ALIASES:

Trojan:Win32/Swisyn.J (Microsoft); Generic.dx!bbk4 (McAfee); SpywarePreventer (Symantec); Trojan.Win32.Swisyn.bygj (Kaspersky); BehavesLike.Win32.Malware.dah (mx-v) (Sunbelt); Trojan.FakeAv.BU (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 199,680 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 08 Nov 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Internet = "%Program Files%\Common Files\Microsoft Shared\services.exe"

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\08cachefiletttppp0000B045.rtr
  • %User Temp%\06cachefiletttppp0000B0F0.rtr
  • %User Temp%\06cachefiletttppp0000B110.rtr
  • %User Temp%\13cachefiletttppp00019C79.rtr
  • %User Temp%\13cachefiletttppp00019C99.rtr
  • %User Temp%\08cachefiletttppp0000C8DD.rtr
  • %System%\dllcache\midimap.dll
  • %User Temp%\tp2.tmp
  • %System%\dllcache\ksuser.dll
  • %User Temp%\tp3.tmp
  • %User Temp%\08cachefiletttppp0001A5B1.rtr

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Ime File = "MGT99008.OCX"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Layout Text = "US"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Layout File = "kbdus.dll"

It modifies the following registry entries:

HKEY_CURRENT_USER\Keyboard Layout\Preload
2 = "E0200804"

(Note: The default value data of the said registry entry is e00e0804.)

HKEY_CURRENT_USER\Keyboard Layout\Preload
1 = "E0200804"

(Note: The default value data of the said registry entry is 00000409.)

HKEY_CURRENT_USER\Keyboard Layout\Preload
2 = "00000409"

(Note: The default value data of the said registry entry is e00e0804.)

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\Common Files\Microsoft Shared\A_v_Dvd.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_DVD.dll
  • %Program Files%\Common Files\Microsoft Shared\A_v_Dw.ocx
  • %Program Files%\Common Files\Microsoft Shared\services.exe
  • %Program Files%\Common Files\Microsoft Shared\A_v_AuTo.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_AuTo.dll
  • %Program Files%\Common Files\Microsoft Shared\A_v_bind.au
  • %Program Files%\Common Files\Microsoft Shared\A_v_Tj.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_TT.dll
  • %User Temp%\setupdx.exe
  • %Program Files%\Common Files\Au_ing_Code.ini
  • %Program Files%\Common Files\AmgList.txt
  • %User Temp%\Tp1.tmp
  • %User Temp%\Tp2.tmp
  • %User Temp%\Tp3.tmp
  • %User Temp%\Tp4.tmp
  • %User Temp%\Tp5.tmp
  • %User Temp%\Tp6.tmp
  • %Windows%\fonts\mgt06011.ttf
  • %User Temp%\0000AA49mdd.temp
  • %User Temp%\0000AA59eime.temp
  • %User Temp%\1319458465.dat
  • %User Temp%\1319458485.dat
  • %User Temp%\kb000164fe.nvv
  • %System%\dsound.dll.dat
  • %System Root%\Program Files\Common Files\Microsoft Shared\A_v_tj.au
  • %Windows%\fonts\mgt13001.ttf
  • %User Temp%\00018B24mdd.temp
  • %User Temp%\00018B33eime.temp
  • %User Temp%\1319458522.dat
  • %System%\jahjah06.exe
  • %User Temp%\08cachefiletttppp0000B045.rtr
  • %User Temp%\06cachefiletttppp0000B0F0.rtr
  • %User Temp%\06cachefiletttppp0000B110.rtr
  • %User Temp%\13cachefiletttppp00019C79.rtr
  • %User Temp%\13cachefiletttppp00019C99.rtr
  • %User Temp%\08cachefiletttppp0000C8DD.rtr
  • %System%\YUksuser.dll
  • %System%\ksuser.dll
  • %System%\dllcache\ksuser.dll
  • %System%\YUmidimap.dll
  • %System%\midimap.dll
  • %System%\dllcache\midimap.dll
  • %System%\sysapp8.dll
  • %Program Files%\Internet Explorer\ksuser.dll
  • %Program Files%\Internet Explorer\midimap.dll
  • %Program Files%\Internet Explorer\comres.dll
  • %Program Files%\360\360se3\ksuser.dll
  • %Program Files%\360\360se3\midimap.dll
  • %Program Files%\360\360se3\comres.dll
  • %Program Files%\SogouExplorer\ksuser.dll
  • %Program Files%\SogouExplorer\midimap.dll
  • %Program Files%\SogouExplorer\comres.dll
  • %System%\sysapp17.dll
  • %Program Files%\Common Files\System\kb000164fe.nvv
  • %System%\DllCache\dsound.dll
  • %System%\jahjah13.exe
  • %User Temp%\08cachefiletttppp0001A5B1.rtr

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://dl.{BLOCKED}e.info:81/setupdx.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx.txt
  • http://qhuc1.{BLOCKED}p.biz:120/dx/1.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx/2.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx/3.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx/4.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx/5.exe
  • http://qhuc1.{BLOCKED}p.biz:120/dx/6.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts
    • E0200804

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Internet="%Program Files%\Common Files\Microsoft Shared\services.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
    • Ime File="MGT99008.OCX"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
    • Layout Text="US"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
    • Layout File="kbdus.dll"

Step 5

Restore this modified registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Keyboard Layout\Preload
    • From: 2="E0200804"
      To: 2=e00e0804
  • In HKEY_CURRENT_USER\Keyboard Layout\Preload
    • From: 1="E0200804"
      To: 1=00000409
  • In HKEY_CURRENT_USER\Keyboard Layout\Preload
    • From: 2="00000409"
      To: 2=e00e0804

Step 6

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Program Files%\Common Files\Microsoft Shared\A_v_Dvd.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_DVD.dll
  • %Program Files%\Common Files\Microsoft Shared\A_v_Dw.ocx
  • %Program Files%\Common Files\Microsoft Shared\services.exe
  • %Program Files%\Common Files\Microsoft Shared\A_v_AuTo.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_AuTo.dll
  • %Program Files%\Common Files\Microsoft Shared\A_v_bind.au
  • %Program Files%\Common Files\Microsoft Shared\A_v_Tj.ocx
  • %Program Files%\Common Files\Microsoft Shared\A_v_TT.dll
  • %User Temp%\setupdx.exe
  • %Program Files%\Common Files\Au_ing_Code.ini
  • %Program Files%\Common Files\AmgList.txt
  • %User Temp%\Tp1.tmp
  • %User Temp%\Tp2.tmp
  • %User Temp%\Tp3.tmp
  • %User Temp%\Tp4.tmp
  • %User Temp%\Tp5.tmp
  • %User Temp%\Tp6.tmp
  • %Windows%\fonts\mgt06011.ttf
  • %User Temp%\0000AA49mdd.temp
  • %User Temp%\0000AA59eime.temp
  • %User Temp%\1319458465.dat
  • %User Temp%\1319458485.dat
  • %User Temp%\kb000164fe.nvv
  • %System%\dsound.dll.dat
  • %System Root%\Program Files\Common Files\Microsoft Shared\A_v_tj.au
  • %Windows%\fonts\mgt13001.ttf
  • %User Temp%\00018B24mdd.temp
  • %User Temp%\00018B33eime.temp
  • %User Temp%\1319458522.dat
  • %System%\jahjah06.exe
  • %User Temp%\08cachefiletttppp0000B045.rtr
  • %User Temp%\06cachefiletttppp0000B0F0.rtr
  • %User Temp%\06cachefiletttppp0000B110.rtr
  • %User Temp%\13cachefiletttppp00019C79.rtr
  • %User Temp%\13cachefiletttppp00019C99.rtr
  • %User Temp%\08cachefiletttppp0000C8DD.rtr
  • %System%\YUksuser.dll
  • %System%\ksuser.dll
  • %System%\dllcache\ksuser.dll
  • %System%\YUmidimap.dll
  • %System%\midimap.dll
  • %System%\dllcache\midimap.dll
  • %System%\sysapp8.dll
  • %Program Files%\Internet Explorer\ksuser.dll
  • %Program Files%\Internet Explorer\midimap.dll
  • %Program Files%\Internet Explorer\comres.dll
  • %Program Files%\360\360se3\ksuser.dll
  • %Program Files%\360\360se3\midimap.dll
  • %Program Files%\360\360se3\comres.dll
  • %Program Files%\SogouExplorer\ksuser.dll
  • %Program Files%\SogouExplorer\midimap.dll
  • %Program Files%\SogouExplorer\comres.dll
  • %System%\sysapp17.dll
  • %Program Files%\Common Files\System\kb000164fe.nvv
  • %System%\DllCache\dsound.dll
  • %System%\jahjah13.exe
  • %User Temp%\08cachefiletttppp0001A5B1.rtr

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SPYBOT.USJ28VC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 8

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\08cachefiletttppp0000B045.rtr
  • %User Temp%\06cachefiletttppp0000B0F0.rtr
  • %User Temp%\06cachefiletttppp0000B110.rtr
  • %User Temp%\13cachefiletttppp00019C79.rtr
  • %User Temp%\13cachefiletttppp00019C99.rtr
  • %User Temp%\08cachefiletttppp0000C8DD.rtr
  • %System%\dllcache\midimap.dll
  • %User Temp%\tp2.tmp
  • %System%\dllcache\ksuser.dll
  • %User Temp%\tp3.tmp
  • %User Temp%\08cachefiletttppp0001A5B1.rtr


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