Full description

Virus:	TR/Yakes.li
Date discovered:	14/06/2011
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Low to medium
Damage Potential:	Medium
Static file:	Yes
File size:	51.200 Bytes
MD5 checksum:	A5423C14D3E1BD10791A7B1DA79AE8F5
VDF version:	7.11.09.168 - Tuesday, June 14, 2011
IVDF version:	7.11.09.168 - Tuesday, June 14, 2011

General Method of propagation:
   • Autorun feature

Aliases:
   • Mcafee: W32/Autorun.worm.h
   • Kaspersky: Trojan.Win32.Yakes.li
   • 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
   • Steals information

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\ControlSet001\Services\SvrWsc]
   • "Type"=dword:00000010
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "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."

Backdoor Contact server:
The following:
• etrademone.**********/point/forum/index.php

As a result it may send information and remote control could be provided.

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

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

說明撰寫者 Andrei Ilie 開啟 2011年8月1日星期一
說明更新者 Andrei Ilie 開啟 2011年8月3日星期三

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