Virus:TR/Agent.YU.2
Date discovered:12/09/2006
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:137.216 Bytes
MD5 checksum:c6dad9eb2cf8de75a481122094b303e3
VDF version:6.35.01.215
IVDF version:6.35.01.219 - Wednesday, September 13, 2006

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan.Win32.Agent.yu
   •  TrendMicro: TROJ_AGENT.ETQ
   •  F-Secure: Trojan.Win32.Agent.yu
   •  Eset: Win32/Agent.YU


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Lowers security settings
   • Registry modification


Right after execution the following information is displayed:


 Files It copies itself to the following locations:
   • %WINDIR%\ime\imkr6_1\dicts\SVCHOST.exe
   • %WINDIR%\WinSxS\Manifests\SMSS.exe

 Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "ALG"="%WINDIR%\ime\imkr6_1\dicts\SVCHOST.exe"
   • "SERVICES"="%WINDIR%\WinSxS\Manifests\SMSS.exe"



The following registry key is added:

– [HKCU\Software\Obsidium]


The following registry keys are changed:

Various Explorer settings:
– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer]
   Old value:
   • "NoStartMenuMFUprogramsList"=%user defined settings%
   • "NoStartMenuPinnedList"=%user defined settings%
   • "NoStartMenuSubFolders"=%user defined settings%
   • "NoCommonGroups"=%user defined settings%
   • "NoSMMyPictures"=%user defined settings%
   • "NoStartMenuMyMusic"=%user defined settings%
   • "NoSMMyDocs"=%user defined settings%
   • "NoDesktop"=%user defined settings%
   • "NoActiveDesktop"=%user defined settings%
   • "NoViewOnDrive"=%user defined settings%
   New value:
   • "NoStartMenuMFUprogramsList"=dword:00000001
   • "NoStartMenuPinnedList"=dword:00000001
   • "NoStartMenuSubFolders"=dword:00000001
   • "NoCommonGroups"=dword:00000001
   • "NoSMMyPictures"=dword:00000001
   • "NoStartMenuMyMusic"=dword:00000001
   • "NoSMMyDocs"=dword:00000001
   • "NoDesktop"=dword:00000001
   • "NoActiveDesktop"=dword:00000001
   • "NoViewOnDrive"=dword:00000001

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer]
   Old value:
   • "NoViewContextMenu"=%user defined settings%
   New value:
   • "NoViewContextMenu"=dword:00000001

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Old value:
   • "Start_ShowRun"=%user defined settings%
   New value:
   • "Start_ShowRun"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer]
   Old value:
   • "NoViewContextMenu"=%user defined settings%
   New value:
   • "NoViewContextMenu"=dword:00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Old value:
   • "Start_ShowRun"=%user defined settings%
   New value:
   • "Start_ShowRun"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   Old value:
   • "NoStartMenuPinnedList"=%user defined settings%
   • "NoStartMenuMFUprogramsList"=%user defined settings%
   • "NoStartMenuSubFolders"=%user defined settings%
   • "NoCommonGroups"=%user defined settings%
   • "NoSMMyPictures"=%user defined settings%
   • "NoStartMenuMyMusic"=%user defined settings%
   • "NoSMMyDocs"=%user defined settings%
   • "NoDesktop"=%user defined settings%
   • "NoActiveDesktop"=%user defined settings%
   • "NoViewOnDrive"=%user defined settings%
   • "NoControlPanel"=%user defined settings%
   • "NoDrives"=%user defined settings%
   • "NoRun"=%user defined settings%
   • "NoFind"=%user defined settings%
   • "NoFavoritesMenu"=%user defined settings%
   • "NoRecentDocsMenu"=%user defined settings%
   • "NoLogOff"=%user defined settings%
   • "NoClose"=%user defined settings%
   • "NoSaveSettings"=%user defined settings%
   • "NoUserNameInStartMenu"=%user defined settings%
   • "NoToolbarCustomize"=%user defined settings%
   • "NoThemesTab"=%user defined settings%
   • "NoSMHelp"=%user defined settings%
   • "NoPrinterTabs"=%user defined settings%
   • "NoPrinters"=%user defined settings%
   • "NoNetHood"=%user defined settings%
   • "NoManageMyComputerVerb"=%user defined settings%
   New value:
   • "NoStartMenuPinnedList"=dword:00000001
   • "NoStartMenuMFUprogramsList"=dword:00000001
   • "NoStartMenuSubFolders"=dword:00000001
   • "NoCommonGroups"=dword:00000001
   • "NoSMMyPictures"=dword:00000001
   • "NoStartMenuMyMusic"=dword:00000001
   • "NoSMMyDocs"=dword:00000001
   • "NoDesktop"=dword:00000001
   • "NoActiveDesktop"=dword:00000001
   • "NoViewOnDrive"=dword:00000001
   • "NoControlPanel"=dword:00000001
   • "NoDrives"=dword:00000414
   • "NoRun"=dword:00000001
   • "NoFind"=dword:00000001
   • "NoFavoritesMenu"=dword:00000001
   • "NoRecentDocsMenu"=dword:00000001
   • "NoLogOff"=dword:00000001
   • "NoClose"=dword:00000001
   • "NoSaveSettings"=dword:00000001
   • "NoUserNameInStartMenu"=dword:00000001
   • "NoToolbarCustomize"=dword:00000001
   • "NoThemesTab"=dword:00000001
   • "NoSMHelp"=dword:00000001
   • "NoPrinterTabs"=dword:00000001
   • "NoPrinters"=dword:00000001
   • "NoNetHood"=dword:00000001
   • "NoManageMyComputerVerb"=dword:00000001

Internet Explorer's start page:
– [HKLM\SOFTWARE\Microsoft\Internet Explorer\Main]
   Old value:
   • "Start Page"=%user defined settings%
   • "Window title"=%user defined settings%
   New value:
   • "Start Page"="http://poetry.rotten.com/uday/index18.html"
   • "Window title"=":::::::::::::::::: ÌÎß ÏÈÇÄÀ ÑÃÍÈËÀ È ÕÓÉ ÏÐÎÒÓÕ ::::::::::::::::::"

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   Old value:
   • "Start Page"=%user defined settings%
   • "Window title"=%user defined settings%
   • "NoControlPanel"=%user defined settings%
   • "NoDrives"=%user defined settings%
   • "NoRun"=%user defined settings%
   • "NoFind"=%user defined settings%
   • "NoFavoritesMenu"=%user defined settings%
   • "NoRecentDocsMenu"=%user defined settings%
   • "NoLogOff"=%user defined settings%
   • "NoClose"=%user defined settings%
   • "NoSaveSettings"=%user defined settings%
   • "NoUserNameInStartMenu"=%user defined settings%
   • "NoToolbarCustomize"=%user defined settings%
   • "NoThemesTab"=%user defined settings%
   • "NoSMHelp"=%user defined settings%
   • "NoPrinterTabs"=%user defined settings%
   • "NoPrinters"=%user defined settings%
   • "NoNetHood"=%user defined settings%
   • "NoManageMyComputerVerb"=%user defined settings%
   New value:
   • "Start Page"="http://poetry.rotten.com/uday/index18.html"
   • "Window title"=":::::::::::::::::: ÌÎß ÏÈÇÄÀ ÑÃÍÈËÀ È ÕÓÉ ÏÐÎÒÓÕ ::::::::::::::::::"
   • "NoControlPanel"=dword:00000001
   • "NoDrives"=dword:00000414
   • "NoRun"=dword:00000001
   • "NoFind"=dword:00000001
   • "NoFavoritesMenu"=dword:00000001
   • "NoRecentDocsMenu"=dword:00000001
   • "NoLogOff"=dword:00000001
   • "NoClose"=dword:00000001
   • "NoSaveSettings"=dword:00000001
   • "NoUserNameInStartMenu"=dword:00000001
   • "NoToolbarCustomize"=dword:00000001
   • "NoThemesTab"=dword:00000001
   • "NoSMHelp"=dword:00000001
   • "NoPrinterTabs"=dword:00000001
   • "NoPrinters"=dword:00000001
   • "NoNetHood"=dword:00000001
   • "NoManageMyComputerVerb"=dword:00000001

Disable Regedit and Task Manager:
– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
   Old value:
   • "DisableTaskMgr"=%user defined settings%
   • "DisableRegistryTools"=%user defined settings%
   New value:
   • "DisableTaskMgr"=dword:00000001
   • "DisableRegistryTools"=dword:00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   Old value:
   • "DisableTaskMgr"=%user defined settings%
   • "NoDispCPL"=%user defined settings%
   • "DisableRegistryTools"=%user defined settings%
   New value:
   • "DisableTaskMgr"=dword:00000001
   • "NoDispCPL"=dword:00000001
   • "DisableRegistryTools"=dword:00000001

Lower security settings from Internet Explorer:
– [HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions]
   Old value:
   • "NoBrowserClose"=%user defined settings%
   • "NoNavButtons"=%user defined settings%
   • "NoSelectDownloadDir"=%user defined settings%
   • "NoBrowserContextMenu"=%user defined settings%
   • "NoBrowserOptions"=%user defined settings%
   New value:
   • "NoBrowserClose"=dword:00000001
   • "NoNavButtons"=dword:00000001
   • "NoSelectDownloadDir"=dword:00000001
   • "NoBrowserContextMenu"=dword:00000001
   • "NoBrowserOptions"=dword:00000001

Time format:
– [HKCU\Control Panel\International]
   Old value:
   • "sTimeFormat"=%user defined settings%
   New value:
   • "sTimeFormat"="ÁËßÄÜ"

– [HKCU\Control Panel\Desktop]
   Old value:
   • "MenuShowDelay"=%user defined settings%
   • "WallpaperOriginX"=%user defined settings%
   • "WallpaperOriginY"=%user defined settings%
   New value:
   • "MenuShowDelay"="9999"
   • "WallpaperOriginX"="210"
   • "WallpaperOriginY"="187"

– [HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
   New value:
   • "DiskSpaceThreshold"=dword:00000099

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • "LegalNoticeCaption"=%user defined settings%
   • "LegalNoticeText"=%user defined settings%
   New value:
   • "LegalNoticeCaption"="DANGER"
   • "LegalNoticeText"="Äëÿ òîãî ÷òîáû âîññòàíîâèòü íîðìàëüíóþ ðàáîòó ñâîåãî êîìïüþòåðà íå ïîòåðÿâ ÂÑÞ èíôîðìàöèþ! È ñ ýêîíîìèâ äåíüãè, ïðèøëè ìíå íà e-mail nice@privat.ms êîä ïîïîëíåíèÿ ñ÷åòà êèåâñòàð íà 25 ãðèâåíü.  îòâåò â òå÷åíèå äâåíàäöàòè ÷àñîâ íà ñâîé e-mail òû ïîëó÷èøü ôàèë äëÿ óäàëåíèÿ ýòîé ïðîãðàììû."

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Winlogon]
   Old value:
   • "LegalNoticeCaption"=%user defined settings%
   • "LegalNoticeText"=%user defined settings%
   New value:
   • "LegalNoticeCaption"="DANGER"
   • "LegalNoticeText"="Äëÿ òîãî ÷òîáû âîññòàíîâèòü íîðìàëüíóþ ðàáîòó ñâîåãî êîìïüþòåðà íå ïîòåðÿâ ÂÑÞ èíôîðìàöèþ! È ñ ýêîíîìèâ äåíüãè, ïðèøëè ìíå íà e-mail nice@privat.ms êîä ïîïîëíåíèÿ ñ÷åòà êèåâñòàð íà 25 ãðèâåíü.  îòâåò â òå÷åíèå äâåíàäöàòè ÷àñîâ íà ñâîé e-mail òû ïîëó÷èøü ôàèë äëÿ óäàëåíèÿ ýòîé ïðîãðàììû."

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore]
   Old value:
   • "DisableSR"=%user defined settings%
   • "RPLifeInterval"=%user defined settings%
   New value:
   • "DisableSR"=dword:00000001
   • "RPLifeInterval"=dword:00000001

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Uninstall]
   Old value:
   • "NoAddRemovePrograms"=%user defined settings%
   New value:
   • "NoAddRemovePrograms"=dword:00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Uninstall]
   Old value:
   • "NoAddRemovePrograms"=%user defined settings%
   New value:
   • "NoAddRemovePrograms"=dword:00000001

 Process termination  List of services that are disabled:
   • System Restore
   • Task Manager

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Adriana Popa on Friday, October 27, 2006
Description updated by Adriana Popa on Monday, October 30, 2006

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