TSPY_GAMETHI.ZZ
Windows 98, ME, NT, 2000, XP, 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
78,592 bytes
EXE
Yes
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 component file(s):
- %system%\netsvcs_v0x0li.dLl - detected as TSPY_GAMETHI.ZZ
- %Program Files%\Internet Explorer\sxs.dll - detected as TSPY_GAMETHI.ZZ
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
It injects itself into the following processes as part of its memory residency routine:
- SVCHOST.EXE
- CSRSS.EXE
- WINLOGON.EXE
- Explorer.exe
Autostart Technique
This spyware registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\netsvcs_v0x0
ImagePath = %System Root%\System32\svchost.exe -k netsvcs
Other System Modifications
This spyware modifies the following registry key(s)/entry(ies) as part of its installation routine:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\ServiceCurrent
@ = b
(Note: The default value data of the said registry entry is a.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
netsvcs = {hex value}
(Note: The default value data of the said registry entry is {hex value}.)
SOLUTION
8.900
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\SYSTEM\CurrentControlSet\Services\
- netsvcs_v0x0
- netsvcs_v0x0
Step 3
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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent
- From: @ = b
To: @ = a
- From: @ = b
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
- From: netsvcs = {hex value}
To: netsvcs = {default hex value}
- From: netsvcs = {hex value}
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_GAMETHI.ZZ. 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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