TSPY_ZBOT.SML2
Trojan:Win32/Neurevt.A (Microsoft); Trojan horse Dropper.Generic8.RWF (AVG)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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.
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 drops the following copies of itself into the affected system:
- %User Temp%\file.exe
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}\vuxrwtqas.exe
(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.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
It creates the following folders:
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
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
LManager = "%User Temp%\file.exe"
Other System Modifications
This spyware modifies the following file(s):
- %User Profile%\Application Data\Microsoft
(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.)
It deletes the following files:
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}\vuxrwtqas.exe:Zone.Identifier
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Win7zip
HKEY_CURRENT_USER\Software\Classes\
CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD\
CG1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
vuxrwtqas.exe
HKEY_LOCAL_MACHINE\Software\Win7zip
HKEY_CURRENT_USER\Software\Classes\
CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD\
CS1
HKEY_CURRENT_USER\Software\Classes\
CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD\
CW1
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Win7zip
Uuid = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Win7zip
Uuid = "{random values}"
It deletes the following registry keys:
HKEY_CURRENT_USER\CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\
136203DD\CW1
Dropping Routine
This spyware drops the following files:
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}\0000a2c7.txt
- %User Profile%\Microsoft\Crypto
- %User Profile%\Crypto\RSA
- %User Profile%\RSA\S-1-5-21-4025279379-4087772427-2915903831-500
- %User Temp%\jmqdwdgbsne.exe
- %User Temp%\file.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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.. %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.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://{BLOCKED}ds-buy-anabolic.com/order.php
- http://{BLOCKED}ur.de/oldbildversuh.exe
This report is generated via an automated analysis system.
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 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
- Win7zip
- In HKEY_CURRENT_USER\Software\Classes\CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD
- CG1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- vuxrwtqas.exe
- In HKEY_LOCAL_MACHINE\Software
- Win7zip
- In HKEY_CURRENT_USER\Software\Classes\CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD
- CS1
- In HKEY_CURRENT_USER\Software\Classes\CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD
- CW1
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
- LManager = "%User Temp%\file.exe"
- In HKEY_CURRENT_USER\Software\Win7zip
- Uuid = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Win7zip
- Uuid = "{random values}"
Step 5
Search and delete these components
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}\0000a2c7.txt
- %User Profile%\Microsoft\Crypto
- %User Profile%\Crypto\RSA
- %User Profile%\RSA\S-1-5-21-4025279379-4087772427-2915903831-500
- %User Temp%\jmqdwdgbsne.exe
- %User Temp%\file.exe
Step 6
Search and delete this folder
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.SML2. 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 deleted/modified files and/or registry entries from backup
*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- %User Profile%\Application Data\Microsoft
Step 9
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %Program Files%\Common Files\buv2ewwhkqkt1skgh6.{2227A280-3AEA-1069-A2DE-08002B30309D}\vuxrwtqas.exe:Zone.Identifier
Step 10
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\CLSID\{8689617C-A226-A34A-ACA8-602A97A3F193}\136203DD
- CW1
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