Full description

Virus:	TR/Drop.Binder.agm
Date discovered:	22/03/2010
Type:	Trojan
Subtype:	Dropper
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	79.872 Bytes
MD5 checksum:	fc8cc530bd25de226b71db6edad47a1b
VDF version:	7.10.02.65
IVDF version:	7.10.05.161 - Monday, March 22, 2010

General Method of propagation:
   • Autorun feature
   • Messenger
   • Peer to Peer

Aliases:
   • Sophos: W32/Autorun-BBI
   • Panda: Bck/PCClient.KF
   • Eset: Win32/Peerfrag.BL
   • Bitdefender: Trojan.Dropper.Agent.UWC

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

Side effects:
   • Drops malicious files
   • Registry modification

Files It copies itself to the following locations:
   • %recycle bin%\%CLSID%\wnzip32.exe
   • %drive%\RECYCLER\autorun.exe

The following files are created:

– %recycle bin%\%CLSID%\Desktop.ini
– %drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
• "Taskman"="%recycle bin%\%CLSID%\wnzip32.exe"

P2P In order to infect other systems in the Peer to Peer network community the following action is performed:   It retrieves shared folders by querying the following registry keys:
   • Software\BearShare\General
   • Software\iMesh\General
   • Software\Shareaza\Shareaza\Downloads
   • Software\Kazaa\LocalContent
   • Software\DC++
   • Software\eMule
   • Software\Microsoft\Windows\CurrentVersion\Uninstall\eMule Plus_is1

   It searches for directories that contain the following substring:
   • \Local Settings\Application Data\Ares\My Shared Folder

Messenger It is spreading via Messenger. The characteristics are described below:

– MSN Messenger

The URL then refers to a copy of the described malware. If the user downloads and executes this file the infection process will start again.

Backdoor The following ports are opened:

– mails.leb**********.com on UDP port 8118
– mails.nad**********.org on UDP port 8118
– mails.cli**********.net on UDP port 8118

Injection – It injects itself as a remote thread into a process.

Process name:
• explorer.exe

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

설명 삽입자 Petre Galan 2010년 5월 21일 금요일
설명 업데이트 Andrei Ivanes 2010년 6월 4일 금요일

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