TROJ_AGENT_007949.TOMB

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 disables Task Manager, Registry Editor, and Folder Options.

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%\Internet Explorer.lnk
• %Desktop%\ÌÔ±¦Íø.lnk
• %Desktop%\°ÁÓÎä¯ÀÀÆ÷2.lnk
• %Desktop%\360°²È«ÎÀÊ¿.lnk
• %Desktop%\360Èí¼þ¹Ü¼Ò.lnk
• %Desktop%\360ɱ¶¾.lnk
• %Desktop%\ÌÔ±¦É̳Ç.lnk
• %Desktop%\ÈðÐÇɱ¶¾Èí¼þ.lnk
• %Desktop%\ÐÞ¸´ÈðÐÇÈí¼þ.lnk
• %Desktop%\Õ˺ű£ÏÕ¹ñ.lnk
• %Start Menu%\Internet Explorer.lnk
• %Start Menu%\ÌÔ±¦Íø.lnk
• %Start Menu%\°ÁÓÎä¯ÀÀÆ÷2.lnk
• %Start Menu%\Programs\Internet Explorer.lnk
• %Start Menu%\Programs\ÌÔ±¦Íø.lnk
• %Start Menu%\Programs\°ÁÓÎä¯ÀÀÆ÷2.lnk
• %User Profile%\Quick Launch\Internet Explorer.lnk
• %User Profile%\Quick Launch\ÌÔ±¦Íø.lnk
• %User Profile%\Quick Launch\°ÁÓÎä¯ÀÀÆ÷2.lnk
• %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
• %User Profile%\Quick Launch\ÈðÐÇɱ¶¾Èí¼þ.lnk
• %User Profile%\×ÀÃæ\Internet Explorer.lnk
• %User Profile%\×ÀÃæ\360°²È«ä¯ÀÀÆ÷.lnk
• %User Profile%\×ÀÃæ\ÌÔ±¦É̳Ç.lnk

(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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_CLASSES_ROOT\PlayFlashDXA

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
DefaultIcon

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
Shell\ÊôÐÔ(&R)\Command

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
Shell\ɾ³ý(&D)\Command

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
Shell\ÖØÃüÃû(&M)\Command

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
Shell\Open(&O)\Command

HKEY_CLASSES_ROOT\CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\
ShellFolder

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PlayFlashDXA
1 = "1333c5"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PlayFlashDXA
cdafile2 = "29d31"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PlayFlashDXA
9 = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PlayFlashDXA
9 = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C1A8AF25-1257-101B-8FB0-0020AF039CA8}\ShellFolder
Attributes = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Window Title = "Microsoft Internet Explorer"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Window Title = "Microsoft Internet Explorer"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
SuperHidden = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://www.{BLOCKED}2.com/?yya"

(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}2.com/?yya"

(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.)

It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoInternetIcon = "0"

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\Hidden\
SHOWALL

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\HideFileExt

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\TypedUrls

Dropping Routine

This Trojan drops the following files:

• %Program Files%\Common Files\dao.ico
• %Start Menu%\Internet Explorer.url
• %Start Menu%\Programs\Internet Explorer.url
• %User Profile%\Quick Launch\Internet Explorer.url
• %Favorites%\ÌÔ±¦É̳Ç.url
• %Favorites%\Ãâ·Ñ¿´µçÓ°.url

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.)

This report is generated via an automated analysis system.