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Nightflyght


Aliases:


Nightflyght
VBS/Nightflyght.A@mm, VBS_Nflight.A, Bloodhound.VBS.Worm

Malware
Worm
VBS

Summary

Nightflyght is a polymorphic Visual Basic Script worm.



Disinfection & Removal

Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details


Variant:Nightflyght.A

Nightflyght.A worm spreads using Outlook and mIRC. The infected Outlook messages looks as follows:

	Subject: Hi :-)
	Body: <sctipt code>

The worm send itself as an embedded HTML, not as a separate attachment. Nightflyght lower Internet Explorer security zones and WSH security settings:

	HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\
	HKCU\Software\Microsoft\Windows Script Host\Settings\TrustPolicy

The worm contains several payloads. If the day is 5th and any month, it removes the desktop:

	HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDesktop

changes the registered owner to 'NightFlight':

	HKLM\Software\Microsoft\Windows\CurrentVersion\RegisteredOwner

and the registered organization to 'Carpe Noctem':

	HKLM\Software\Microsoft\Windows\CurrentVersion\RegisteredOrganization

The worm also changes the wallpaper to a random bit map file found on the infected system:

	HKCU\Control Panel\desktop\Wallpaper

Nightflight.A spreads via mIRC by modifying the Script.ini file. To do this it uses file warning.htm that it drops in Windows folder.

The worm affects Windows SE by executing Microsoft Agent and showing the following message:

	"The Nightflight is still out there!"





Technical Details: Katrin Tocheva, F-Secure; May 31, 2001



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