TROJ_DROPPR.BECI

January 24, 2013

Analysis by: Anthony Joe Melgarejo

ALIASES:

Trojan.Dropper (Symantec)

PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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:

6,128,128 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

22 Jan 2013

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.

Installation

This Trojan drops the following files:

%Desktop%\Free PDF Unlocker.lnk
%Start Menu%\Programs\Free PDF Unlocker\Free PDF Unlocker.lnk
%Start Menu%\Programs\Free PDF Unlocker\Uninstall Free PDF Unlocker.lnk
%Application Data%\MCommon\config.dat
%Application Data%\MCommon\sites.dat
%Application Data%\MCommon\uid.dat
%Application Data%\MCommon\uinfo.dat
%Application Data%\MCommon\vinfo.dat
%Application Data%\MCommon\WindowsLiveUpdate.exe
%Application Data%\WinLive\Interop.SHDocVw.dll
%Application Data%\WinLive\MSHTMLSubset.dll
%Application Data%\WinLive\WinLive.dll
%Application Data%\Mozilla\Firefox\Extensions
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content\addlist.js
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content\em.xul
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content\hashtable.js
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content\overlay.xul
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\content\update.js
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\skin
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome\skin\mozilla-logo.png
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\chrome.manifest
%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix\install.rdf
%User Temp%\MTemp\chrome
%User Temp%\MTemp\chrome\content
%User Temp%\MTemp\chrome\content\addlist.js
%User Temp%\MTemp\chrome\content\em.xul
%User Temp%\MTemp\chrome\content\hashtable.js
%User Temp%\MTemp\chrome\content\overlay.xul
%User Temp%\MTemp\chrome\content\update.js
%User Temp%\MTemp\chrome\skin
%User Temp%\MTemp\chrome\skin\mozilla-logo.png
%User Temp%\MTemp\chrome.manifest
%User Temp%\MTemp\install.rdf
%Program Files%\Free PDF Unlocker\AxInterop.XtremeCommandBars.dll
%Program Files%\Free PDF Unlocker\AxInterop.XtremeSkinFramework.dll
%Program Files%\Free PDF Unlocker\Codejock.CommandBars.v12.1.1.lic
%Program Files%\Free PDF Unlocker\Codejock.CommandBars.v12.1.1.ocx
%Program Files%\Free PDF Unlocker\Codejock.SkinFramework.v12.1.1.lic
%Program Files%\Free PDF Unlocker\Codejock.SkinFramework.v12.1.1.ocx
%Program Files%\Free PDF Unlocker\Dictionary.txt
%Program Files%\Free PDF Unlocker\dotnetfx35setup.exe
%Program Files%\Free PDF Unlocker\Free PDF Unlocker.application
%Program Files%\Free PDF Unlocker\Free PDF Unlocker.exe.config
%Program Files%\Free PDF Unlocker\Free PDF Unlocker.exe.manifest
%Program Files%\Free PDF Unlocker\Interop.XtremeCommandBars.dll
%Program Files%\Free PDF Unlocker\Interop.XtremeSkinFramework.dll
%Program Files%\Free PDF Unlocker\itextsharp.dll
%Program Files%\Free PDF Unlocker\styles
%Program Files%\Free PDF Unlocker\styles\Office2007Silver.dll
%Program Files%\Free PDF Unlocker\styles\Vista.cjstyles
%Program Files%\Free PDF Unlocker\unins000.dat
%Program Files%\Free PDF Unlocker\unins000.exe

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

It drops and executes the following files:

%Program Files%\Free PDF Unlocker\Free PDF Unlocker.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

It creates the following folders:

%Start Menu%\Programs\Free PDF Unlocker
%Application Data%\MCommon
%Application Data%\WinLive
%User Temp%\MTemp
%Program Files%\Free PDF Unlocker

(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

Autostart Technique

This Trojan adds the following registry keys to install itself as a Browser Helper Object (BHO):

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{2adefb8e-b923-35e6-86e2-2b7841f5d2a2}

It creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
WindowsLiveUpdate = "%Application Data%\MCommon\WindowsLiveUpdate.exe"

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\IE.PerformancePack

HKEY_CLASSES_ROOT\Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

HKEY_CURRENT_USER\Software\Free PDF Unlocker

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Stats\{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\BAP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\PPP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASBACP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASCCP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASEAP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASIPCP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASIPHLP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASMAN

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASPAP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASQEC

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASSPAP

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\RASTAPI

HKEY_CLASSES_ROOT\IE.PerformancePack\CLSID

HKEY_CLASSES_ROOT\CLSID\{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Free PDF Unlocker_is1

It adds the following registry entries:

HKEY_CLASSES_ROOT\Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
0 = ".NET Category"

HKEY_CURRENT_USER\Software\Mozilla\
Firefox\Extensions
hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Approved Extensions
{2ADEFB8E-B923-35e6-86E2-2B7841F5D2A2} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\
Firefox\Extensions
hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0002
EnableForRas = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0002
EnableForRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0002
EnableForOutboundRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0003
EnableForRas = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0003
EnableForRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0003
EnableForOutboundRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0004
EnableForRas = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0004
EnableForRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0004
EnableForOutboundRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0005
EnableForRas = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0005
EnableForRouting = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0005
EnableForOutboundRouting = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
(Default) = "Blog This in Windows Live"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
IpOutLowWatermark = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
IpOutHighWatermark = "5"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
NbfOutLowWatermark = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
NbfOutHighWatermark = "5"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
NbfInLowWatermark = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\RasMan\Parameters
NbfInHighWatermark = "5"

HKEY_CLASSES_ROOT\IE.PerformancePack
(Default) = "IE.PerformancePack"

HKEY_CLASSES_ROOT\IE.PerformancePack\CLSID
(Default) = "{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}"

HKEY_CLASSES_ROOT\CLSID\{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
(Default) = "Blog This in Windows Live"

SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.674.02

FIRST VSAPI PATTERN DATE:

22 Jan 2013

VSAPI OPR PATTERN File:

9.675.00

VSAPI OPR PATTERN Date:

23 Jan 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

Free PDF Unlocker.exe

Step 3

Remove TROJ_DROPPR.BECI by using its own Uninstall option

[ Learn More ]

To uninstall the grayware process

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- WindowsLiveUpdate = "%Application Data%\MCommon\WindowsLiveUpdate.exe"
In HKEY_CLASSES_ROOT\Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
- 0 = ".NET Category"
In HKEY_CURRENT_USER\Software\Mozilla\Firefox\Extensions
- hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"
In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Approved Extensions
- {2ADEFB8E-B923-35e6-86E2-2B7841F5D2A2} = "{random values}"
In HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Firefox\Extensions
- hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0002
- EnableForRas = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0002
- EnableForRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0002
- EnableForOutboundRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0003
- EnableForRas = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0003
- EnableForRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0003
- EnableForOutboundRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0004
- EnableForRas = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0004
- EnableForRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0004
- EnableForOutboundRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0005
- EnableForRas = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0005
- EnableForRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0005
- EnableForOutboundRouting = "0"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- IpOutLowWatermark = "1"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- IpOutHighWatermark = "5"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- NbfOutLowWatermark = "1"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- NbfOutHighWatermark = "5"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- NbfInLowWatermark = "1"
In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters
- NbfInHighWatermark = "5"

To delete the registry value this malware created:

Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>RunOnce
In the right panel, locate and delete the entry:
WindowsLiveUpdate = "%Application Data%\MCommon\WindowsLiveUpdate.exe"
In the left panel of the Registry Editor window, double-click the following:
HKEY_CLASSES_ROOT>Component Categories>{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
In the right panel, locate and delete the entry:
0 = ".NET Category"
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Mozilla>Firefox>Extensions
In the right panel, locate and delete the entry:
hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Approved Extensions
In the right panel, locate and delete the entry:
{2ADEFB8E-B923-35e6-86E2-2B7841F5D2A2} = "{random values}"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Mozilla>Firefox>Extensions
In the right panel, locate and delete the entry:
hotfix@mozilla.org = "%Application Data%\Mozilla\Firefox\Extensions\MozillaHotfix"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Class>{4D36E972-E325-11CE-BFC1-08002bE10318}>0002
In the right panel, locate and delete the entry:
EnableForRas = "0"
Again In the right panel, locate and delete the entry:
EnableForRouting = "0"
Again In the right panel, locate and delete the entry:
EnableForOutboundRouting = "0"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Class>{4D36E972-E325-11CE-BFC1-08002bE10318}>0003
In the right panel, locate and delete the entry:
EnableForRas = "0"
Again In the right panel, locate and delete the entry:
EnableForRouting = "0"
Again In the right panel, locate and delete the entry:
EnableForOutboundRouting = "0"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Class>{4D36E972-E325-11CE-BFC1-08002bE10318}>0004
In the right panel, locate and delete the entry:
EnableForRas = "0"
Again In the right panel, locate and delete the entry:
EnableForRouting = "0"
Again In the right panel, locate and delete the entry:
EnableForOutboundRouting = "0"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Class>{4D36E972-E325-11CE-BFC1-08002bE10318}>0005
In the right panel, locate and delete the entry:
EnableForRas = "0"
Again In the right panel, locate and delete the entry:
EnableForRouting = "0"
Again In the right panel, locate and delete the entry:
EnableForOutboundRouting = "0"
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>RasMan>Parameters
In the right panel, locate and delete the entry:
IpOutLowWatermark = "1"
Again In the right panel, locate and delete the entry:
IpOutHighWatermark = "5"
Again In the right panel, locate and delete the entry:
NbfOutLowWatermark = "1"
Again In the right panel, locate and delete the entry:
NbfOutHighWatermark = "5"
Again In the right panel, locate and delete the entry:
NbfInLowWatermark = "1"
Again In the right panel, locate and delete the entry:
NbfInHighWatermark = "5"
Close Registry Editor.

Step 5

Delete this registry key

[ Learn More ]

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
- {2adefb8e-b923-35e6-86e2-2b7841f5d2a2}
In HKEY_CLASSES_ROOT
- IE.PerformancePack
In HKEY_CLASSES_ROOT\Component Categories
- {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
In HKEY_CURRENT_USER\Software
- Free PDF Unlocker
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Stats
- {2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In HKEY_CLASSES_ROOT\CLSID
- {2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- BAP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- PPP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASBACP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASCCP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASEAP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASIPCP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASIPHLP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASMAN
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASPAP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASQEC
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASSPAP
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing
- RASTAPI

To delete registry keys this malware/grayware created:

Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>Browser Helper Objects
Still in the left panel, locate and delete the key:
{2adefb8e-b923-35e6-86e2-2b7841f5d2a2}
In the left panel of the Registry Editor window, double-click the following:
HKEY_CLASSES_ROOT
Still in the left panel, locate and delete the key:
IE.PerformancePack
In the left panel of the Registry Editor window, double-click the following:
HKEY_CLASSES_ROOT>Component Categories
Still in the left panel, locate and delete the key:
{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software
Still in the left panel, locate and delete the key:
Free PDF Unlocker
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Ext>Stats
Still in the left panel, locate and delete the key:
{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In the left panel of the Registry Editor window, double-click the following:
HKEY_CLASSES_ROOT>CLSID
Still in the left panel, locate and delete the key:
{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID
Still in the left panel, locate and delete the key:
{2ADEFB8E-B923-35E6-86E2-2B7841F5D2A2}
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Tracing
Still in the left panel, locate and delete the key:
BAP
Again Still in the left panel, locate and delete the key:
PPP
Again Still in the left panel, locate and delete the key:
RASBACP
Again Still in the left panel, locate and delete the key:
RASCCP
Again Still in the left panel, locate and delete the key:
RASEAP
Again Still in the left panel, locate and delete the key:
RASIPCP
Again Still in the left panel, locate and delete the key:
RASIPHLP
Again Still in the left panel, locate and delete the key:
RASMAN
Again Still in the left panel, locate and delete the key:
RASPAP
Again Still in the left panel, locate and delete the key:
RASQEC
Again Still in the left panel, locate and delete the key:
RASSPAP
Again Still in the left panel, locate and delete the key:
RASTAPI
Close Registry Editor.

Step 6

Search and delete these folders

[ Learn More ]

Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

%Application Data%\MCommon
%Application Data%\WinLive
%User Temp%\MTemp

Step 7

Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.BECI. 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.

TROJ_DROPPR.BECI

OVERVIEW

TECHNICAL DETAILS

SOLUTION

資源

支援

關於趨勢科技

香港暨澳門辦事處

TROJ_DROPPR.BECI

OVERVIEW

TECHNICAL DETAILS

SOLUTION

資源

支援

關於趨勢科技

香港暨澳門辦事處

美洲

中東及非洲

歐洲

亞太地區