TROJ_OTOTI.VWM
RDN/Generic.dx!dmz (McAfee); Trojan.Win32.Pasta.aegh (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Worm/Autoit.BIPF (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
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
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 adds the following registry keys:
HKEY_CURRENT_USER\Software\PPStream\
main
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
HKEY_LOCAL_MACHINE\Software\Microsoft\
Internet Explorer\SearchScopes
HKEY_LOCAL_MACHINE\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
It adds the following registry entries:
HKEY_CURRENT_USER\Software\PPStream\
main
client = "spl001@xp006"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{20D04FE0-3AEA-1069-A2D8-08002B30309D} = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{450D8FBA-AD25-11D0-98A8-0800361B1103} = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{208D2C60-3AEA-1069-A2D7-08002B30309D} = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{871C5380-42A0-1069-A2EA-08002B30309D} = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Default_Page_URL = "http://www.{BLOCKED}5.com/?dq"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
DefaultScope = "{0633EE93-D776-472f-A0FF-E1416B8B2E3A}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
DisplayName = "???"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
URL = "http://ie.{BLOCKED}5.com/?wd={SearchTerms}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
SortIndex = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
FaviconURLFallback = "http://www.{BLOCKED}5.com/favicon.ico"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\SearchScopes
DefaultScope = "{0633EE93-D776-472f-A0FF-E1416B8B2E3A}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
DisplayName = "???"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
URL = "http://ie.{BLOCKED}5.com/?wd={SearchTerms}"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{450D8FBA-AD25-11D0-98A8-0800361B1103}
Removal Message = "@mydocs.dll,-900"
(Note: The default value data of the said registry entry is @mydocs.dll,-900.)
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://www.{BLOCKED}5.com/?xt"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Start Page = "http://www.{BLOCKED}5.com/?xt"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd={SUB_PRD}&clcid={SUB_CLSID}&pver={SUB_PVER}&ar=home.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Default_Page_URL = "http://www.{BLOCKED}5.com/?dq"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{450D8FBA-AD25-11D0-98A8-0800361B1103}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{645FF040-5081-101B-9F08-00AA002F954E}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace
Dropping Routine
This Trojan drops the following files:
- %User Temp%\aut1.tmp
- %User Profile%\kws\kws.ini
(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.. %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
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\PPStream
- main
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- NewStartPanel
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- SearchScopes
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
- {0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer
- SearchScopes
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes
- {0633EE93-D776-472f-A0FF-E1416B8B2E3A}
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\PPStream\main
- client = "spl001@xp006"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
- {20D04FE0-3AEA-1069-A2D8-08002B30309D} = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
- {450D8FBA-AD25-11D0-98A8-0800361B1103} = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
- {208D2C60-3AEA-1069-A2D7-08002B30309D} = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
- {871C5380-42A0-1069-A2EA-08002B30309D} = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Default_Page_URL = "http://www.{BLOCKED}5.com/?dq"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
- DefaultScope = "{0633EE93-D776-472f-A0FF-E1416B8B2E3A}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- DisplayName = "???"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- URL = "http://ie.{BLOCKED}5.com/?wd={SearchTerms}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- SortIndex = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- FaviconURLFallback = "http://www.{BLOCKED}5.com/favicon.ico"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\SearchScopes
- DefaultScope = "{0633EE93-D776-472f-A0FF-E1416B8B2E3A}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- DisplayName = "???"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}
- URL = "http://ie.{BLOCKED}5.com/?wd={SearchTerms}"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{450D8FBA-AD25-11D0-98A8-0800361B1103}
- From: Removal Message = "@mydocs.dll,-900"
To: Removal Message = ""@mydocs.dll,-900""
- From: Removal Message = "@mydocs.dll,-900"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Start Page = "http://www.{BLOCKED}5.com/?xt"
To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""
- From: Start Page = "http://www.{BLOCKED}5.com/?xt"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- From: Start Page = "http://www.{BLOCKED}5.com/?xt"
To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd={SUB_PRD}&clcid={SUB_CLSID}&pver={SUB_PVER}&ar=home""
- From: Start Page = "http://www.{BLOCKED}5.com/?xt"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- From: Default_Page_URL = "http://www.{BLOCKED}5.com/?dq"
To: Default_Page_URL = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""
- From: Default_Page_URL = "http://www.{BLOCKED}5.com/?dq"
Step 5
Search and delete these components
- %User Temp%\aut1.tmp
- %User Profile%\kws\kws.ini
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_OTOTI.VWM. 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 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\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
- {1f4de370-d627-11d1-ba4f-00a0c91eedba}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
- {450D8FBA-AD25-11D0-98A8-0800361B1103}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
- {645FF040-5081-101B-9F08-00AA002F954E}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
- {e17d4fc0-5564-11d1-83f2-00a0c90dc849}
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Desktop
- NameSpace
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