Sophos

Troj/Qlow-F

Aliases
  • Trojan.Dropper.Purityscan.F
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Protection available since 14 December 2004 06:48:30 (GMT)
Detected by All Sophos products
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Action

Please follow the instructions for removing Trojans.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\

and remove any reference to any file you deleted.

Close the registry editor.

More Information

Troj/Qlow-F is a Trojan for the Windows platform that modifies internet security settings by changing security settings for the Internet Zone.

Troj/Qlow-F may arrive as a file called Regtlib.exe that when executed deletes the registry entries:

HKLM\ Software\Microsoft\Windows\CurrentVersion\Run
Norton updater

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
REGTLIB

Troj/Qlow-F creates and executes the installer.exe file in the Temp folder and sets the following registry entry:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
REGTLIB
REGTLIB.exe

The Trojan creates and executes the mt-uninstaller.exe file in the current folder. Installer.exe is detected as a component of Troj/Agent-DN.

Mt-uninstaller.exe is a component of the Media tickets adware

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