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Virus:Worm/Autorun.81920.E
Date discovered:20/07/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:79.872 Bytes
MD5 checksum:b707e8ae7049089b0a65b8f3d12b1491
VDF version:7.10.04.34
IVDF version:7.10.09.138 - Tuesday, July 20, 2010

 General Method of propagation:
    Messenger


Aliases:
   •  Bitdefender: Win32.Worm.Palevo.BR
   •  Panda: W32/Koobface.JK
   •  Eset: IRC/SdBot


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%\jusched.exe
   • %WINDIR%\jusched.exb



It deletes the initially executed copy of itself.




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%\jusched.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]
   • "Java developer Script Browse"="%WINDIR%\jusched.exe"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\
   Install\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Java developer Script Browse"="%WINDIR%\jusched.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Java developer Script Browse"="%WINDIR%\jusched.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%\jusched.exe:*:Enabled:Java
      developer Script Browse"

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

 Skype
 Yahoo 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: 202.157.17**********.20
Port: 2345
Channel: #!gf!
Nickname: NEW-[USA|00|P|%number%]

 Miscellaneous Accesses internet resources:
   • http://browseusers.myspace.com/Browse/**********
   • http://208.43.36.96/**********


Mutex:
It creates the following Mutexes:
   • oleacc-msaa-loaded
   • Micro Upe

 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.

Description insérée par Petre Galan le lundi 17 janvier 2011
Description mise à jour par Petre Galan le lundi 17 janvier 2011

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