TROJ_KRAP.SMFB
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
TECHNICAL DETAILS
Installation
This Trojan drops the following files:
- %Start Menu%\Programs\Startup\ntuser_mssec.exe
- %UserTemp%\ope2C.exe
- %UserTemp%\16.tmp
- %UserTemp%\svchosty.exe
- %UserTemp%\ope2C.tmp
- %UserTemp%\avto1.exe
- %UserTemp%\60325cahp25ca0.exe
- %UserTemp%\opeF.exe
- %UserTemp%\opeF.tmp
- %UserTemp%\avto2.exe
- %UserTemp%\4_pinnew.exe
- %UserTemp%\5_odbnsy.exe
- %UserTemp%\6_ldry3no.exe
- %UserTemp%\avto.exe
- %UserTemp%\miragge.exe
- %UserTemp%\avto3.exe
- %UserTemp%\q1.exe
- %UserTemp%\teste1_p.exe
- %WINDOWS%\lsass.exe
- %WINDOWS%\svx.exe
- %WINDOWS%\svw.exe
- %WINDOWS%\wdmon.exe
- %WINDOWS%\odbnsy.exe
- %WINDOWS%\svc.exe
- %WINDOWS%\Temp\1B.tmp
- %WINDOWS%\Temp\1A.tmp
- %system%\iiigdc.dll
- %system%\qopoon.dll
- %system%\sdra64.exe
- %system%\lowsec\user.ds
- %system%\lowsec\user.ds.lll
- %system%\lowsec\local.ds
(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.)
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
mlkiiidrv = rundll32.exe "iiigdc.dll",s
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
netw = %WINDOWS%\svw.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
lsass = %WINDOWS%\lsass.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
netx = %WINDOWS%\svx.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
wdmon = %WINDOWS%\wdmon.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
%UserTemp%\\ope2C.exe = %UserTemp%\ope2C.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
iiheccsys = rundll32.exe "qopoon.dll",DllRegisterServer
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
odnexy = %WINDOWS%\odbnsy.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
netc = %WINDOWS%\svc.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
%UserTemp%\\opeF.exe = %UserTemp%\opeF.exe
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
jkjkkldrv = rundll32.exe "iiigdc.dll",s
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = 0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Network
UID = {computer name}_{random numbers}
SOLUTION
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
Restart in Safe Mode
Step 3
Delete this registry value
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.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\mlkiiidrv= rundll32.exe iiigdc.dll,s
netw= %WINDOWS%\svw.exe
\lsass=%WINDOWS%\lsass.exe
netx=%WINDOWS%\svx.exe
wdmon=%WINDOWS%\wdmon.exe
%UserTemp%\ope2C.exe %UserTemp%\ope2C.exe
iiheccsys=rundll32.exe qopoon.dll,DllRegisterServer
odnexy=%WINDOWS%\odbnsy.exe
netc=%WINDOWS%\svc.exe
%UserTemp%\opeF.exe %UserTemp%\opeF.exe
jkjkkldrv=rundll32.exe iiigdc.dll,sRESTORE
Step 4
Delete this registry value
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.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network\UID={computer name}_{random numbers}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\
EnableFirewall=0RESTORE
Step 5
Search and delete these components
- %Start Menu%\Programs\Startup\ntuser_mssec.exe
- %system%\iiigdc.dll
- %system%\lowsec\local.ds
- %system%\lowsec\user.ds
- %system%\lowsec\user.ds.lll
- %system%\qopoon.dll
- %system%\sdra64.exe
- %UserTemp%\16.tmp
- %UserTemp%\4_pinnew.exe
- %UserTemp%\5_odbnsy.exe
- %UserTemp%\60325cahp25ca0.exe
- %UserTemp%\6_ldry3no.exe
- %UserTemp%\avto.exe
- %UserTemp%\avto1.exe
- %UserTemp%\avto2.exe
- %UserTemp%\avto3.exe
- %UserTemp%\miragge.exe
- %UserTemp%\ope2C.exe
- %UserTemp%\ope2C.tmp
- %UserTemp%\opeF.exe
- %UserTemp%\opeF.tmp
- %UserTemp%\q1.exe
- %UserTemp%\svchosty.exe
- %UserTemp%\teste1_p.exe
- %WINDOWS%\lsass.exe
- %WINDOWS%\odbnsy.exe
- %WINDOWS%\svc.exe
- %WINDOWS%\svw.exe
- %WINDOWS%\svx.exe
- %WINDOWS%\Temp\1A.tmp
- %WINDOWS%\Temp\1B.tmp
- %WINDOWS%\wdmon.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_KRAP.SMFB. 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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