Win32.Bagz.B@mm

( N/A )

SYMPTOMS:

Presence of files %SYSTEM%\tutorial.doc.exe with the size of 163842 bytes (a copy of the virus), %SYSTEM%\syslogin.exe(112128 bytes) and %SYSTEM%\dl.exe (10240 bytes).

Presence of registry key
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\syslogin.exe = syslogin.exe.

TECHNICAL DESCRIPTION:

This is a mass-mailer that also drops a backdoor. It also tries to disable the windows firewall
and to installs it's own network driver in order to avoid detection by normal firewalls.

The worm starts a thread that searches for mail addresses every 2 hours in files of types
.txt
.htm
.dbx
.tbi
.tbb


It sends mail using it's own SMTP engine (it parses the mail address and then uses a DNS query to connect
directly to the recipient's SMTP server).


The mail has the following format:
Sender: spoofed.

Subeject (one of):
last request before refunding
Re: User ID Update
Fwd: Your Funds are Eligible for Withdrawal
find a solution with this customer
No Subject
Re: Help Desk Registration
failure notice
Fwd: Password
when should i call you?
RE: Re: A question
Knowledge Base Article
Open Invoices
Returned mail: see transcript for details
building maintenance
[Fwd: Broken link]
WinXP
troubles are back again
Questions
Order Approval
units available
progress news
big announcements
Need help pls
You have recieved an eCard!
What is this ????
Deactivation Notice
Message recieved, please confirm
My funny stories
Cost Inquiry
Re: payment
referrences
Webmail Invite
RE: quote request

Body (one of):
Hello,
Sorry, I forgot to attach the new contact information.
Please view the attached (.pdf) contact sheet.
Sincerely,
User

Hello,
I resent this email as attachment because
it was previously blocked by your email filters.
Please read the attachment and respond.
Thanks,User

Hello,
I was in a hurry and I forgot to attach an important
document. Please see attached.
Best Regards,
User

Hello,
Your email was received.
YOUR REPLY IS URGENT!
Please view the attached text file for instructions.
Regards,
User

Hello,
Your email was sent in an INVALID format.
To verify this email was sent from you,
simply open the attached email (.eml) file
and click yes in the sender options box.
Thank You,
User

Hello,
My PC crashed while I was sending that last email.
I have re-attached the document of yours that I discovered.
Please read attached document and respond ASAP.
Sincerely,
User

Hello,
What version of windows you are using?
This last document I received from you came out weird.
Please see the attached word file and resend the file to me.
Many thanks,
User

***YOUR MESSAGE HAS BEEN RECOGNIZED AS SPAM***
Hello,
The previous email you sent has been recognized as spam.
This means your email was not delivered to your friend or client.
You must open the attached file to receive more information.
***YOUR MESSAGE HAS BEEN RECOGNIZED AS SPAM***

***ATTENTION: YOUR EMAIL IS NOT BEING DELIVERED!***
You are currently unable to send emails.
This may be a billing issue.
Please call the billing center.
The # for the billing office is located in the attached
contact list for your convenience.
***ATTENTION: YOUR EMAIL IS NOT BEING DELIVERED!***

***URGENT: SERVICE SHUTDOWN NOTICE***
Due to your failure to comply with our email
Rules and Regulations, your email account has been
temporarily suspended for 24 hours unless we are contacted regarding
this situation.
You must read the attached document for further
instructions. Failure to comply will result in termination of your account.
Regards,
Net Operator
***URGENT: SERVICE SHUTDOWN NOTICE***

Attachment (one of; also, notice the spaces before the extension):
doc.doc .exe
documents.doc .exe
atach.doc .exe
file.doc .exe
read.doc .exe
readme.doc .exe
contact.doc .exe
mail.doc .exe
att.doc .exe
warning.doc .exe
db.doc .exe
msg.doc .exe
message.doc .exe
messages.doc .exe
archive.doc .exe
arch.doc .exe
support.doc .exe
account.doc .exe
doc.zip
documents.zip
atach.zip
file.zip
read.zip
readme.zip
contact.zip
mail.zip
att.zip
warning.zip
db.zip
msg.zip
message.zip
messages.zip
archive.zip
arch.zip
support.zip
account.zip

Removal instructions:

Please let BitDefender disinfect your files.

ANALYZED BY:

Alexandru Carp,BitDefender Virus Researcher