TROJ_DLOADER.QSJ
Virus.Win32.Lamer.et (Kaspersky)
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.
It deletes itself after execution.
TECHNICAL DETAILS
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.
Other System Modifications
This Trojan deletes the following files:
- %Desktop%\vcredist_x86.exe
- %Desktop%\WinPcap_4_1_2.exe
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
- %Program Files%\Common Files\Microsoft Shared\Speech\sapisvr.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwconn1.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwconn2.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwrmind.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwtutor.exe
- %Program Files%\Internet Explorer\Connection Wizard\inetwiz.exe
- %Program Files%\Internet Explorer\Connection Wizard\isignup.exe
- %Program Files%\Internet Explorer\iedw.exe
- %Program Files%\Messenger\msmsgs.exe
- %Program Files%\Movie Maker\moviemk.exe
- %Program Files%\MSN\MSNCoreFiles\Install\MSN9Components\Digcore.exe
- %Program Files%\MSN\MSNCoreFiles\Install\MSN9Components\Msncli.exe
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
- %Program Files%\MSN Gaming Zone\Windows\bckgzm.exe
- %Program Files%\MSN Gaming Zone\Windows\chkrzm.exe
- %Program Files%\MSN Gaming Zone\Windows\hrtzzm.exe
- %Program Files%\MSN Gaming Zone\Windows\Rvsezm.exe
- %Program Files%\MSN Gaming Zone\Windows\shvlzm.exe
- %Program Files%\MSN Gaming Zone\Windows\zClientm.exe
- %Program Files%\NetMeeting\cb32.exe
- %Program Files%\NetMeeting\conf.exe
- %Program Files%\NetMeeting\wb32.exe
- %Program Files%\Outlook Express\msimn.exe
- %Program Files%\Outlook Express\oemig50.exe
- %Program Files%\Outlook Express\setup50.exe
- %Program Files%\Outlook Express\wab.exe
(Note: %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.. %Program Files% is the default Program Files folder, usually C:\Program Files.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball\SpaceCadet
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball\SpaceCadet
Table Version = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball\SpaceCadet
Table Exe = "{malware path and file name}.exe.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball\SpaceCadet
Table Name = "Space Cadet"
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball
Last Table Played = "SpaceCadet"
HKEY_CURRENT_USER\Software\Microsoft\
Plus!\Pinball
Table0 = "SpaceCadet"
Dropping Routine
This Trojan drops the following files:
- %System Root%\syst.exe
- temp.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other Details
This Trojan deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
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
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\Plus!\Pinball
- SpaceCadet
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\Plus!\Pinball\SpaceCadet
- Table Version = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Plus!\Pinball\SpaceCadet
- Table Exe = "{malware path and file name}.exe.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Plus!\Pinball\SpaceCadet
- Table Name = "Space Cadet"
- In HKEY_CURRENT_USER\Software\Microsoft\Plus!\Pinball
- Last Table Played = "SpaceCadet"
- In HKEY_CURRENT_USER\Software\Microsoft\Plus!\Pinball
- Table0 = "SpaceCadet"
Step 4
Search and delete these files
- %System Root%\syst.exe
- temp.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADER.QSJ. 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.
- %Desktop%\vcredist_x86.exe
- %Desktop%\WinPcap_4_1_2.exe
- %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
- %Program Files%\Common Files\Microsoft Shared\Speech\sapisvr.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwconn1.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwconn2.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwrmind.exe
- %Program Files%\Internet Explorer\Connection Wizard\icwtutor.exe
- %Program Files%\Internet Explorer\Connection Wizard\inetwiz.exe
- %Program Files%\Internet Explorer\Connection Wizard\isignup.exe
- %Program Files%\Internet Explorer\iedw.exe
- %Program Files%\Messenger\msmsgs.exe
- %Program Files%\Movie Maker\moviemk.exe
- %Program Files%\MSN\MSNCoreFiles\Install\MSN9Components\Digcore.exe
- %Program Files%\MSN\MSNCoreFiles\Install\MSN9Components\Msncli.exe
- %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
- %Program Files%\MSN Gaming Zone\Windows\bckgzm.exe
- %Program Files%\MSN Gaming Zone\Windows\chkrzm.exe
- %Program Files%\MSN Gaming Zone\Windows\hrtzzm.exe
- %Program Files%\MSN Gaming Zone\Windows\Rvsezm.exe
- %Program Files%\MSN Gaming Zone\Windows\shvlzm.exe
- %Program Files%\MSN Gaming Zone\Windows\zClientm.exe
- %Program Files%\NetMeeting\cb32.exe
- %Program Files%\NetMeeting\conf.exe
- %Program Files%\NetMeeting\wb32.exe
- %Program Files%\Outlook Express\msimn.exe
- %Program Files%\Outlook Express\oemig50.exe
- %Program Files%\Outlook Express\setup50.exe
- %Program Files%\Outlook Express\wab.exe
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