TROJ_VILSEL.JM
Virus:Win32/Expiro.AL (Microsoft); PWS-Zbot.gen.hb (McAfee); Trojan.Win32.Vilsel.beeb (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.KD.384971 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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
324,608 bytes
EXE
No
08 Nov 2011
Arrival Details
This Trojan 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 Trojan creates the following folders:
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other System Modifications
This Trojan deletes the following files:
- %Windows%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{3B20B0AB-1ABF-438E-AD44-71162A3BC5FD}.crmlog
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
Microsoft\Imapi
LogSessionName = "stdout"
(Note: The default value data of the said registry entry is stdout.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
Microsoft\Imapi
Active = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
Microsoft\Imapi
ControlFlags = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
Microsoft\Imapi\ImapiSvc
Guid = "8107d8e9-e323-49f5-bba2-abc35c243dca"
(Note: The default value data of the said registry entry is 8107d8e9-e323-49f5-bba2-abc35c243dca.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
Microsoft\Imapi\ImapiSvc
BitNames = " ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort"
(Note: The default value data of the said registry entry is ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort.)
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\dmio\Encapsulation Info
HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\dmload\EncapsulationPending
Dropping Routine
This Trojan drops the following files:
- %System%\cisvc.vir
- %System%\clipsrv.vir
- %System%\dllhost.vir
- %System%\dmadmin.vir
- %System%\imapi.vir
- %System%\msiexec.vir
- %System%\locator.vir
- %System%\rsvp.vir
- %System%\smlogsvc.vir
- %System%\tlntsvr.vir
- %System%\wbem\wmiapsrv.vir
- %System%\magnify.vir
- %System%\narrator.vir
- %System%\osk.vir
- %System%\utilman.vir
- %Program Files%\Outlook Express\wab.vir
- %System%\cmd.vir
- %Program Files%\Windows Media Player\wmplayer.vir
- %System%\notepad.vir
- %System%\mobsync.vir
- %System%\tourstart.vir
- %Program Files%\Outlook Express\msimn.vir
- %System%\rcimlby.vir
- %System%\mnmsrvc.vir
- %Windows%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{D18EAE61-5F69-442E-9067-DE4ACF8AE006}.crmlog
- %System%\msdtc.vir
- %System%\netdde.vir
- %System%\sessmgr.vir
- %Program Files%\winpcap\rpcapd.vir
- %System%\scardsvr.vir
- %System%\vssvc.vir
- %System%\accwiz.vir
- %System%\calc.vir
- %System%\mstsc.vir
- %System%\sndrec32.vir
- %System%\sndvol32.vir
- %System%\mspaint.vir
- %System%\ntbackup.vir
- %System%\charmap.vir
- %System%\cleanmgr.vir
- %System%\usmt\migwiz.vir
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.vir
- %System%\Restore\rstrui.vir
- %Program Files%\Windows NT\Accessories\wordpad.vir
- %System%\odbcad32.vir
- %System%\freecell.vir
- %System%\mshearts.vir
- %System%\winmine.vir
- %Program Files%\Windows NT\Pinball\PINBALL.vir
- %System%\sol.vir
- %System%\spider.vir
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.vir
- %Program Files%\Movie Maker\moviemk.vir
- %System%\wupdmgr.vir
- %Desktop%\vcredist_x86.vir
- %System%\cisvc.exe
- %System%\clipsrv.exe
- %System%\dllhost.exe
- %System%\dmadmin.exe
- %System%\imapi.exe
- %System%\msiexec.exe
- %System%\locator.exe
- %System%\rsvp.exe
- %System%\smlogsvc.exe
- %System%\tlntsvr.exe
- %System%\wbem\wmiapsrv.exe
- %System%\magnify.exe
- %System%\narrator.exe
- %System%\osk.exe
- %System%\utilman.exe
- %Program Files%\Outlook Express\wab.exe
- %System%\cmd.exe
- %Program Files%\Windows Media Player\wmplayer.exe
- %System%\notepad.exe
- %System%\mobsync.exe
- %System%\tourstart.exe
- %Program Files%\Outlook Express\msimn.exe
- %System%\rcimlby.exe
- %System%\mnmsrvc.exe
- %System%\msdtc.exe
- %System%\netdde.exe
- %System%\sessmgr.exe
- %Program Files%\winpcap\rpcapd.exe
- %System%\scardsvr.exe
- %System%\vssvc.exe
- %System%\accwiz.exe
- %System%\calc.exe
- %System%\mstsc.exe
- %System%\sndrec32.exe
- %System%\sndvol32.exe
- %System%\mspaint.exe
- %System%\ntbackup.exe
- %System%\charmap.exe
- %System%\cleanmgr.exe
- %System%\usmt\migwiz.exe
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
- %System%\Restore\rstrui.exe
- %Program Files%\Windows NT\Accessories\wordpad.exe
- %System%\odbcad32.exe
- %System%\freecell.exe
- %System%\mshearts.exe
- %System%\winmine.exe
- %Program Files%\Windows NT\Pinball\PINBALL.EXE
- %System%\sol.exe
- %System%\spider.exe
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
- %Program Files%\Movie Maker\moviemk.exe
- %System%\wupdmgr.exe
- %Desktop%\vcredist_x86.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restore this modified 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\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\Imapi
- From: LogSessionName = "stdout"
To: LogSessionName = "stdout"
- From: LogSessionName = "stdout"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\Imapi
- From: Active = "1"
To: Active = "1"
- From: Active = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\Imapi
- From: ControlFlags = "1"
To: ControlFlags = "1"
- From: ControlFlags = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\Imapi\ImapiSvc
- From: Guid = "8107d8e9-e323-49f5-bba2-abc35c243dca"
To: Guid = "8107d8e9-e323-49f5-bba2-abc35c243dca"
- From: Guid = "8107d8e9-e323-49f5-bba2-abc35c243dca"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\Imapi\ImapiSvc
- From: BitNames = " ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort"
To: BitNames = " ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort"
- From: BitNames = " ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort"
Step 3
Search and delete these folders
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
Step 4
Search and delete these files
- %System%\cisvc.vir
- %System%\clipsrv.vir
- %System%\dllhost.vir
- %System%\dmadmin.vir
- %System%\imapi.vir
- %System%\msiexec.vir
- %System%\locator.vir
- %System%\rsvp.vir
- %System%\smlogsvc.vir
- %System%\tlntsvr.vir
- %System%\wbem\wmiapsrv.vir
- %System%\magnify.vir
- %System%\narrator.vir
- %System%\osk.vir
- %System%\utilman.vir
- %Program Files%\Outlook Express\wab.vir
- %System%\cmd.vir
- %Program Files%\Windows Media Player\wmplayer.vir
- %System%\notepad.vir
- %System%\mobsync.vir
- %System%\tourstart.vir
- %Program Files%\Outlook Express\msimn.vir
- %System%\rcimlby.vir
- %System%\mnmsrvc.vir
- %Windows%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{D18EAE61-5F69-442E-9067-DE4ACF8AE006}.crmlog
- %System%\msdtc.vir
- %System%\netdde.vir
- %System%\sessmgr.vir
- %Program Files%\winpcap\rpcapd.vir
- %System%\scardsvr.vir
- %System%\vssvc.vir
- %System%\accwiz.vir
- %System%\calc.vir
- %System%\mstsc.vir
- %System%\sndrec32.vir
- %System%\sndvol32.vir
- %System%\mspaint.vir
- %System%\ntbackup.vir
- %System%\charmap.vir
- %System%\cleanmgr.vir
- %System%\usmt\migwiz.vir
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.vir
- %System%\Restore\rstrui.vir
- %Program Files%\Windows NT\Accessories\wordpad.vir
- %System%\odbcad32.vir
- %System%\freecell.vir
- %System%\mshearts.vir
- %System%\winmine.vir
- %Program Files%\Windows NT\Pinball\PINBALL.vir
- %System%\sol.vir
- %System%\spider.vir
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.vir
- %Program Files%\Movie Maker\moviemk.vir
- %System%\wupdmgr.vir
- %Desktop%\vcredist_x86.vir
- %System%\cisvc.exe
- %System%\clipsrv.exe
- %System%\dllhost.exe
- %System%\dmadmin.exe
- %System%\imapi.exe
- %System%\msiexec.exe
- %System%\locator.exe
- %System%\rsvp.exe
- %System%\smlogsvc.exe
- %System%\tlntsvr.exe
- %System%\wbem\wmiapsrv.exe
- %System%\magnify.exe
- %System%\narrator.exe
- %System%\osk.exe
- %System%\utilman.exe
- %Program Files%\Outlook Express\wab.exe
- %System%\cmd.exe
- %Program Files%\Windows Media Player\wmplayer.exe
- %System%\notepad.exe
- %System%\mobsync.exe
- %System%\tourstart.exe
- %Program Files%\Outlook Express\msimn.exe
- %System%\rcimlby.exe
- %System%\mnmsrvc.exe
- %System%\msdtc.exe
- %System%\netdde.exe
- %System%\sessmgr.exe
- %Program Files%\winpcap\rpcapd.exe
- %System%\scardsvr.exe
- %System%\vssvc.exe
- %System%\accwiz.exe
- %System%\calc.exe
- %System%\mstsc.exe
- %System%\sndrec32.exe
- %System%\sndvol32.exe
- %System%\mspaint.exe
- %System%\ntbackup.exe
- %System%\charmap.exe
- %System%\cleanmgr.exe
- %System%\usmt\migwiz.exe
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
- %System%\Restore\rstrui.exe
- %Program Files%\Windows NT\Accessories\wordpad.exe
- %System%\odbcad32.exe
- %System%\freecell.exe
- %System%\mshearts.exe
- %System%\winmine.exe
- %Program Files%\Windows NT\Pinball\PINBALL.EXE
- %System%\sol.exe
- %System%\spider.exe
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
- %Program Files%\Movie Maker\moviemk.exe
- %System%\wupdmgr.exe
- %Desktop%\vcredist_x86.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_VILSEL.JM. 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.
- %Windows%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{3B20B0AB-1ABF-438E-AD44-71162A3BC5FD}.crmlog
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
Step 7
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\System\CurrentControlSet\Services\dmio
- Encapsulation Info
- In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\dmload
- EncapsulationPending
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