Amus.A

Amus is packed with Yoda. It's packed size is 51782.

Once executed it creates a a mutex named "Masum". In order to avoid being run more than once. And copies itself to

C:\masum.exe

It drops copies of itself in the Windows folder with names from:

Messenger.exe My_Pictures.exe Meydanbasi.exe Pide.exe Pire.exe Cekirge.exe Ankara.exe Adapazari.exe Anti_Virus.exe KdzEregli.exe

A registry key will be set to point to one of the dropped files:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\] "Microzoft_Ofiz" = "C:\%WinDir%\KdzEregli.exe"

Where %WinDir% is the main Windows folder.

Spreading in emails

It send emails with subject:

Listen and Smile

And body:

Hey. I beg your pardon. You must listen.

The attached file will be named:

masum.exe

Payload

When the virus is run, it uses the Windows Speech Engine to speak the following message:

How are you. I am back. My name is mister hamsi. I am seeing you. Haaaaaaaa. You must come to turkiye. I am cleaning your computer. 5. 4. 3. 2. 1. 0. Gule. Gule.

If the day of the month is 10th or 23rd, the worm will attempt to delete all INI files from the Windows folder.

If the day of the month is 2nd, 15th or 17th, the worm will attempt to delete all DLL files from the Windows folder.