TROJ_CARBERP.YTV
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
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.
It modifies the Internet Explorer Zone Settings.
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.
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\SOFTWARE\NVIDIA Corporation
HKEY_CURRENT_USER\SOFTWARE\NVIDIA Corporation\
Global
HKEY_CURRENT_USER\SOFTWARE\NVIDIA Corporation\
Global\nvUpdSrv
It adds the following registry entries:
HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdSrv
value = "{date}"
HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdSrv
GUID = "{GUID}"
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}ksecurityx.hopto.org
- http://{BLOCKED}.{BLOCKED}.15.172
NOTES:
It may pass the following URL parameters:
- /stat?uptime={value}&downlink={value}&uplink={value}&id={id}&statpass={password}&vers
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
- NVIDIA Corporation = ""
- NVIDIA Corporation = ""
Step 4
Reset Internet security settings
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CARBERP.YTV. 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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