BKDR_BERBEW.ITX

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

File Size: 94,208 bytes

File Type: EXE

Memory Resident: No

Initial Samples Received Date: 12 May 2015

Arrival Details

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

%System%\Kgbimg32.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{79FEACFF-FFCE-815E-A900-316290B5B738}\
InProcServer32

HKEY_USERS\.DEFAULT\SOFTWARE\
Microsoft\Windows\CurrentVersion\
Explorer\BrowseNewProcess

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{79FEACFF-FFCE-815E-A900-316290B5B738}\InProcServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\ShellServiceObjectDelayLoad
Web Event Logger = "{79FEACFF-FFCE-815E-A900-316290B5B738}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = "0"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1601 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1601 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1601 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1601 = "0"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1601 = "0"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
BrowseNewProcess
BrowseNewProcess = "yes"

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

Dropping Routine

This backdoor drops the following files:

%System%\Kgbimg32.exe
%System%\Lcijafff.dll
%User Temp%\bhpldlne.htm
%User Temp%\blpaojbh.htm
%User Temp%\fgljimmc.htm
%User Temp%\ocinjgcd.htm
%User Temp%\ojebmqin.htm
%User Temp%\hgeokbck.htm
%User Temp%\heipegbd.htm
%User Temp%\ailnpdje.htm
%User Temp%\aofflnab.htm
%User Temp%\jnafjdff.htm
%User Temp%\jmdfeqma.htm
%User Temp%\cijmmilg.htm
%User Temp%\dilicijd.htm
%User Temp%\laigiela.htm
%User Temp%\lgelkoak.htm
%User Temp%\eeeijakg.htm
%User Temp%\opifbgdm.htm
%User Temp%\oibjkmkn.htm
%User Temp%\hdckncff.htm
%User Temp%\bbjjggam.htm
%User Temp%\beifccqa.htm
%User Temp%\ldmhggnk.htm
%User Temp%\lhidhffc.htm
%User Temp%\dohciook.htm
%User Temp%\dccojngd.htm
%User Temp%\mckadlgl.htm
%User Temp%\fdkcnlel.htm
%User Temp%\fhgpokne.htm
%User Temp%\pdhlldpq.htm
%User Temp%\pckmgagk.htm
%User Temp%\haabjgqe.htm
%User Temp%\hoecclon.htm
%User Temp%\aokihkai.htm
%User Temp%\kjjflopa.htm
%User Temp%\kikfjghq.htm
%User Temp%\ekkhfona.htm
%User Temp%\epfdgngk.htm
%User Temp%\nnfmpchi.htm
%User Temp%\nmimkpod.htm
%User Temp%\glapcffk.htm
%User Temp%\gpmlddod.htm
%User Temp%\pcbgdadb.htm
%User Temp%\pcedjabp.htm
%User Temp%\hejfickm.htm
%User Temp%\iaqgndqa.htm

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

This report is generated via an automated analysis system.

Minimum Scan Engine: 9.750

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

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_CLASSES_ROOT\CLSID\{79FEACFF-FFCE-815E-A900-316290B5B738}
- InProcServer32

In HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
- BrowseNewProcess

Step 3

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\Classes\CLSID\{79FEACFF-FFCE-815E-A900-316290B5B738}\InProcServer32
- ThreadingModel = "Apartment"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad
- Web Event Logger = "{79FEACFF-FFCE-815E-A900-316290B5B738}"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- GlobalUserOffline = "0"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- 1601 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- 1601 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 1601 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- From: 1601 = "0"
  To: 1601 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- From: 1601 = "0"
  To: 1601 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
- From: BrowseNewProcess = "yes"
  To: BrowseNewProcess = ""yes""

To restore registry values this malware/grayware modified:

Open Registry Editor. To do this:
- On Windows 2000, XP, and Server 2003:
  Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
- On Windows Vista, 7, and Server 2008:
  Click the Start button, type REGEDIT in the Search input field then press Enter.
- On Windows 8, 8.1, and Server 2012:
  Right-click on the lower left corner of the screen and click Run, type REGEDIT in the Run input field, and then press Enter.
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>0
In the right panel, locate the registry value:
1601 = "0"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>1
In the right panel, locate the registry value:
1601 = "0"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>2
In the right panel, locate the registry value:
1601 = "0"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>3
In the right panel, locate the registry value:
1601 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1601 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>4
In the right panel, locate the registry value:
1601 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1601 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>BrowseNewProcess
In the right panel, locate the registry value:
BrowseNewProcess = "yes"
Right-click on the value name and choose Modify. Change the value data of this entry to:
BrowseNewProcess = "yes"
Close Registry Editor.

Step 5

Search and delete these components

[ Learn More ]

There may be some components 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.

%System%\Kgbimg32.exe
%System%\Lcijafff.dll
%User Temp%\bhpldlne.htm
%User Temp%\blpaojbh.htm
%User Temp%\fgljimmc.htm
%User Temp%\ocinjgcd.htm
%User Temp%\ojebmqin.htm
%User Temp%\hgeokbck.htm
%User Temp%\heipegbd.htm
%User Temp%\ailnpdje.htm
%User Temp%\aofflnab.htm
%User Temp%\jnafjdff.htm
%User Temp%\jmdfeqma.htm
%User Temp%\cijmmilg.htm
%User Temp%\dilicijd.htm
%User Temp%\laigiela.htm
%User Temp%\lgelkoak.htm
%User Temp%\eeeijakg.htm
%User Temp%\opifbgdm.htm
%User Temp%\oibjkmkn.htm
%User Temp%\hdckncff.htm
%User Temp%\bbjjggam.htm
%User Temp%\beifccqa.htm
%User Temp%\ldmhggnk.htm
%User Temp%\lhidhffc.htm
%User Temp%\dohciook.htm
%User Temp%\dccojngd.htm
%User Temp%\mckadlgl.htm
%User Temp%\fdkcnlel.htm
%User Temp%\fhgpokne.htm
%User Temp%\pdhlldpq.htm
%User Temp%\pckmgagk.htm
%User Temp%\haabjgqe.htm
%User Temp%\hoecclon.htm
%User Temp%\aokihkai.htm
%User Temp%\kjjflopa.htm
%User Temp%\kikfjghq.htm
%User Temp%\ekkhfona.htm
%User Temp%\epfdgngk.htm
%User Temp%\nnfmpchi.htm
%User Temp%\nmimkpod.htm
%User Temp%\glapcffk.htm
%User Temp%\gpmlddod.htm
%User Temp%\pcbgdadb.htm
%User Temp%\pcedjabp.htm
%User Temp%\hejfickm.htm
%User Temp%\iaqgndqa.htm

To manually delete a malware/grayware file from an affected system:

• For Windows 2000, Windows XP, and Windows Server 2003:

Right-click Start then click Search....
In the File name* input box, type the following:
%System%\Kgbimg32.exe
%System%\Lcijafff.dll
%User Temp%\bhpldlne.htm
%User Temp%\blpaojbh.htm
%User Temp%\fgljimmc.htm
%User Temp%\ocinjgcd.htm
%User Temp%\ojebmqin.htm
%User Temp%\hgeokbck.htm
%User Temp%\heipegbd.htm
%User Temp%\ailnpdje.htm
%User Temp%\aofflnab.htm
%User Temp%\jnafjdff.htm
%User Temp%\jmdfeqma.htm
%User Temp%\cijmmilg.htm
%User Temp%\dilicijd.htm
%User Temp%\laigiela.htm
%User Temp%\lgelkoak.htm
%User Temp%\eeeijakg.htm
%User Temp%\opifbgdm.htm
%User Temp%\oibjkmkn.htm
%User Temp%\hdckncff.htm
%User Temp%\bbjjggam.htm
%User Temp%\beifccqa.htm
%User Temp%\ldmhggnk.htm
%User Temp%\lhidhffc.htm
%User Temp%\dohciook.htm
%User Temp%\dccojngd.htm
%User Temp%\mckadlgl.htm
%User Temp%\fdkcnlel.htm
%User Temp%\fhgpokne.htm
%User Temp%\pdhlldpq.htm
%User Temp%\pckmgagk.htm
%User Temp%\haabjgqe.htm
%User Temp%\hoecclon.htm
%User Temp%\aokihkai.htm
%User Temp%\kjjflopa.htm
%User Temp%\kikfjghq.htm
%User Temp%\ekkhfona.htm
%User Temp%\epfdgngk.htm
%User Temp%\nnfmpchi.htm
%User Temp%\nmimkpod.htm
%User Temp%\glapcffk.htm
%User Temp%\gpmlddod.htm
%User Temp%\pcbgdadb.htm
%User Temp%\pcedjabp.htm
%User Temp%\hejfickm.htm
%User Temp%\iaqgndqa.htm
In the Look In drop-down list, select My Computer then press Enter.
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen,then click File Explorer.
In the Search Computer/This PC input box, type:
%System%\Kgbimg32.exe
%System%\Lcijafff.dll
%User Temp%\bhpldlne.htm
%User Temp%\blpaojbh.htm
%User Temp%\fgljimmc.htm
%User Temp%\ocinjgcd.htm
%User Temp%\ojebmqin.htm
%User Temp%\hgeokbck.htm
%User Temp%\heipegbd.htm
%User Temp%\ailnpdje.htm
%User Temp%\aofflnab.htm
%User Temp%\jnafjdff.htm
%User Temp%\jmdfeqma.htm
%User Temp%\cijmmilg.htm
%User Temp%\dilicijd.htm
%User Temp%\laigiela.htm
%User Temp%\lgelkoak.htm
%User Temp%\eeeijakg.htm
%User Temp%\opifbgdm.htm
%User Temp%\oibjkmkn.htm
%User Temp%\hdckncff.htm
%User Temp%\bbjjggam.htm
%User Temp%\beifccqa.htm
%User Temp%\ldmhggnk.htm
%User Temp%\lhidhffc.htm
%User Temp%\dohciook.htm
%User Temp%\dccojngd.htm
%User Temp%\mckadlgl.htm
%User Temp%\fdkcnlel.htm
%User Temp%\fhgpokne.htm
%User Temp%\pdhlldpq.htm
%User Temp%\pckmgagk.htm
%User Temp%\haabjgqe.htm
%User Temp%\hoecclon.htm
%User Temp%\aokihkai.htm
%User Temp%\kjjflopa.htm
%User Temp%\kikfjghq.htm
%User Temp%\ekkhfona.htm
%User Temp%\epfdgngk.htm
%User Temp%\nnfmpchi.htm
%User Temp%\nmimkpod.htm
%User Temp%\glapcffk.htm
%User Temp%\gpmlddod.htm
%User Temp%\pcbgdadb.htm
%User Temp%\pcedjabp.htm
%User Temp%\hejfickm.htm
%User Temp%\iaqgndqa.htm
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.

Step 6

Scan your computer with your Trend Micro product to delete files detected as BKDR_BERBEW.ITX. 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.

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