Nightflyght

Classification

Malware

Worm

W32

Nightflyght, Nightflyght

Summary

Nightflyght is a polymorphic Visual Basic Script worm.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

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  • Submit a sample

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    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

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Technical Details

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

Subject: Hi :-)

Body:{script code}

The worm send itself as an embedded HTML, not as a separate attachment.

Nightflyght lowers Internet Explorer security zones and Windows Script Host (WSH) security settings:

HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\ HKCU\Software\Microsoft\Windows Script Host\Settings\TrustPolicyThe worm contains several payloads. If the day is 5th and in any month, it removes the desktop:

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

and 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 the Windows folder.

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


Variant:Nightflyght.A

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

 Subject: Hi :-)
Body:{script 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!"