TROJ_KOLAB.SMUJ1
Worm:Win32/Ainslot.A (Microsoft); Generic.dx!bdtn (McAfee); Trojan.Gen (Symantec); Net-Worm.Win32.Kolab.absq (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse VB.AGZF (AVG)
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
347,328 bytes
EXE
Yes
19 Feb 2013
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.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
dq. = "%User Temp%\wind3.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
dq. = "%User Temp%\wind3.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
StubPath = "%User Temp%\wind3.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
StubPath = "%User Temp%\wind3.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
INSTALL\DATE
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
dq. = "%User Temp%\wind3.exe"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
XW3QYLU334 = "bot"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
INSTALL\DATE
XW3QYLU334 = "January 23, 2013"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%System Root%\\{malware file name}.exe = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%User Temp%\wind3.exe = "%User Temp%\wind3.exe:*:Enabled:Windows Messanger"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\data.dat
(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.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://bss-crypt.{BLOCKED}p.info/MSWINSCK.OCX
This report is generated via an automated analysis system.
SOLUTION
9.300
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer
- run
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup\Installed Components
- {FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID
- ID
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\INSTALL
- DATE
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\Windows\CurrentVersion\Run
- dq. = "%User Temp%\wind3.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- dq. = "%User Temp%\wind3.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
- StubPath = "%User Temp%\wind3.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components\{FAE65B8A-9AEE-A5FF-A12E-6DA5BBD9CECE}
- StubPath = "%User Temp%\wind3.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run
- dq. = "%User Temp%\wind3.exe"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID\ID
- XW3QYLU334 = "bot"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\INSTALL\DATE
- XW3QYLU334 = "January 23, 2013"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DoNotAllowExceptions = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %System Root%\{malware file name}.exe = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %User Temp%\wind3.exe = "%User Temp%\wind3.exe:*:Enabled:Windows Messanger"
Step 5
Search and delete this file
- %User Temp%\data.dat
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_KOLAB.SMUJ1. 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.
Did this description help? Tell us how we did.