TROJ_CLICKER.YWQ
Trojan:Win32/Dynamer!ac (Microsoft); RDN/Generic.dx!dbd (McAfee); Trojan-Clicker.Win32.SearchEngine.v (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Clicker.BFVL (AVG)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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.
It does not have any propagation routine.
It does not have any backdoor routine.
It does not drop any other file.
It does not have any downloading capability.
It does not have any information-stealing capability.
TECHNICAL DETAILS
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.
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Internet Explorer\Recovery
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Recovery\Active
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
TabProcGrowth = "0"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Internet Explorer\Recovery
NoReopenLastSession = "1"
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Dropping Routine
This Trojan does not drop any other file.
Download Routine
This Trojan does not have any downloading capability.
Information Theft
This Trojan does not have any information-stealing capability.
SOLUTION
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
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\Policies\Microsoft\Internet Explorer
- Recovery
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Recovery
- Active
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_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- TabProcGrowth = "0"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Recovery
- NoReopenLastSession = "1"
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_CLICKER.YWQ. 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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