PE_VIRUT.XP
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: File infector
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This file infector 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
122,880 bytes
EXE
No
17 Mar 2017
Arrival Details
This file infector 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 file infector creates the following folders:
- %User Profile%\Microsoft\Speech
- %User Profile%\Speech\Files
- %User Profile%\Files\UserLexicons
- %User Profile%\Microsoft\HTML Help
(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.)
Other System Modifications
This file infector deletes the following files:
- %User Temp%\IMTD.xml
- %User Temp%\IMTF.xml
- %User Temp%\IMT11.xml
- %User Temp%\IMT13.xml
- %User Temp%\IMT15.xml
- %User Temp%\IMT17.xml
- %User Temp%\IMT1C.xml
- %User Temp%\IMT1E.xml
- %User Temp%\IMT20.xml
- %User Temp%\IMT23.xml
- %User Temp%\IMT25.xml
- %User Temp%\IMT27.xml
- %User Temp%\IMT2A.xml
- %User Temp%\IMT2C.xml
- %User Temp%\IMT2E.xml
- %User Temp%\IMT31.xml
- %User Temp%\IMT33.xml
- %User Temp%\IMT35.xml
- %User Temp%\IMT38.xml
- %User Temp%\IMT3A.xml
- %User Temp%\IMT3C.xml
- %User Temp%\IMT3F.xml
- %User Temp%\IMT41.xml
- %User Temp%\IMT43.xml
- %User Temp%\IMT46.xml
- %User Temp%\IMT48.xml
- %User Temp%\IMT4A.xml
- %User Temp%\IMT4D.xml
- %User Temp%\IMT4F.xml
- %User Temp%\IMT51.xml
- %User Temp%\IMT54.xml
- %User Temp%\IMT56.xml
- %User Temp%\IMT58.xml
- %User Temp%\IMT5B.xml
- %User Temp%\IMT5D.xml
- %User Temp%\IMT5F.xml
- %User Temp%\IMT62.xml
- %User Temp%\IMT64.xml
- %User Temp%\IMT66.xml
- %User Temp%\IMT69.xml
- %User Temp%\IMT6B.xml
- %User Temp%\IMT6D.xml
- %User Temp%\IMT70.xml
- %User Temp%\IMT72.xml
- %User Temp%\IMT74.xml
- %User Temp%\IMT77.xml
- %User Temp%\IMT79.xml
- %User Temp%\IMT7B.xml
- %User Temp%\IMT7E.xml
- %User Temp%\IMT80.xml
- %User Temp%\IMT82.xml
- %User Temp%\IMT85.xml
- %User Temp%\IMT87.xml
- %User Temp%\IMT89.xml
- %User Temp%\IMT8C.xml
- %User Temp%\IMT8E.xml
- %User Temp%\IMT90.xml
- %User Temp%\IMT93.xml
- %User Temp%\IMT95.xml
- %User Temp%\IMT97.xml
- %User Temp%\IMT9A.xml
- %User Temp%\IMT9C.xml
- %User Temp%\IMT9E.xml
- %User Temp%\IMTA1.xml
- %User Temp%\IMTA3.xml
- %User Temp%\IMTA5.xml
(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 keys:
HKEY_CURRENT_USER\Software\Microsoft\
Utility Manager
HKEY_CURRENT_USER\Software\Microsoft\
Narrator
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\Voices
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\PhoneConverters
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\CurrentUserLexicon
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon\AppLexicons
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon\{C9E37C15-DF92-4727-85D6-72E5EEB6995A}
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon\{C9E37C15-DF92-4727-85D6-72E5EEB6995A}\
Files
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\AppLexicons
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\AudioOutput
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Utility Manager
ShowWarning = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\Voices
DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\MSSam"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\PhoneConverters
DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\PhoneConverters\Tokens\English"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon
CLSID = "{C9E37C15-DF92-4727-85D6-72E5EEB6995A}"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon
FlushRate = "10"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\CurrentUserLexicon\{C9E37C15-DF92-4727-85D6-72E5EEB6995A}\
Files
Datafile = "%1a%\Microsoft\Speech\Files\UserLexicons\SP_F113782F4E5A42F1815394BA88282E89.dat"
Dropping Routine
This file infector drops the following files:
- %User Profile%\UserLexicons\SP_F113782F4E5A42F1815394BA88282E89.dat
- %User Profile%\HTML Help\hh.dat
(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.)
This report is generated via an automated analysis system.
SOLUTION
9.8
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_CURRENT_USER\Software\Microsoft
- Utility Manager
- In HKEY_CURRENT_USER\Software\Microsoft
- Narrator
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- Voices
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- PhoneConverters
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- CurrentUserLexicon
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon
- AppLexicons
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon
- {C9E37C15-DF92-4727-85D6-72E5EEB6995A}
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon\{C9E37C15-DF92-4727-85D6-72E5EEB6995A}
- Files
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- AppLexicons
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- AudioOutput
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_CURRENT_USER\Software\Microsoft\Utility Manager
- ShowWarning = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\Voices
- DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\MSSam"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\PhoneConverters
- DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\PhoneConverters\Tokens\English"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon
- CLSID = "{C9E37C15-DF92-4727-85D6-72E5EEB6995A}"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon
- FlushRate = "10"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\CurrentUserLexicon\{C9E37C15-DF92-4727-85D6-72E5EEB6995A}\Files
- Datafile = "%1a%\Microsoft\Speech\Files\UserLexicons\SP_F113782F4E5A42F1815394BA88282E89.dat"
Step 4
Search and delete these components
- %User Profile%\UserLexicons\SP_F113782F4E5A42F1815394BA88282E89.dat
- %User Profile%\HTML Help\hh.dat
Step 5
Search and delete these folders
- %User Profile%\Microsoft\Speech
- %User Profile%\Speech\Files
- %User Profile%\Files\UserLexicons
- %User Profile%\Microsoft\HTML Help
Step 6
Scan your computer with your Trend Micro product to clean files detected as PE_VIRUT.XP. 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 7
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%\IMTD.xml
- %User Temp%\IMTF.xml
- %User Temp%\IMT11.xml
- %User Temp%\IMT13.xml
- %User Temp%\IMT15.xml
- %User Temp%\IMT17.xml
- %User Temp%\IMT1C.xml
- %User Temp%\IMT1E.xml
- %User Temp%\IMT20.xml
- %User Temp%\IMT23.xml
- %User Temp%\IMT25.xml
- %User Temp%\IMT27.xml
- %User Temp%\IMT2A.xml
- %User Temp%\IMT2C.xml
- %User Temp%\IMT2E.xml
- %User Temp%\IMT31.xml
- %User Temp%\IMT33.xml
- %User Temp%\IMT35.xml
- %User Temp%\IMT38.xml
- %User Temp%\IMT3A.xml
- %User Temp%\IMT3C.xml
- %User Temp%\IMT3F.xml
- %User Temp%\IMT41.xml
- %User Temp%\IMT43.xml
- %User Temp%\IMT46.xml
- %User Temp%\IMT48.xml
- %User Temp%\IMT4A.xml
- %User Temp%\IMT4D.xml
- %User Temp%\IMT4F.xml
- %User Temp%\IMT51.xml
- %User Temp%\IMT54.xml
- %User Temp%\IMT56.xml
- %User Temp%\IMT58.xml
- %User Temp%\IMT5B.xml
- %User Temp%\IMT5D.xml
- %User Temp%\IMT5F.xml
- %User Temp%\IMT62.xml
- %User Temp%\IMT64.xml
- %User Temp%\IMT66.xml
- %User Temp%\IMT69.xml
- %User Temp%\IMT6B.xml
- %User Temp%\IMT6D.xml
- %User Temp%\IMT70.xml
- %User Temp%\IMT72.xml
- %User Temp%\IMT74.xml
- %User Temp%\IMT77.xml
- %User Temp%\IMT79.xml
- %User Temp%\IMT7B.xml
- %User Temp%\IMT7E.xml
- %User Temp%\IMT80.xml
- %User Temp%\IMT82.xml
- %User Temp%\IMT85.xml
- %User Temp%\IMT87.xml
- %User Temp%\IMT89.xml
- %User Temp%\IMT8C.xml
- %User Temp%\IMT8E.xml
- %User Temp%\IMT90.xml
- %User Temp%\IMT93.xml
- %User Temp%\IMT95.xml
- %User Temp%\IMT97.xml
- %User Temp%\IMT9A.xml
- %User Temp%\IMT9C.xml
- %User Temp%\IMT9E.xml
- %User Temp%\IMTA1.xml
- %User Temp%\IMTA3.xml
- %User Temp%\IMTA5.xml
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