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Date discovered:31/05/2010
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:54.784 Bytes
MD5 checksum:68cb014659cd5eb7fbee5096090ee3a0
IVDF version:

 General Aliases:
   •  Sophos: Mal/FakeAV-CZ
   •  Bitdefender: Trojan.Bredolab.BX
   •  Panda: Bck/Bredolab.AZ
   •  Eset: Win32/SpamTool.Tedroo.AF

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Downloads a malicious file
   • Registry modification
   • Uses its own Email engine

 Files It overwrites a file.

It deletes the initially executed copy of itself.

It tries to download a file:

– The location is the following:

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\
   • "userini"="%WINDIR%\explorer.exe:userini.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "userini"="%WINDIR%\explorer.exe:userini.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "userini"="%WINDIR%\explorer.exe:userini.exe"

– [HKLM\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\
   • "userini"="%WINDIR%\explorer.exe:userini.exe"

The following registry key is added:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer]
   • "id"="9E7C01C66934"
   • "remove"="%executed file%"

 Email It contains an integrated SMTP engine in order to send Spam emails. A direct connection with the destination server will be established. The characteristics are described in the following:

The sender address is spoofed.

– Email addresses found in specific files on the system.
– Generated addresses

The subject of the email is constructed out of the following:

    It starts with one of the following:
   • %receiver's email address%

    Continued by one of the following:
   • September

    Continued by one of the following:
   • 44% OFF

– Contains HTML code.

   • Dear %receiver's email address%
     Get ready to make her happy.
     Discount price store: ID74827
     We do guarantee high-quality medications, instant worldwide delivery and friendly support.
     © 2001-2010 Pfizer Inc. All rights reserved.

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Wednesday, September 15, 2010
Description updated by Petre Galan on Wednesday, September 15, 2010

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