WORM_DROPPER.PB

 Analysis by: Christopher Daniel So

 ALIASES:

Worm:Win32/Emerleox.K (Microsoft); Worm.Win32.AutoRun.aim (Kaspersky); Mal/TinyDL-T (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This worm arrives by connecting affected removable drives to a system.

It deletes registry entries, causing some applications and programs to not function properly.

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

It modifies certain registry entries to hide Hidden files.

  TECHNICAL DETAILS

File Size:

35,474 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

18 Jan 2011

Arrival Details

This worm arrives by connecting affected removable drives to a system.

Installation

This worm drops the following copies of itself into the affected system:

  • %Program Files%\meex.exe
  • %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • %Program Files%\Common Files\System\intfljg.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It drops the following files:

  • %Program Files%\Common Files\Microsoft Shared\kttrogc.inf
  • %Program Files%\Common Files\System\kttrogc.inf
  • %System%\verclsids.exe - copy of %System%\verclsid.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
ogjebnl = "%Program Files%\Common Files\Microsoft Shared\osgjaaj.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
kttrogc = "%Program Files%\Common Files\System\intfljg.exe"

Other System Modifications

This worm deletes the following files:

  • %System%\verclsid.exe

(Note: %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_CURRENT_USER\Software\xoahvr

HKEY_CURRENT_USER\Software\frticb

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wuauserv
Start = 4

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wscsvc
Start = 4

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess
Start = 4

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
Type = checkbox2

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

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Minimal\
{4D36E967-E325-11CE-BFC1-08002BE10318}

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Network\
{4D36E967-E325-11CE-BFC1-08002BE10318}

It deletes the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Minimal\
{4D36E967-E325-11CE-BFC1-08002BE10318}
(Default) = DiskDrive

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot\Network\
{4D36E967-E325-11CE-BFC1-08002BE10318}
(Default) = DiskDrive

Propagation

This worm drops the following copy of itself in all physical and removable drives:

  • {drive letter}:\ogjebnl.exe

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

Other Details

This worm modifies the following registry entries to hide Hidden files:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = 0

(Note: The default value data of the said registry entry is 1.)

It does the following:

  • Creates the following registry entry under this key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{anti-virus program name}
    Debugger = "%Program Files%\Common Files\Microsoft Shared\osgjaaj.exe"

    Note: {anti-virus program name} can be any of the following:
    • 360rpt.exe
    • 360Safe.exe
    • 360tray.exe
    • adam.exe
    • AgentSvr.exe
    • AppSvc32.exe
    • ArSwp.exe
    • AST.exe
    • autoruns.exe
    • AvastU3.exe
    • avconsol.exe
    • avgrssvc.exe
    • AvMonitor.exe
    • avp.com
    • avp.exe
    • CCenter.exe
    • ccSvcHst.exe
    • EGHOST.exe
    • FileDsty.exe
    • FTCleanerShell.exe
    • FYFireWall.exe
    • ghost.exe
    • HijackThis.exe
    • IceSword.exe
    • iparmo.exe
    • Iparmor.exe
    • irsetup.exe
    • isPwdSvc.exe
    • kabaload.exe
    • KaScrScn.SCR
    • KASMain.exe
    • KASTask.exe
    • KAV32.exe
    • KAVDX.exe
    • KAVPF.exe
    • KAVPFW.exe
    • KAVSetup.exe
    • KAVStart.exe
    • KISLnchr.exe
    • KMailMon.exe
    • KMFilter.exe
    • KPFW32.exe
    • KPFW32X.exe
    • KPfwSvc.exe
    • KRegEx.exe
    • KRepair.com
    • KsLoader.exe
    • KVCenter.kxp
    • KvDetect.exe
    • KvfwMcl.exe
    • KVMonXP.kxp
    • KVMonXP_1.kxp
    • kvol.exe
    • kvolself.exe
    • KvReport.kxp
    • KVScan.kxp
    • KVSrvXP.exe
    • KVStub.kxp
    • kvupload.exe
    • kvwsc.exe
    • KvXP.kxp
    • KvXP_1.kxp
    • KWatch.exe
    • KWatch9x.exe
    • KWatchX.exe
    • loaddll.exe
    • MagicSet.exe
    • mcconsol.exe
    • mmqczj.exe
    • mmsk.exe
    • Navapsvc.exe
    • Navapw32.exe
    • nod32.exe
    • nod32krn.exe
    • nod32kui.exe
    • NPFMntor.exe
    • PFW.exe
    • PFWLiveUpdate.exe
    • QHSET.exe
    • QQDoctor.exe
    • QQKav.exe
    • QQLiveUpdate.exe
    • QQSC.exe
    • QQUpdateCenter.exe
    • Ras.exe
    • Rav.exe
    • RavMon.exe
    • RavMonD.exe
    • RavStub.exe
    • RavTask.exe
    • RegClean.exe
    • rfwcfg.exe
    • rfwmain.exe
    • rfwsrv.exe
    • RsAgent.exe
    • Rsaupd.exe
    • rstrui.exe
    • runiep.exe
    • safelive.exe
    • scan32.exe
    • shcfg32.exe
    • SmartUp.exe
    • SREng.EXE
    • symlcsvc.exe
    • SysSafe.exe
    • Timwp.exe
    • TrojanDetector.exe
    • Trojanwall.exe
    • TrojDie.kxp
    • UIHost.exe
    • UmxAgent.exe
    • UmxAttachment.exe
    • UmxCfg.exe
    • UmxFwHlp.exe
    • UmxPol.exe
    • upiea.exe
    • UpLive.exe
    • USBCleaner.exe
    • vsstat.exe
    • webscanx.exe
    • WoptiClean.exe
    • zjb.exe

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.774.16

VSAPI PATTERN Date:

18 Jan 2011

VSAPI PATTERN Date:

1/18/2011 12:00:00 AM

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

Identify and delete files detected as WORM_DROPPER.PB using either the Startup Disk or Recovery Console

[ Learn More ]

Step 3

Restoring Deleted Registry Keys

  1. Still in Registry Editor, in the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>
    Control>SafeBoot>Minimal
  2. Right-click on the key and choose New>Key. Change the value of the new key to:
    {4D36E967-E325-11CE-BFC1-08002BE10318}
  3. Right-click on the value name and choose Modify. Change the value data of this entry to:
    DiskDrive
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>
    Control>SafeBoot>Network
  5. Right-click on the key and choose New>Key. Change the value of the new key to:
    {4D36E967-E325-11CE-BFC1-08002BE10318}
  6. Right-click on the value name and choose Modify. Change the value data of this entry to:
    DiskDrive
  7. Close Registry Editor.

Step 4

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_CURRENT_USER\Software
    • frticb
  • In HKEY_CURRENT_USER\Software
    • xoahvr

Step 5

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
    • ogjebnl = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • kttrogc = %Program Files%\Common Files\System\intfljg.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360rpt.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360Safe.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360tray.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\adam.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AgentSvr.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AppSvc32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ArSwp.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AST.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autoruns.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvastU3.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avconsol.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avgrssvc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvMonitor.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.com
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\CCenter.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ccSvcHst.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\EGHOST.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FileDsty.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FTCleanerShell.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FYFireWall.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ghost.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HijackThis.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\IceSword.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\iparmo.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Iparmor.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\irsetup.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\isPwdSvc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kabaload.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KaScrScn.SCR
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASMain.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASTask.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAV32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVDX.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPF.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPFW.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVSetup.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVStart.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KISLnchr.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMailMon.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMFilter.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KPFW32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KPFW32X.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KPfwSvc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KRegEx.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KRepair.com
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KsLoader.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVCenter.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KvDetect.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KvfwMcl.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVMonXP.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVMonXP_1.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kvol.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kvolself.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KvReport.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVScan.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVSrvXP.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVStub.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kvupload.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kvwsc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KvXP.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KvXP_1.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KWatch.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KWatch9x.exe
    • Debugger =%Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KWatchX.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\loaddll.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MagicSet.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mcconsol.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmqczj.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmsk.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Navapsvc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Navapw32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\nod32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\nod32krn.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\nod32kui.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\NPFMntor.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\PFW.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\PFWLiveUpdate.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QHSET.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQDoctor.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQKav.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQLiveUpdate.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQSC.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQUpdateCenter.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Ras.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Rav.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavMon.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavMonD.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavStub.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavTask.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RegClean.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwcfg.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwmain.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwsrv.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RsAgent.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Rsaupd.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\runiep.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\safelive.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\scan32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\shcfg32.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\SmartUp.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\SREng.EXE
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\symlcsvc.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\SysSafe.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Timwp.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\TrojanDetector.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Trojanwall.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\TrojDie.kxp
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UIHost.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UmxAgent.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UmxAttachment.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UmxCfg.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UmxFwHlp.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UmxPol.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\upiea.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UpLive.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\USBCleaner.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\vsstat.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\webscanx.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\WoptiClean.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\zjb.exe
    • Debugger = %Program Files%\Common Files\Microsoft Shared\osgjaaj.exe

Step 6

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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv
    • From: Start = 4
      To: Start = 2
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc
    • From: Start=4
      To: Start = 2
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
    • From: Start=4
      To: Start = 2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
    • From: Type = checkbox2
      To: Type = checkbox
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
    • From: ShowSuperHidden = 0
      To: ShowSuperHidden = 1

Step 7

Restoring a File to its Original Location

  1. Click Start>Run.
  2. In the text box, type the following:
    command /c copy %System%\verclsids.exe %System%\verclsid.exe
  3. Press Enter.

Step 8

Search and delete this file

[ 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\kttrogc.inf
%Program Files%\Common Files\System\kttrogc.inf
%System%\verclsids.exe

Step 9

Scan your computer with your Trend Micro product to delete files detected as WORM_DROPPER.PB. 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.


Did this description help? Tell us how we did.