TROJ_FORPI.SMIA
TrojanDownloader:Win32/Forpi.A (Microsoft); Trojan.Win32.Generic!BT (Sunbelt); Trojan:W32/Agent.DSUL (FSecure)
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.
TECHNICAL DETAILS
1,842,176 bytes
EXE
No
25 Apr 2012
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.
Installation
This Trojan creates the following folders:
- %Program Files%\D43A6CCC
- %Program Files%\winzip1
- %Program Files%\winzip1\Internat Explorer
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô
- %Program Files%\winzip1\ÍæСÓÎÏ·
- %User Temp%\is-3D71T.tmp
- %User Temp%\is-FSJ67.tmp
- %User Temp%\is-FSJ67.tmp\_isetup
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This Trojan registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\explorer\
Browser Helper Objects\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}
Other System Modifications
This Trojan deletes the following files:
- %User Profile%\³ÌÐò\Internet Explorer.lnk
- %Windows%\fonts\msgothic.ttf
- %Windows%\fonts\msuigoth.ttf
- %Windows%\fonts\MSMINCHO.TTF
- %Windows%\fonts\Gulim.ttf
- %Windows%\fonts\Gulimche.ttf
- %Windows%\fonts\Dotum.ttf
- %Windows%\fonts\Batang.ttf
- %Windows%\fonts\Gungsuh.ttf
- %Windows%\fonts\Simsun.ttf
- %Windows%\fonts\nsimsun.ttf
- %Windows%\fonts\MingLiU.ttf
- %Windows%\fonts\pmingliu.ttf
- %System%\SET2.tmp
- %System%\kbd101b.dll
- %System%\SET4.tmp
- %System%\kbd101c.dll
- %System%\SET6.tmp
- %System%\kbd103.dll
- %System%\SET8.tmp
- %System%\kbd106.dll
- %System%\SETA.tmp
- %System%\kbdjpn.dll
- %System%\SETC.tmp
- %System%\kbdkor.dll
(Note: %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.. %Windows% is the Windows folder, which is usually C:\Windows.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
It adds the following registry keys:
HKEY_CLASSES_ROOT\.oy
HKEY_CLASSES_ROOT\oyfile
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
oyfile\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
oyfile\shell
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
oyfile\shell\open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
oyfile\shell\open\
command
HKEY_CLASSES_ROOT\.ot
HKEY_CLASSES_ROOT\otfile
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
otfile\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
otfile\shell
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
otfile\shell\open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
otfile\shell\open\
command
HKEY_CLASSES_ROOT\.og
HKEY_CLASSES_ROOT\ogfile
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
ogfile\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
ogfile\shell
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
ogfile\shell\open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
ogfile\shell\open\
command
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
HKEY_CLASSES_ROOT\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}
HKEY_CLASSES_ROOT\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}\
InprocServer32
HKEY_CLASSES_ROOT\javatm.Java (TM)
HKEY_CLASSES_ROOT\javatm.Java (TM)\Clsid
HKEY_CLASSES_ROOT\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}\
ProgID
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Enable = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Size = "a"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
InitHits = "64"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Factor = "14"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}\InprocServer32
ThreadingModel = "Apartment"
Dropping Routine
This Trojan drops the following files:
- %System Root%\1C5C9765.log
- %Program Files%\D43A6CCC\9C1B8D4E.exe
- %Program Files%\D43A6CCC\TheWorld.exe
- %Program Files%\D43A6CCC\Loader_forqd318.exe
- %Program Files%\winzip1\Internat Explorer\desktop.ini
- %Program Files%\winzip1\Internat Explorer\target.lnk
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô\desktop.ini
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô\target.lnk
- %Program Files%\winzip1\ÍæСÓÎÏ·\desktop.ini
- %Program Files%\winzip1\ÍæСÓÎÏ·\target.lnk
- %User Profile%\×ÀÃæ\Internat Explorer.oy
- %User Profile%\×ÀÃæ\ÌÔ±¦ÌØÂô.ot
- %User Profile%\×ÀÃæ\ÍæСÓÎÏ·.og
- %Favorites%\Á´½Ó\ºÃÍæСÓÎÏ·.html
- %Favorites%\Á´½Ó\ÉÏÍøÖ·µ¼º½.html
- %Favorites%\Á´½Ó\ÔÚÌÔ±¦¹ºÎï.html
- %Windows%\javatm.dll
- %System%\SET1.tmp
- %System%\SET3.tmp
- %System%\SET5.tmp
- %System%\SET7.tmp
- %System%\SET9.tmp
- %System%\SETB.tmp
- %User Temp%\is-3D71T.tmp\TheWorld.tmp
- %User Temp%\is-FSJ67.tmp\_isetup\_RegDLL.tmp
- %User Temp%\is-FSJ67.tmp\_isetup\_shfoldr.dll
- %System%\SET2.tmp
- %System%\SET4.tmp
- %System%\SET6.tmp
- %System%\SET8.tmp
- %System%\SETA.tmp
- %System%\SETC.tmp
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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.. %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Favorites on Windows Vista and 7.. %Windows% is the Windows folder, which is usually C:\Windows.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
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
Close all opened browser windows
Step 3
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_CLASSES_ROOT
- .oy
- In HKEY_CLASSES_ROOT
- oyfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\oyfile
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\oyfile
- shell
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\oyfile\shell
- open
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\oyfile\shell\open
- command
- In HKEY_CLASSES_ROOT
- .ot
- In HKEY_CLASSES_ROOT
- otfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\otfile
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\otfile
- shell
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\otfile\shell
- open
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\otfile\shell\open
- command
- In HKEY_CLASSES_ROOT
- .og
- In HKEY_CLASSES_ROOT
- ogfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ogfile
- DefaultIcon
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ogfile
- shell
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ogfile\shell
- open
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ogfile\shell\open
- command
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- NewStartPanel
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- CpMRU
- In HKEY_CLASSES_ROOT\CLSID
- {1A8C77E9-3815-4E2A-A218-D2D4CC72104F}
- In HKEY_CLASSES_ROOT\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}
- InprocServer32
- In HKEY_CLASSES_ROOT
- javatm.Java (TM)
- In HKEY_CLASSES_ROOT\javatm.Java (TM)
- Clsid
- In HKEY_CLASSES_ROOT\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}
- ProgID
Step 4
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\Internet Explorer\International\CpMRU
- Enable = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- Size = "a"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- InitHits = "64"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- Factor = "14"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- W2KLpk = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- W2KLpk = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1A8C77E9-3815-4E2A-A218-D2D4CC72104F}\InprocServer32
- ThreadingModel = "Apartment"
Step 5
Search and delete these components
- %System Root%\1C5C9765.log
- %Program Files%\D43A6CCC\9C1B8D4E.exe
- %Program Files%\D43A6CCC\TheWorld.exe
- %Program Files%\D43A6CCC\Loader_forqd318.exe
- %Program Files%\winzip1\Internat Explorer\desktop.ini
- %Program Files%\winzip1\Internat Explorer\target.lnk
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô\desktop.ini
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô\target.lnk
- %Program Files%\winzip1\ÍæСÓÎÏ·\desktop.ini
- %Program Files%\winzip1\ÍæСÓÎÏ·\target.lnk
- %User Profile%\×ÀÃæ\Internat Explorer.oy
- %User Profile%\×ÀÃæ\ÌÔ±¦ÌØÂô.ot
- %User Profile%\×ÀÃæ\ÍæСÓÎÏ·.og
- %Favorites%\Á´½Ó\ºÃÍæСÓÎÏ·.html
- %Favorites%\Á´½Ó\ÉÏÍøÖ·µ¼º½.html
- %Favorites%\Á´½Ó\ÔÚÌÔ±¦¹ºÎï.html
- %Windows%\javatm.dll
- %System%\SET1.tmp
- %System%\SET3.tmp
- %System%\SET5.tmp
- %System%\SET7.tmp
- %System%\SET9.tmp
- %System%\SETB.tmp
- %User Temp%\is-3D71T.tmp\TheWorld.tmp
- %User Temp%\is-FSJ67.tmp\_isetup\_RegDLL.tmp
- %User Temp%\is-FSJ67.tmp\_isetup\_shfoldr.dll
- %System%\SET2.tmp
- %System%\SET4.tmp
- %System%\SET6.tmp
- %System%\SET8.tmp
- %System%\SETA.tmp
- %System%\SETC.tmp
Step 6
Search and delete these folders
- %Program Files%\D43A6CCC
- %Program Files%\winzip1
- %Program Files%\winzip1\Internat Explorer
- %Program Files%\winzip1\ÌÔ±¦ÌØÂô
- %Program Files%\winzip1\ÍæСÓÎÏ·
- %User Temp%\is-3D71T.tmp
- %User Temp%\is-FSJ67.tmp
- %User Temp%\is-FSJ67.tmp\_isetup
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_FORPI.SMIA. 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 8
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.
- %User Profile%\³ÌÐò\Internet Explorer.lnk
- %Windows%\fonts\msgothic.ttf
- %Windows%\fonts\msuigoth.ttf
- %Windows%\fonts\MSMINCHO.TTF
- %Windows%\fonts\Gulim.ttf
- %Windows%\fonts\Gulimche.ttf
- %Windows%\fonts\Dotum.ttf
- %Windows%\fonts\Batang.ttf
- %Windows%\fonts\Gungsuh.ttf
- %Windows%\fonts\Simsun.ttf
- %Windows%\fonts\nsimsun.ttf
- %Windows%\fonts\MingLiU.ttf
- %Windows%\fonts\pmingliu.ttf
- %System%\SET2.tmp
- %System%\kbd101b.dll
- %System%\SET4.tmp
- %System%\kbd101c.dll
- %System%\SET6.tmp
- %System%\kbd103.dll
- %System%\SET8.tmp
- %System%\kbd106.dll
- %System%\SETA.tmp
- %System%\kbdjpn.dll
- %System%\SETC.tmp
- %System%\kbdkor.dll
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