TROJ_FAVADD.SMI
TrojanDownloader:Win32/VB.PX (Microsoft); :Generic.tfr!o (McAfee); Trojan-Dropper.Win32.VB.bbdf, Trojan-Dropper.Win32.VB.bbdf (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.6668712 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/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
192,512 bytes
EXE
01 Oct 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.
Other System Modifications
This Trojan deletes the following files:
- %Temporary Internet Files%\Content.IE5\2TPM8950\vplay[1].htm
(Note: %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hdh
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hdh\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hdh\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.hdh
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hyx
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hyx\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hyx\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.hyx
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hpf
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hpf\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hpf\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.hpf
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
htb
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
htb\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
htb\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.htb
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
h35
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
h35\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
h35\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.h35
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hli
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hli\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
hli\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.hli
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu
{871C5380-42A0-1069-A2EA-08002B30309D} = 1
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{871C5380-42A0-1069-A2EA-08002B30309D} = 1
Dropping Routine
This Trojan drops the following files:
- %Desktop%\Internet Expleror.hdh
- %Desktop%\?????.hyx
- %System Root%\jies.bak.vbs
- %System Root%\vplay.exe
(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
This report is generated via an automated analysis system.
SOLUTION
9.200
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_LOCAL_MACHINE\SOFTWARE\Classes
- hdh
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hdh
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hdh\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .hdh
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- hyx
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hyx
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hyx\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .hyx
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- hpf
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hpf
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hpf\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .hpf
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- htb
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\htb
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\htb\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .htb
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- h35
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\h35
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\h35\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .h35
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- hli
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hli
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hli\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .hli
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- ClassicStartMenu
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- NewStartPanel
To delete the registry key this malware/grayware created:
- Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
- In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes - Still in the left panel, locate and delete the key:
hdh - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hdh - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hdh>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.hdh - Again Still in the left panel, locate and delete the key:
hyx - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hyx - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hyx>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.hyx - Again Still in the left panel, locate and delete the key:
hpf - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hpf - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hpf>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.hpf - Again Still in the left panel, locate and delete the key:
htb - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>htb - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>htb>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.htb - Again Still in the left panel, locate and delete the key:
h35 - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>h35 - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>h35>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.h35 - Again Still in the left panel, locate and delete the key:
hli - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hli - Still in the left panel, locate and delete the key:
DefaultIcon - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>hli>shell>open - Still in the left panel, locate and delete the key:
command - Again Still in the left panel, locate and delete the key:
.hli - In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>HideDesktopIcons - Still in the left panel, locate and delete the key:
ClassicStartMenu - Again Still in the left panel, locate and delete the key:
NewStartPanel
- Close Registry Editor.
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\Windows\CurrentVersion\Explorer\HideDesktopIcons\ClassicStartMenu
- {871C5380-42A0-1069-A2EA-08002B30309D}=1
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
- {871C5380-42A0-1069-A2EA-08002B30309D}=1
Step 4
Search and delete these files
- %Desktop%\Internet Expleror.hdh
- %Desktop%\?????.hyx
- %System Root%\jies.bak.vbs
- %System Root%\vplay.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_FAVADD.SMI. 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.
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