TROJ_BANKER.OLE
Trojan:Win32/Bumat!rts, TrojanSpy:Win32/Mafod!rts (Microsoft); [000c3aec.EXE]:Generic.dx, [000554ec.EXE\000554ec.EXE\0005ca28.EXE]:PWS-Banker!fxc (McAfee); Trojan.Gen (Symantec); Trojan.Win32.Genome.xduz (Kaspersky); Trojan.Win32.Generic!BT, Trojan.Win32.Generic!SB.0 (Sunbelt); MemScan:Trojan.Generic.3111373 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
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
Ïðîâåðêà îáíîâëåíèÿ = "%System%\CheckUp.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\AppEvents\Schemes\
Apps\Explorer\Navigating\
Old_Current
HKEY_LOCAL_MACHINE\Software\Chekup
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
DisableScriptDebuggerIE = "yes"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Play_Background_Sounds = "no"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Error Dlg Displayed On Every Error = "no"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Disable Script Debugger = "yes"
(Note: The default value data of the said registry entry is no.)
It deletes the following registry keys:
HKEY_CURRENT_USER\AppEvents\Schemes\
Apps\Explorer\Navigating\
.Current
Dropping Routine
This Trojan drops the following files:
- %System%\inst.exe
- %System%\CheckUpInst.exe
- %System%\CheckUp.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.)
This report is generated via an automated analysis system.
SOLUTION
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
Step 3
Delete this registry key
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\AppEvents\Schemes\Apps\Explorer\Navigating
- Old_Current
- In HKEY_LOCAL_MACHINE\Software
- Chekup
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.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Ïðîâåðêà îáíîâëåíèÿ = "%System%\CheckUp.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- DisableScriptDebuggerIE = "yes"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Play_Background_Sounds = "no"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Error Dlg Displayed On Every Error = "no"
Step 5
Restore this modified 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.
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Disable Script Debugger = "yes"
To: Disable Script Debugger = ""no""
- From: Disable Script Debugger = "yes"
Step 6
Search and delete these files
- %System%\inst.exe
- %System%\CheckUpInst.exe
- %System%\CheckUp.exe
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BANKER.OLE. 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 these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating
- .Current
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