Full description

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.

说明添加者： Petre Galan 打开 2011年1月17日星期一
说明更新者： Petre Galan 打开 2011年1月17日星期一

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