Content
QHosts-18
- Type
- Trojan
- SubType
- Win32
- Discovery Date
- 10/06/2004
- Length
- 5,632 bytes
- Minimum DAT
- 4397 (10/06/2004)
- Updated DAT
- 5535 (02/24/2009)
- Minimum Engine
- 5.1.00
- Description Added
- 10/06/2004
- Description Modified
- 10/07/2004 4:34 PM (PT)
Risk Assessment
- Corporate User
- Low-Profiled
- Home User
- Low-Profiled
Tab Navigation
Characteristics
-- Update October 7th, 2004 --
The risk assessment of this threat has been updated to Low-Profiled due to media attention at:
http://www.pcworld.com/news/article/0,aid,118098,00.asp
--
This trojan overwrites the local HOSTS file (such as c:\windows\system32\drivers\etc\hosts) to prevent the local system from accessing domain names. It also attempts to connect to a remote website, to download and automatically execute several files on the infected machine.
When run, the trojan overwrites the host file to point several adware and porn sites to 127.0.0.3
It attempts to download files and save them using the following filenames:
- mstasks1.exe
- toolbar.exe
- dktime.exe
- dk.exe
- dk32.exe
- test
- sexxx.exe
This trojan may also try to terminate the following running processes:
- lpt.exe
- ir.exe
- intron.exe
- intronet.exe
- twink64.exe
- usb.exe
- teur.exe
- host32.exe
- sidefind.exe
- alchem.exe
- powerscan.exe
- bdl74125.exe
- Installer2.exe
- ttgkirnl.exe
- bargains.exe
- WinClt.exe
- Winad.exe
- istsvc.exe
- actalert.exe
- optimize.exe
- iinstall.exe
- fnnmqi.exe
- exdl.exe
- printer.exe
- printer32.exe
- ykyrtws.exe
- loadclean.exe
- telnet.exe
The trojan may attempt to delete the following files
- host32.exe
- telnet.exe.tmp
- mouse.exe
- com.exe
- fnnmqi.exe
- exdl.exe
- exe2bin.exe
- exul.exe
- fastopen.exe
- mscdexnt.exe
- printer.exe
- printer32.exe
- ykyrtws.exe
- lpt.exe
- ir.exe
- intron.exe
- intronet.exe
- twink64.exe
- usb.exe
- alchem.exe
- adp8027_ISEARCHTECH5.exe
- preInsTT.exe
- preInsln.exe
- preInMPP.exe
- loadclean.exe
The following registry keys may be deleted:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run- Ukbybc
- Tern
- ControlPanel
- alchem
- BullsEye Network
- dmesewxqtj
- Internet Optimizer
- IST Servicemsbb
- Power Scan
- Winad Client
Symptoms
Desktop firewall program alerting that a foreign application is attempting to access the Internet.
Method of Infection
This purpose of this trojan is simply to download a file from the Internet and execute it. It does not self-replicate. Such trojans are frequently sent in spammed emails designed to entice the recipient into running the file. Other likely distribution channels for this trojan include via IRC, via peer-to-peer file-sharing networks, as an attachment in newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.
Removal
All Users:
Use current engine and DAT files for detection and removal.
Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).
Variants
Variants
N/A
All Information
Overview -
This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.
Aliases
- Downloader.Lunii (Symantec)
- Trojan.Win32.Qhost.n (AVP)
Characteristics
Characteristics -
-- Update October 7th, 2004 --
The risk assessment of this threat has been updated to Low-Profiled due to media attention at:
http://www.pcworld.com/news/article/0,aid,118098,00.asp
--
This trojan overwrites the local HOSTS file (such as c:\windows\system32\drivers\etc\hosts) to prevent the local system from accessing domain names. It also attempts to connect to a remote website, to download and automatically execute several files on the infected machine.
When run, the trojan overwrites the host file to point several adware and porn sites to 127.0.0.3
It attempts to download files and save them using the following filenames:
- mstasks1.exe
- toolbar.exe
- dktime.exe
- dk.exe
- dk32.exe
- test
- sexxx.exe
This trojan may also try to terminate the following running processes:
- lpt.exe
- ir.exe
- intron.exe
- intronet.exe
- twink64.exe
- usb.exe
- teur.exe
- host32.exe
- sidefind.exe
- alchem.exe
- powerscan.exe
- bdl74125.exe
- Installer2.exe
- ttgkirnl.exe
- bargains.exe
- WinClt.exe
- Winad.exe
- istsvc.exe
- actalert.exe
- optimize.exe
- iinstall.exe
- fnnmqi.exe
- exdl.exe
- printer.exe
- printer32.exe
- ykyrtws.exe
- loadclean.exe
- telnet.exe
The trojan may attempt to delete the following files
- host32.exe
- telnet.exe.tmp
- mouse.exe
- com.exe
- fnnmqi.exe
- exdl.exe
- exe2bin.exe
- exul.exe
- fastopen.exe
- mscdexnt.exe
- printer.exe
- printer32.exe
- ykyrtws.exe
- lpt.exe
- ir.exe
- intron.exe
- intronet.exe
- twink64.exe
- usb.exe
- alchem.exe
- adp8027_ISEARCHTECH5.exe
- preInsTT.exe
- preInsln.exe
- preInMPP.exe
- loadclean.exe
The following registry keys may be deleted:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run- Ukbybc
- Tern
- ControlPanel
- alchem
- BullsEye Network
- dmesewxqtj
- Internet Optimizer
- IST Servicemsbb
- Power Scan
- Winad Client
Symptoms
Symptoms -
Desktop firewall program alerting that a foreign application is attempting to access the Internet.
Method of Infection
Method of Infection -
This purpose of this trojan is simply to download a file from the Internet and execute it. It does not self-replicate. Such trojans are frequently sent in spammed emails designed to entice the recipient into running the file. Other likely distribution channels for this trojan include via IRC, via peer-to-peer file-sharing networks, as an attachment in newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.
Removal -
Removal -
All Users:
Use current engine and DAT files for detection and removal.
Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).
Additional Windows ME/XP removal considerations
Variants
Variants -
N/A
