TSPY_INFOSTEAL.RNS
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%\Application Data\WLEThjJwJFKr.exe:Zone.Identifier
(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 modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
Load = "%User Profile%\Application Data\WLEThjJwJFKr.exe"
Dropping Routine
This spyware drops the following files:
- %User Profile%\Application Data\WLEThjJwJFKr.exe
- %User Profile%\Application Data\VKkIsaTynXgGxhX
- %User Profile%\Application Data\YEXvPQWnzcgrf
- %User Temp%\VtdqzfsQ.txt
- %User Temp%\RlDYwTwA.txt
- %User Temp%\yzxqS.txt
- %User Temp%\llHX.txt
- %User Temp%\LQKLdCOv.txt
- %User Temp%\sx_win_bin.tmp
(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.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
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
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows
- Load = "%User Profile%\Application Data\WLEThjJwJFKr.exe"
Step 3
Search and delete these components
- %User Profile%\Application Data\WLEThjJwJFKr.exe
- %User Profile%\Application Data\VKkIsaTynXgGxhX
- %User Profile%\Application Data\YEXvPQWnzcgrf
- %User Temp%\VtdqzfsQ.txt
- %User Temp%\RlDYwTwA.txt
- %User Temp%\yzxqS.txt
- %User Temp%\llHX.txt
- %User Temp%\LQKLdCOv.txt
- %User Temp%\sx_win_bin.tmp
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_INFOSTEAL.RNS. 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%\Application Data\WLEThjJwJFKr.exe:Zone.Identifier
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