TSPY_ZBOT.LCP
PWS-Zbot.gen.arj (McAfee); Trojan-Downloader.Win32.Andromeda.eso (Kaspersky)
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
58,880 bytes
EXE
No
29 Nov 2012
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\Welou
- %User Profile%\Application Data\Peceiv
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other System Modifications
This spyware adds the following registry keys:
HKEY_LOCAL_MACHINE\software\microsoft\
windows\currentversion\Policies\
Explorer\Run
HKEY_CURRENT_USER\Software\Microsoft\
Woocwu
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%windir%\explorer.exe = "%windir%\explorer.exe"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile\AuthorizedApplications\
List
%windir%\explorer.exe = "%windir%\explorer.exe"
Dropping Routine
This spyware drops the following files:
- %User Temp%\0001318a.exe
- %User Profile%\Welou\idylvi.exe
- %User Profile%\Peceiv\ydaxmoa.nel
(Note: %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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other Details
This spyware deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.300
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
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_LOCAL_MACHINE\software\microsoft\windows\currentversion\Policies\Explorer
- Run
- In HKEY_CURRENT_USER\Software\Microsoft
- Woocwu
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.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %windir%\explorer.exe = "%windir%\explorer.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List
- %windir%\explorer.exe = "%windir%\explorer.exe"
Step 4
Search and delete these components
- %User Temp%\0001318a.exe
- %User Profile%\Welou\idylvi.exe
- %User Profile%\Peceiv\ydaxmoa.nel
Step 5
Search and delete these folders
- %User Profile%\Application Data\Welou
- %User Profile%\Application Data\Peceiv
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.LCP. 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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