TSPY_INFOSTEAL.ROB
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.
Installation
This spyware creates the following folders:
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\RarSFX0
- %User Profile%\Application Data\DiVGLcwp
- %User Profile%\Application Data\Monitor
- %Program Files%\Client
- %User Profile%\Monitor\Logs
- %User Profile%\Monitor\Files
- %User Profile%\Monitor\Guard
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Other System Modifications
This spyware deletes the following files:
- %User Temp%\RarSFX0\yjVBchp.exe:Zone.Identifier
(Note: %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.)
It adds the following registry entries:
HKEY_CURRENT_USER\Software
4HW2vgaEzjo4Avgt8+C90A== = "kU+Dpkaccip0ZOrmNJepVZ7jYf8FZhpIaq+PlUGfLk4VqGinBJY7RAoXolWWnTXP"
HKEY_CURRENT_USER\Software
2qQy3rYdq8/nlhQEdTquuA== = "VsTrNdhY8df2W30LYUuENg=="
Dropping Routine
This spyware drops the following files:
- __tmp_rar_sfx_access_check_229046
- yjVBchp.exe
- fVzWJrYnjUOgh
- RXubOW
- %User Profile%\DiVGLcwp\3674.xml
- %User Startup%\EAggalwHDh.lnk
- %User Profile%\Guard\1
- %User Profile%\DiVGLcwp\fVzWJrYnjUOgh
- %User Profile%\DiVGLcwp\RXubOW
(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 Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other Details
This spyware connects to the following possibly malicious URL:
- {BLOCKED}.130.79
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
- 4HW2vgaEzjo4Avgt8+C90A== = "kU+Dpkaccip0ZOrmNJepVZ7jYf8FZhpIaq+PlUGfLk4VqGinBJY7RAoXolWWnTXP"
- In HKEY_CURRENT_USER\Software
- 2qQy3rYdq8/nlhQEdTquuA== = "VsTrNdhY8df2W30LYUuENg=="
Step 3
Search and delete these components
- __tmp_rar_sfx_access_check_229046
- yjVBchp.exe
- fVzWJrYnjUOgh
- RXubOW
- %User Profile%\DiVGLcwp\3674.xml
- %User Startup%\EAggalwHDh.lnk
- %User Profile%\Guard\1
- %User Profile%\DiVGLcwp\fVzWJrYnjUOgh
- %User Profile%\DiVGLcwp\RXubOW
Step 4
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\RarSFX0
- %User Profile%\Application Data\DiVGLcwp
- %User Profile%\Application Data\Monitor
- %Program Files%\Client
- %User Profile%\Monitor\Logs
- %User Profile%\Monitor\Files
- %User Profile%\Monitor\Guard
Step 5
Scan your computer with your Trend Micro product to delete files detected as TSPY_INFOSTEAL.ROB. 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 6
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 Temp%\RarSFX0\yjVBchp.exe:Zone.Identifier
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