TR/PSW.Lmir.51149 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/PSW.Lmir.51149
Date discovered:	18/09/2006
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
File size:	51.149 Bytes
MD5 checksum:	c4aac84a1e73d218d4954d59482345a9
VDF version:	6.36.00.24 - Mon, 18 Sep 2006 15:00 (GMT+1)
IVDF version:	6.36.00.34 - Wed, 20 Sep 2006 08:00 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Kaspersky: Trojan-PSW.Win32.WOW.gk
   • TrendMicro: TSPY_LEGMIR.ABF
   • F-Secure: Trojan-PSW.Win32.WOW.gk
   • Sophos: Troj/WoWPWS-Y
   • Eset: Win32/PSW.Legendmir

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops a file
   • Lowers security settings
   • Registry modification
   • Steals information

Files It copies itself to the following locations:
   • %WINDIR%\smss.exe
   • %SYSDIR%\dxdiag.com
   • %SYSDIR%\MSCONFIG.COM
   • %SYSDIR%\regedit.com
   • %SYSDIR%\rund1132.com
   • %SYSDIR%\command.pif
   • %WINDIR%\1.com
   • %WINDIR%\exerouter.exe
   • %WINDIR%\EXP10RER.com
   • %WINDIR%\finders.com
   • %WINDIR%\Debug\DebugProgram.exe
   • D:\command.com
   • %PROGRAM FILES%\Internet Explorer\inexplore.com
   • %PROGRAM FILES%\Common Files\inexplore.pif

The following file is created:

– D:\autorun.inf This is a non malicious text file with the following content:
   • [autorun]
     OPEN=D:\command.com

Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "TProgram"="%WINDIR%\smss.exe"

The following registry keys are added:

– [HKCR\WindowFiles]
– [HKCR\WindowFiles\DefaultIcon]
   • @="%1"

– [HKCR\WindowFiles\Shell]
– [HKCR\WindowFiles\Shell\Open]
– [HKCR\WindowFiles\Shell\Open\Command]
   • @="%WINDIR%\exerouter.exe "%1" %*"

The following registry keys are changed:

– [HKCR\.exe]
   Old value:
   • @="exefile"
   New value:
   • @="WindowFiles"

– [HKLM\SOFTWARE\Classes\htmlfile\shell\open\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\Internet Explorer\inexplore.com" -nohome"

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   Old value:
   • "Check_Associations"="Yes"
   New value:
   • "Check_Associations"="No"

– [HKCR\Applications\iexplore.exe\shell\open\command]
   Old value:
   • @=""%PROGRAM FILES%\Internet Explorer\iexplore.exe" %1"
   New value:
   • @=""%PROGRAM FILES%\Internet Explorer\inexplore.com" %1"

– [HKCR\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
   OpenHomePage\Command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\Internet Explorer\inexplore.com""

– [HKCR\ftp\shell\open\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\Internet Explorer\inexplore.com" %1"

– [HKCR\htmlfile\shell\open\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\Internet Explorer\inexplore.com" -nohome"

– [HKCR\htmlfile\shell\opennew\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\common~1\inexplore.pif" %1"

– [HKCR\http\shell\open\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\common~1\inexplore.pif" -nohome"

– [HKLM\SOFTWARE\Classes\http\shell\open\command]
   Old value:
   • @=%user defined settings%
   New value:
   • @=""%PROGRAM FILES%\common~1\inexplore.pif" -nohome"

– [HKCR\Drive\shell\find\command]
   Old value:
   • @="%SystemRoot%\Explorer.exe"
   New value:
   • @="%SystemRoot%\EXP10RER.com"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • "Shell"="explorer.exe"
   New value:
   • "Shell"="explorer.exe 1"

Process termination Processes with one of the following strings are terminated:
• RAVMON; TROJDIE; KPOP; CCENTER; ASSISTSE; KPFW; AGENTSVR; KV; KREG;
IEFIND; IPARMOR; RULEWIZE; FYGT; RFWSRV; RFWMA; TROJAN; MMSK

Stealing It tries to steal the following information:

– Passwords from the following programs:
   • World of Warcraft
   • Zhengtu
   • World of Legend
   • Legend of Mir

– A logging routine is started after one of the following websites are visited:
   • http://us.logon.worldofwarcraft.com
   • http://eu.logon.worldofwarcraft.com
   • http://tw.logon.worldofwarcraft.com

– It captures:
    • Login information

File details Programming language:
The malware program was written in Visual Basic.

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

See a brief description here.

Description inserted by Monica Ghitun on Wed, 04 Oct 2006 10:53 (GMT+1)
Description updated by Adriana Popa on Fri, 17 Nov 2006 09:59 (GMT+1)

» About Malware
» About Phishing
» Viruses In the Wild

« back