Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:WORM/Autorun.abo.37
Date discovered:22/06/2011
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:50.688 Bytes
MD5 checksum:80663742E6C0B212D0445B6DE39F65C4
VDF version:7.11.10.68 - Wednesday, June 22, 2011
IVDF version:7.11.10.68 - Wednesday, June 22, 2011

 General Method of propagation:
    Autorun feature


Aliases:
   •  TrendMicro: TROJ_SPNR.11I711
   •  Sophos: Mal/Zbot-ASK
     Microsoft: Worm:Win32/Autorun.ABO


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
    Windows Vista
    Windows 7


Side effects:
   • Third party control
   • Drops files
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\svrwsc.exe



The following file is created:

%TEMPDIR%\Low%hex values%.tmp.bat This batch file is used to delete a file.

 Registry One of the following values is added in order to run the process after reboot:

  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "SvrWsc"=""



The following registry keys are added in order to load the service after reboot:

[HKLM\SYSTEM\CurrentControlSet\Services\SvrWsc]
   • "Type"=dword:0000000a
   • "Start"=dword:00000002
   • "ErrorControl"="0"
   • "ImagePath"="\"%SYSDIR%\svrwsc.exe\""
   • "DisplayName"="Windows Security Center Service"
   • "ObjectName"="LocalSystem"
   • "Description"="The service provides COM APIs for independent software vendors to register and record the state of their products to the Security Center service."



The following registry key is added:

[HKLM\SYSTEM\ControlSet001\Services\SvrWsc\Enum]
   • "@"="Root\LEGACY_SVRWSC\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001

 Backdoor Contact server:
One of the following:
   • **********etwop.ru:80
   • **********adert.ru:80


 Injection  It injects itself as a remote thread into processes.

    All of the following processes:
   • winlogon.exe
   • services.exe
   • userinit.exe
   • iexplore.exe
   • firefox.exe
   • msimn.exe
   • outlook.exe
   • explorer.exe
   • svchost.exe
   • rundll32.exe

   If successful, the malware process terminates while the injected part remains active.

 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 the following runtime packer:
   • UPX

Description inserted by Andrei Ilie on Friday, October 21, 2011
Description updated by Andrei Ilie on Monday, October 24, 2011

Back . . . .