TSPY_PAPRAS.KR
Windows 2000, Windows XP, Windows 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.
It deletes itself after execution.
TECHNICAL DETAILS
227,840 bytes
EXE
No
01 Dec 2012
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
- %Desktop%.ini
- %User Profile%\History.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_left3[1].png
- %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_right3[1].png
- %Temporary Internet Files%\Content.IE5\09RWHJQN\box02[1].gif
- %Temporary Internet Files%\Content.IE5\09RWHJQN\desktop.ini
- %Temporary Internet Files%\Content.IE5\09RWHJQN\top_left3[1].png
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\box04[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\box08[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\desktop.ini
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\header00b[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\table_bottom3[1].png
- %Temporary Internet Files%\Content.IE5\desktop.ini
- %Temporary Internet Files%\Content.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\background[1].gif
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\box06[1].gif
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\desktop.ini
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\table_right3[1].png
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\top_right3[1].png
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\desktop.ini
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\footer00[1].gif
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_left3[1].png
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_top3[1].png
- %Temporary Internet Files%\desktop.ini
(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.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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.. %Temporary Internet Files% is the Temporary Internet Files folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), and Windows Server 2008; C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), and Windows Server 2012.)
It deletes the following folders:
- %User Profile%\History\History.IE5
- %Temporary Internet Files%\Content.IE5\09RWHJQN
- %Temporary Internet Files%\Content.IE5\BVLBNMKH
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6
- %Temporary Internet Files%\Content.IE5
(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.. %Temporary Internet Files% is the Temporary Internet Files folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), and Windows Server 2008; C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), and Windows Server 2012.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Control\Session Manager\AppCertDlls
HKEY_CURRENT_USER\Software\AppDataLow\
Software\Microsoft\Internet Explorer\
Security\AntiPhishing\7926A403-841D-130B-56BD-F8F7EA41AC1B
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager\AppCertDlls
chknhost = "%System%\blasfmon.dll"
HKEY_CURRENT_USER\Software\AppDataLow\
Software\Microsoft\Internet Explorer\
Security\AntiPhishing\7926A403-841D-130B-56BD-F8F7EA41AC1B
ID = "{random values}"
HKEY_CURRENT_USER\Software\AppDataLow\
Software\Microsoft\Internet Explorer\
Security\AntiPhishing\7926A403-841D-130B-56BD-F8F7EA41AC1B
Group = "49b"
Dropping Routine
This spyware drops the following files:
- %System Root%\693718.bat
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
Other Details
This spyware deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.300
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 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\Control\Session Manager
- AppCertDlls
- In HKEY_CURRENT_USER\Software\AppDataLow\Software\Microsoft\Internet Explorer\Security\AntiPhishing
- 7926A403-841D-130B-56BD-F8F7EA41AC1B
Step 3
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_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\AppCertDlls
- chknhost = "%System%\blasfmon.dll"
- In HKEY_CURRENT_USER\Software\AppDataLow\Software\Microsoft\Internet Explorer\Security\AntiPhishing\7926A403-841D-130B-56BD-F8F7EA41AC1B
- ID = "{random values}"
- In HKEY_CURRENT_USER\Software\AppDataLow\Software\Microsoft\Internet Explorer\Security\AntiPhishing\7926A403-841D-130B-56BD-F8F7EA41AC1B
- Group = "49b"
Step 4
Search and delete this file
- %System Root%\693718.bat
Step 5
Scan your computer with your Trend Micro product to delete files detected as TSPY_PAPRAS.KR. 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 Profile%\Cookies\index.dat
- %Desktop%.ini
- %User Profile%\History.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_left3[1].png
- %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_right3[1].png
- %Temporary Internet Files%\Content.IE5\09RWHJQN\box02[1].gif
- %Temporary Internet Files%\Content.IE5\09RWHJQN\desktop.ini
- %Temporary Internet Files%\Content.IE5\09RWHJQN\top_left3[1].png
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\box04[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\box08[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\desktop.ini
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\header00b[1].gif
- %Temporary Internet Files%\Content.IE5\BVLBNMKH\table_bottom3[1].png
- %Temporary Internet Files%\Content.IE5\desktop.ini
- %Temporary Internet Files%\Content.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\background[1].gif
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\box06[1].gif
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\desktop.ini
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\table_right3[1].png
- %Temporary Internet Files%\Content.IE5\ZDGZNKA5\top_right3[1].png
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\desktop.ini
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\footer00[1].gif
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_left3[1].png
- %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_top3[1].png
- %Temporary Internet Files%\desktop.ini
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