Full description

Virus:	Worm/Kolab.gdz
Date discovered:	15/02/2010
Type:	Worm
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	262.663 Bytes
MD5 checksum:	0221abcdf765f623a50ed806fd8b665a
IVDF version:	7.10.04.60 - Monday, February 15, 2010

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

Aliases:
   • Sophos: Troj/Nyrate-L
   • Panda: W32/P2Pworm.GA
   • Eset: Win32/Peerfrag.EC
   • Bitdefender: Backdoor.Tofsee.Gen

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

Side effects:
   • Drops malicious files
   • Registry modification

Files It copies itself to the following locations:
   • %drive%\usecure\usecure32.exe
   • %drive%\RECYCLER\%CLSID%\MsMxEng.exe

The following files are created:

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

– %drive%\RECYCLER\%CLSID%\Desktop.ini

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%\MsMxEng.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 port is opened:

– dig**********.cn on UDP port 44403

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

Process name:
• explorer.exe

File details Programming language:
The malware program was written in MS Visual C++.

說明撰寫者 Petre Galan 開啟 2010年6月30日星期三
說明更新者 Petre Galan 開啟 2010年6月30日星期三

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