TROJ_CLICKER.CGM
Worm:Win32/Bolkc.A (Microsoft); Trojan Horse (Symantec); Trojan-Clicker.Win32.Agent.gza (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.4549043 (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
299,078 bytes
EXE
Yes
23 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 drops the following copies of itself into the affected system:
- %System%\Conf\svchost.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It creates the following folders:
- %System%\Conf
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
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
SVCHOST.EXE = "%System%\Conf\svchost.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput
hkey_current_user\software\microsoft\
directinput\{malware file name}4995252b00049046
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput\MostRecentApplication
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
It adds the following registry entries:
hkey_current_user\software\microsoft\
directinput\{malware file name}4995252b00049046
Name = "{malware file name}"
hkey_current_user\software\microsoft\
directinput\{malware file name}4995252b00049046
UsesMapper = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput\MostRecentApplication
Name = "{malware file name}"
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput\MostRecentApplication
Id = "{malware file name}4995252b00049046"
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput\MostRecentApplication
Version = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
DirectInput\MostRecentApplication
MostRecentStart = "{random values}"
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"
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
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\Microsoft
- DirectInput
- In hkey_current_user\software\microsoft\directinput
- {malware file name}4995252b00049046
- In HKEY_CURRENT_USER\Software\Microsoft\DirectInput
- MostRecentApplication
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- CpMRU
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
- SVCHOST.EXE = "%System%\Conf\svchost.exe"
- In hkey_current_user\software\microsoft\directinput\{malware file name}4995252b00049046
- Name = "{malware file name}"
- In hkey_current_user\software\microsoft\directinput\{malware file name}4995252b00049046
- UsesMapper = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\DirectInput\MostRecentApplication
- Name = "{malware file name}"
- In HKEY_CURRENT_USER\Software\Microsoft\DirectInput\MostRecentApplication
- Id = "{malware file name}4995252b00049046"
- In HKEY_CURRENT_USER\Software\Microsoft\DirectInput\MostRecentApplication
- Version = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\DirectInput\MostRecentApplication
- MostRecentStart = "{random values}"
- 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"
Step 5
Search and delete this folder
- %System%\Conf
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CLICKER.CGM. 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.