Threat Descriptions

Worm:W32/Hairy.A

Classification

Category :

Malware

Type :

Worm

Platform :

W32

Aliases :

Virus.Win32.AutoRun.dv

Summary

This malware was written in AutoIt scripting. It uses an icon of MS Winword.

Removal

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.

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

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    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.

Technical Details

Upon execution, it creates a file HarryPotter-TheDeathlyHallows.doc that has the following text and opens it using MS Winword:

  • --- Harry Potter is dead. ---

It creates the folder C:\WINDOWS\Cache and copies itself as HarryPotter-TheDeathlyHallows.exe to the said folder. This file will be copied from drives C to J if present. It will also be copied to the folder C:\Documents and Settings\All Users\Desktop.

This malware creates a file named harry potter.txt which contains the following text:

  • --- Harry Potter is a dumb kid,so is Daniel . Ron Weasley is ugly but who cares . Hermione is pretty and exploited but who cares? . Dumbledore is old and haggard but who cares? . JK Rowling was an ex-witch but who cares, betcha didnt know. . All we care is that...... . Harry Potter is gonna die! . Okay, you can now get yourself a copy of the dumb Harry Potter book. ---

It also creates autorun.inf which will be copied to file which has the following data. This file be copied from drives C to J if present.

  • [Autorun] open=HarryPotter-TheDeathlyHallows.exe e shellexecute=HarryPotter-TheDeathlyHallows.exe e shell\Auto\command=HarryPotter-TheDeathlyHallows.exe e shell=Auto

After running itself, it will force restarting the infected machine.

Payload One

It deletes all existing scheduled tasks by rendering the following command:

  • AT /delete /yes

Note: AT is the command-line for task scheduler.

It attempts to create the following tasks but due to some instability of the code, it might not create them all:

  • AT 8:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 9:00 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 10:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 11:00 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 12:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 13:00 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 14:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 16:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.ex AT 17:00 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 18:30 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe AT 19:00 /every:M,T,W,TH,F,S,SU C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe

Note: This means that the file C:\WINDOWS\Cache\HarryPotter-TheDeathlyHallows.exe will be run everyday at the specified time.

Payload Two

It changes the Windows Product Owner and Product ID causing Windows Genuine Advantage validation to be triggered. There then no longer appears to be a valid Windows Operating System. This is done by modifying the following registry keys:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion RegisteredOwner = "Harry Potter"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion ProductId = "HARRY-POT-TERHATE-SYOU1")

Note: To check this, you can press WindowsLogo key + Pause/Break key

Payload Three

It changes Internet Explorer's Window Title to 'JK Rowling Owns You'. It changes the start page as well.

Payload Four

It disables/hides the following System tools:

  • Task Manager
  • Registry Editor
  • Folder Options
  • Windows File search
  • Right-Click or Context Menu
  • System Tray
  • System Clock
  • Windows Firewall

Payload Five

It creates the following users:

  • Harry-Potter
  • Ron-Weasley
  • Hermione-Granger

Payload Six

It runs a batch file on every start of the infected machine that displays the following message:

This batch file is saved at C:\WINDOWS\Tempt\talk.bat. It creates the following registry key so that in every machine start up this batch will be executed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run talk =C:\WINDOWS\Tempt\talk.bat