the following login information in order to gain access to the remote machine:

– The following list of usernames:
   • Guest
   • Administrator

– The following list of passwords:
   • zxcv; yxcv; xxx; xp; win; test123; test; temp123; temp; sybase; super;
      sex; secret; pwd; pw123; pw; pc; Password; owner; oracle; mypc123;
      mypc; mypass123; mypass; love; login; Login; Internet; home;
      godblessyou; god; enable; database; computer; alpha; admin123; Admin;
      abcd; aaa; aa; 88888888; 2600; 2003; 2002; 123asd; 123abc; 123456789;
      1234567; 123123; 121212; 12; 11111111; 110; 007; 00000000; 000000; 0;
      pass; 54321; 12345; password; passwd; server; sql; !@; $%^&*; !@;
      $%^&; !@; $%^; !@; $%; asdfgh; asdf; !@; $; 1234; 111; 11; root;
      abc123; 12345678; abcdefg; abcdef; abc; 888888; 666666; 111111; admin;
      administrator; guest; 654321; 123456; 321; 123

IP address generation:
It creates random IP addresses while it keeps the first three octets from its own address. Afterwards it tries to establish a connection with the created addresses.

Backdoor The following port is opened:

– %SYSDIR%\lsass.exe on TCP port 1092 in order to provide a remote Shell.

Injection – It injects the following file into a process: %SYSDIR%\111.dll

– It injects a backdoor routine into a process.

Process name:
• %SYSDIR%\lsass.exe

Miscellaneous Mutex:
It creates the following Mutexes:
   • CTF.Compart.Mutex
   • CTF.Asm.Mutex
   • CTF.Layouts.Mutex
   • CTF.TMD.Mutex
   • CTF.TimListCache.FMP

File details Programming language:
The malware program was written in MS Visual C++.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
• Aspack

See a brief description here.

Description inserted by Petre Galan on Mon, 05 Oct 2009 17:01 (GMT+1)
Description updated by Petre Galan on Tue, 06 Oct 2009 14:04 (GMT+1)

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