TROJ_PAM_00000300C8.T3
Trojan:Win32/Sisproc (Microsoft); Trojan.ADH.2 (Symantec); ARC:EmbeddedEXE, [data0000]:Trojan-Downloader.Win32.Agent.tixi (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Gen:Variant.Graftor.7559 (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
213,057 bytes
EXE
No
20 Jul 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:
- %User Temp%\~sfx003C9D283B
(Note: %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.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}\TypeLib
HKEY_CLASSES_ROOT\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}\InprocServer32
HKEY_CLASSES_ROOT\WelchGIFviewer.ucAniGIF
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
ProgID = "WelchGIFviewer.ucAniGIF"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
ToolboxBitmap32 = "%User Temp%\~sfx003C9D283B\GIFviewer.ocx, 30000"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
MiscStatus = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
MiscStatus\1 = "147857"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
TypeLib = "{3383D1F1-029B-43B1-8733-289322EA85FA}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
VERSION = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
WelchGIFviewer.ucAniGIF
Clsid = "{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}
ProxyStubClsid = "{00020424-0000-0000-C000-000000000046}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{08D24088-19F0-490A-93C8-84B68381D155}
ProxyStubClsid32 = "{00020424-0000-0000-C000-000000000046}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
ProxyStubClsid = "{00020420-0000-0000-C000-000000000046}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
ProxyStubClsid32 = "{00020420-0000-0000-C000-000000000046}"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
Name = "iexplore.exe"
(Note: The default value data of the said registry entry is iexplore.exe.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
ID = "4117b81"
(Note: The default value data of the said registry entry is 41107b81.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\~sfx003C9D283B\C22.dll
- %User Temp%\~sfx003C9D283B\C22dll.exe
- %User Temp%\~sfx003C9D283B\GIFviewer.ocx
(Note: %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.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
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\TypeLib
- {3383D1F1-029B-43B1-8733-289322EA85FA}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{3383D1F1-029B-43B1-8733-289322EA85FA}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {08D24088-19F0-490A-93C8-84B68381D155}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {C40DE621-5879-4553-882A-EA3F1109E290}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
- TypeLib
- In HKEY_CLASSES_ROOT\CLSID
- {7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- InprocServer32
- In HKEY_CLASSES_ROOT
- WelchGIFviewer.ucAniGIF
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_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- ProgID = "WelchGIFviewer.ucAniGIF"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- ToolboxBitmap32 = "%User Temp%\~sfx003C9D283B\GIFviewer.ocx, 30000"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- MiscStatus = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- MiscStatus\1 = "147857"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- TypeLib = "{3383D1F1-029B-43B1-8733-289322EA85FA}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}
- VERSION = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WelchGIFviewer.ucAniGIF
- Clsid = "{7D518439-D9BE-4A7E-A76B-2FB2A03369F0}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}
- ProxyStubClsid = "{00020424-0000-0000-C000-000000000046}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{08D24088-19F0-490A-93C8-84B68381D155}
- ProxyStubClsid32 = "{00020424-0000-0000-C000-000000000046}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
- ProxyStubClsid = "{00020420-0000-0000-C000-000000000046}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C40DE621-5879-4553-882A-EA3F1109E290}
- ProxyStubClsid32 = "{00020420-0000-0000-C000-000000000046}"
Step 4
Restore this modified 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_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
- From: Name = "iexplore.exe"
To: Name = ""iexplore.exe""
- From: Name = "iexplore.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
- From: ID = "4117b81"
To: ID = ""41107b81""
- From: ID = "4117b81"
Step 5
Search and delete these files
- %User Temp%\~sfx003C9D283B\C22.dll
- %User Temp%\~sfx003C9D283B\C22dll.exe
- %User Temp%\~sfx003C9D283B\GIFviewer.ocx
Step 6
Search and delete this folder
- %User Temp%\~sfx003C9D283B
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_PAM_00000300C8.T3. 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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