TROJ_BIND32.SMEP
Backdoor:Win32/Poison.E (Microsoft); Downloader (Symantec); Backdoor.Win32.Inject.xfa (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
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
403,456 bytes
EXE
Yes
01 Mar 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%\Adobe
(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
StubPath = "%System%:csentomder.exe"
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\~TX2.tmp
(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Recent File List
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Settings
HKEY_CURRENT_USER\Software\Adobe\
Adobe Acrobat\10.0
HKEY_CURRENT_USER\Software\Adobe\
Adobe Synchronizer\10.0
HKEY_LOCAL_MACHINE\System\Acrobatbrokerserverdispatchercpp789
HKEY_LOCAL_MACHINE\Software\Microsoft\
Active Setup\Installed Components\{DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
HKEY_CURRENT_USER\Software\Adobe\
Acrobat Reader\10.0\Installer\
Migrated
It deletes the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
Dropping Routine
This Trojan drops the following files:
- %System Root%\{malware file name}.bat
- %System%:csentomder.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
Restart in Safe Mode
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_CURRENT_USER\Software
- Local AppWizard-Generated Applications
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- Recent File List
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- Settings
- In HKEY_CURRENT_USER\Software\Adobe\Adobe Acrobat
- 10.0
- In HKEY_CURRENT_USER\Software\Adobe\Adobe Synchronizer
- 10.0
- In HKEY_LOCAL_MACHINE\System
- Acrobatbrokerserverdispatchercpp789
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components
- {DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
- In HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\10.0\Installer
- Migrated
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
- StubPath = "%System%:csentomder.exe"
Step 5
Search and delete these components
- %System Root%\{malware file name}.bat
- %System%:csentomder.exe
Step 6
Search and delete this folder
- %User Temp%\Adobe
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BIND32.SMEP. 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 Temp%\~TX2.tmp
Step 9
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components
- {DEEB6634-94F3-CBE5-CBD2-66E02119AFC4}
Step 10
Scan your computer with your Trend Micro product to delete files detected as TROJ_BIND32.SMEP. 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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