TSPY_RANBYUS.UTF
Windows
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.
Other System Modifications
This spyware deletes the following files:
- %User Profile%\Cookies\index.dat
- %User Profile%\Cookies\wilbert@atdmt[2].txt
- %User Profile%\Cookies\wilbert@bing[2].txt
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt
- %User Profile%\Cookies\wilbert@c.msn[2].txt
- %User Profile%\Cookies\wilbert@doubleclick[1].txt
- %User Profile%\Cookies\wilbert@microsoft[1].txt
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt
- %User Profile%\Cookies\wilbert@msn[2].txt
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt
- %User Profile%\Cookies\wilbert@www.bing[2].txt
- %User Profile%\Cookies\wilbert@www.msn[1].txt
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
vORfKfGQySpSrjG = "{random characters}"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\SystemRestore
Dropping Routine
This spyware drops the following files:
- %System%\NrCBQrvfmJHjLx.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
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
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 NT\CurrentVersion\Winlogon
- vORfKfGQySpSrjG = "{random characters}"
Step 3
Search and delete this file
- %System%\NrCBQrvfmJHjLx.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_RANBYUS.UTF. 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 5
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.
- %User Profile%\Cookies\index.dat
- %User Profile%\Cookies\wilbert@atdmt[2].txt
- %User Profile%\Cookies\wilbert@bing[2].txt
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt
- %User Profile%\Cookies\wilbert@c.msn[2].txt
- %User Profile%\Cookies\wilbert@doubleclick[1].txt
- %User Profile%\Cookies\wilbert@microsoft[1].txt
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt
- %User Profile%\Cookies\wilbert@msn[2].txt
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt
- %User Profile%\Cookies\wilbert@www.bing[2].txt
- %User Profile%\Cookies\wilbert@www.msn[1].txt
Step 6
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_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion
- SystemRestore
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