TSPY_ZBOT.LDV
VirTool:Win32/CeeInject.gen!HL (Microsoft); PWS-Zbot.gen.aop (McAfee); Trojan.Zbot.HXQ (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
TECHNICAL DETAILS
Arrival Details
This spyware 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 spyware creates the following folders:
- %User Profile%\Application Data\Gova
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{C8B0FB29-AD41-AD40-5C09-405F58D6634D} = "%User Profile%\Gova\viopov.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Laen
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Laen
26f77hjh = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Laen
22382cc3 = "dIO/gw==_CHAR(0x03)__CHAR(0x03)_j_CHAR(0x0C)_?s?U"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
14745:UDP = "14745:UDP:*:Enabled:UDP 14745"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
16188:TCP = "16188:TCP:*:Enabled:TCP 16188"
HKEY_CURRENT_USER\Software\Microsoft\
Laen
58014bb = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Laen
22382cc3 = "{random values}"
Dropping Routine
This spyware drops the following files:
- %User Profile%\Application Data\Gova
- %User Profile%\Gova\viopov.exe
- %Application Data%\ihhi.suh
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)
Other Details
This spyware deletes itself after execution.
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\Software\Microsoft
- Laen
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {C8B0FB29-AD41-AD40-5C09-405F58D6634D} = "%User Profile%\Gova\viopov.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Laen
- 26f77hjh = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Laen
- 22382cc3 = "dIO/gw==_CHAR(0x03)__CHAR(0x03)_j_CHAR(0x0C)_?s?U"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 14745:UDP = "14745:UDP:*:Enabled:UDP 14745"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 16188:TCP = "16188:TCP:*:Enabled:TCP 16188"
- In HKEY_CURRENT_USER\Software\Microsoft\Laen
- 58014bb = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Laen
- 22382cc3 = "{random values}"
Step 5
Search and delete these files
- %User Profile%\Application Data\Gova
- %User Profile%\Gova\viopov.exe
- %Application Data%\ihhi.suh
Step 6
Search and delete this folder
- %User Profile%\Application Data\Gova
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.LDV. 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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