Eira is an e-mail worm written in Visual Basic. Being run the worm shows a messagebox, then connects to MAPI-compatible e-mail browser, reads e-mail addresses from Address Book and sends itself to all these addresses.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
The infected message properties look like that:
Subject can contain one of the following:
Something very special I know you will like this Yes, something I can share with you Wait till you see this! A brand new game! I hope you enjoy it
Body can contain one of the following:
Hey you, take a look at the attached file. You won't believe your eyes when you open it! You like games like Quake? You will enjoy this one. Did you see the pictures of me and my battery operated boyfriend? My best friend, This is something you have to see! Till next time Is Internet that safe? Check it out
Attachment's name can be one of the following:
setup.exe honey.exe quake4demo.exe
The worm deletes sent infected messages.
The worm also installs itself to system by copying its file as setup.exe, honey.exe or quake4demo.exe to Windows folder and modifying startup keys in the Registry. The worm also copies itself as 'c:\eiram\quake4demo.exe' and 'f:\\quake4demo.exe' (if F: drive exists).
The worm can overwrite files with .OCX, .EXE, .XLS, .DOC, .MDB, .HTM, .HTML and .TXT extensions with the following text:
You've didn't protected your files well enough Let this be a lesson! Never trust someone else eiram 1999-2001
F-Secure Anti-Virus detects this worm with the latest updates. By the time of this description creation the worm was not found in the wild.
Technical Details: Alexey Podrezov; F-Secure Corp.; November 30th, 2001