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Virus:Worm/Agent.qgv.5
Date discovered:15/09/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:81.920 Bytes
MD5 checksum:515181f0c3581519499f18aadb767557
VDF version:7.10.05.45
IVDF version:7.10.11.186 - Wednesday, September 15, 2010

 General Method of propagation:
   • Messenger


Aliases:
   •  Kaspersky: Trojan.Win32.Jorik.IRCbot.ge
   •  Sophos: Troj/Agent-PRU
   •  Bitdefender: Trojan.Generic.4866655
   •  Panda: W32/LoLbot.N.worm
   •  GData: Trojan.Generic.4866655


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


Side effects:
   • Third party control
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following locations:
   • %WINDIR%\nvsvc32.exb
   • %WINDIR%\nvsvc32.exe



It deletes the initially executed copy of itself.



The following files are created:

– %WINDIR%\wintybrd.png
– %WINDIR%\mdll.dl
– %WINDIR%\wintybrdf.jpg



It tries to execute the following files:

– Filename:
   • net stop MsMpSvc


– Filename:
   • net1 stop MsMpSvc


– Filename:
   • netsh firewall add allowedprogram 1.exe 1 ENABLE


– Filename:
   • %WINDIR%\nvsvc32.exe


– Filename:
   • explorer.exe http://browseusers.myspace.com/Browse/Browse.aspx


– Filename:
   • net stop wuauserv


– Filename:
   • sc config wuauserv start= disabled


– Filename:
   • net1 stop wuauserv

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

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\
   Install\Software\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"



It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%executed file%"="%WINDIR%\nvsvc32.exe:*:Enabled:NVIDIA driver
      monitor"

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

– Windows 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.

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: 199.5.**********.115
Port: 1234
Channel: #!nn!
Nickname: NEW-[USA|00|P|%number%]

 Miscellaneous Accesses internet resources:
   • http://browseusers.myspace.com/Browse/**********
   • http://174.37.200.82/**********


Mutex:
It creates the following Mutex:
   • Nvidia Drive Mon

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


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

Descrição enviada por Petre Galan em terça-feira, 29 de março de 2011
Descrição atualizada por Petre Galan em terça-feira, 29 de março de 2011

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